Black Silicon Carbide (B-SiC)
Abrasives, Refractory & Metallurgical Grades
From steelmaking deoxidation to precision grinding wheels — black SiC covers the broadest application range of any silicon carbide variant. Six purity grades (85–99% SiC), Mohs 9.2 hardness, and cost-effective Acheson production make it the backbone of industrial abrasives, refractory monolithics, and metallurgical processing worldwide.
Physical & Thermal Properties
Typical Properties of Black Silicon Carbide
Black SiC combines extreme hardness, chemical inertness, and excellent thermal conductivity — making it one of the most versatile industrial materials for abrasive, refractory, and metallurgical applications.
| Property | Value | Industrial Significance |
|---|---|---|
| Crystal Structure | α-SiC, hexagonal (monocrystalline) | Blocky, sharp-edged grain shape provides efficient cutting and self-sharpening behavior |
| Mohs Hardness | 9.2 | Second only to diamond and B₄C; enables grinding of hard non-ferrous metals and ceramics |
| Knoop Hardness (100g) | 2,480 kg/mm² | High micro-hardness ensures consistent abrasive performance under load |
| Density | 3.20–3.22 g/cm³ | High density allows particles to penetrate workpiece surface effectively |
| Bulk Density (macro grits) | 1.35–1.55 g/cm³ | Optimized packing density for bonded abrasive formulations |
| Thermal Conductivity | 50–100 W/m·K | Superior heat dissipation prevents thermal damage during grinding and in refractory linings |
| Coefficient of Thermal Expansion | 4.0–4.5 × 10⁻⁶ /K | Low CTE provides excellent thermal shock resistance in refractory applications |
| Max Service Temperature (Air) | 1,900 °C | Stable at steelmaking and foundry temperatures; does not decompose prematurely |
| Max Service Temperature (Inert) | 2,400 °C | Extremely stable in reducing atmospheres — suitable for furnace linings and crucibles |
| Decomposition Point | ~2,250 °C | High decomposition temperature ensures structural integrity under extreme heat |
| Chemical Inertness | Resistant to acids & alkalis | Does not react with most molten metals, slags, or process chemicals |
| Particle Shape | Blocky, sharp-edged, semi-friable | Sharp edges provide aggressive cutting; semi-friability enables self-sharpening during grinding |
Product Range
Six Grades, One Material — From Deoxidizer to Precision Abrasive
Black SiC’s strength lies in its versatility. A single furnace produces crystals spanning 85% to 99% SiC purity — each grade serving a distinct industrial purpose. Select your grade by application, not by assumption.
B-SiC 99
Ultra-high purity for precision abrasives & advanced ceramics
B-SiC 98
High-purity abrasive & refractory grade
B-SiC 97
General-purpose abrasive for bonded & coated abrasives
B-SiC 95
Refractory & bonded abrasive grade
B-SiC 90
Most popular refractory & metallurgical grade
B-SiC 85
Metallurgical deoxidizer & energy booster
Technical Data
Chemical Composition & Grit Size Standards
Complete chemical specifications and FEPA/JIS grit size data for FerrumX black silicon carbide. All products are precision-graded and shipped with certificates of analysis (COA).
Chemical Composition — Processing Grades
| Grade | SiC (%) | F.C. (%) | Fe₂O₃ (%) | H₂O (%) | Primary Application |
|---|---|---|---|---|---|
| 99# | ≥99.00 | ≤0.10 | ≤0.10 | ≤0.10 | Precision abrasives, wire-saw, advanced ceramics |
| 98# | ≥98.00 | ≤0.25 | ≤0.30 | ≤0.30 | Bonded abrasives, refractory castables |
| 97# | ≥97.00 | ≤0.30 | ≤0.40 | ≤0.30 | Coated abrasives, sandblasting media |
| 95# | ≥95.00 | ≤1.00 | ≤1.00 | ≤0.30 | Refractory bricks, taphole clay |
| 90# | ≥90.00 | ≤2.20 | ≤2.30 | ≤0.50 | Refractory monolithics, metallurgical additive |
| 85# | ≥85.00 | ≤3.00 | ≤3.00 | ≤1.00 | Steelmaking deoxidizer, BOF energy booster |
Macro Grits: F8–F220 (FEPA Standard)
| Grit No. | Particle Size (μm) | Min SiC (%) | Max F.C. (%) | Max Fe₂O₃ (%) | Bulk Density (g/cm³) |
|---|---|---|---|---|---|
| F8 | ~2000 | 99.0 | 0.40 | 0.40 | 1.42–1.50 |
| F12 | ~1400 | 99.0 | 0.40 | 0.40 | 1.41–1.49 |
| F24 | ~600 | 99.0 | 0.40 | 0.40 | 1.45–1.53 |
| F46 | ~300 | 99.0 | 0.40 | 0.40 | 1.47–1.55 |
| F80 | ~150 | 99.0 | 0.40 | 0.40 | 1.44–1.52 |
| F120 | ~90 | 99.0 | 0.40 | 0.40 | 1.40–1.48 |
| F220 | ~45 | 99.0 | 0.40 | 0.40 | 1.36–1.44 |
Micro Grits: F230–F1500 (FEPA Standard)
| Grit No. | Particle Size (μm) | Min SiC (%) | Max F.C. (%) | Max Fe₂O₃ (%) | Loose Pack Density (g/cm³) |
|---|---|---|---|---|---|
| F230 | 28–32 | 98.6 | 0.40 | 0.08 | 1.27 ± 0.05 |
| F320 | 16–20 | 98.6 | 0.40 | 0.08 | 1.17 ± 0.08 |
| F500 | 5–8 | 99.6 | 0.20 | 0.08 | 0.95 ± 0.08 |
| F800 | 2–3 | 99.6 | 0.20 | 0.08 | 0.81 ± 0.08 |
| F1200 | 0.7–1.5 | 99.4 | 0.20 | 0.08 | — |
| F1500 | 0.5–1.0 | 99.4 | 0.20 | 0.08 | — |
Unique to Black SiC
Metallurgical & Refractory Deep Dives
Black SiC’s lower purity grades (85–90%) unlock applications that green SiC cannot serve — these are the two largest exclusive markets for black SiC.
Steelmaking Deoxidation Mechanism
Black SiC (85–90% grade) is charged into induction furnaces, ladle furnaces, and BOF converters as a combined deoxidizer and exothermic agent.
Si + 2[O] → SiO₂ (ΔH = −901.76 kJ/mol)
[C] + [O] → CO↑
Unlike ferrosilicon (which carries 1–2% Al), black SiC introduces minimal aluminum — reducing Al₂O₃ inclusion formation that degrades steel quality. In BOF converters, the exothermic oxidation of Si raises bath temperature, reducing the need for scrap cooling and lowering lime consumption by 2–5 kg/tonne steel.
Refractory Performance Advantage
Black SiC (90–98% grade) is a critical raw material for tap hole clay, iron runner castables, and specialty refractory bricks. Its thermal conductivity and oxidation resistance extend refractory life dramatically.
SiC’s thermal conductivity (50–100 W/m·K, vs ~2 W/m·K for alumina-silicate) enables rapid heat distribution, eliminating hot spots and reducing thermal shock damage. In blast furnace tap hole clay, SiC extends campaign life from 3–4 months (alumina-silicate) to 8–12 months. In iron runner castables, SiC content of 12–25% reduces castable erosion by 40–60%.
Black SiC vs Alternative Materials — Cost-Performance Analysis
Black SiC’s unique value proposition: harder than aluminum oxide, cheaper than green SiC, and more effective than ferrosilicon for deoxidation. Here’s how it compares.
| Material | Mohs | Knoop | Relative Cost | Best For | Limitation |
|---|---|---|---|---|---|
| Black SiC (B-SiC 97) | 9.2 | 2480 | Baseline (1.0×) | Non-ferrous metals, stone, glass, ceramics, refractory | Reacts with iron at high T — not for steel grinding |
| Green SiC (GC 99) | 9.4–9.5 | 2600 | 2–5× black SiC | Tungsten carbide, semiconductor, precision polishing | Significant cost premium; overkill for general use |
| Aluminum Oxide (Al₂O₃) | 9.0 | 2100 | ~0.5–0.7× black SiC | Ferrous metals (steel, iron), general-purpose grinding | Lower hardness → slower cutting, shorter wheel life |
| Ferrosilicon (FeSi 75%) | — | — | ~1.5–2× B-SiC 85 | Steelmaking deoxidation (traditional choice) | 1–2% Al content → Al₂O₃ inclusions; no exothermic benefit |
Key takeaway: Black SiC occupies the sweet spot between Al₂O₃ (too soft) and green SiC (too expensive) for the majority of industrial applications.
FEPA F-Grit Reference
FEPA F-Grit Size Chart — Black SiC Abrasive Grains
Complete grit size reference for bonded abrasive applications. D50 median diameter and size range per FEPA standard — match your grit to your grinding, lapping, or finishing requirement.
| Grit | D50 (μm) | Size Range (μm) | Typical Application |
|---|---|---|---|
| F12 | 1,765 | 2,000–1,400 | Heavy structural steel preparation |
| F24 | 745 | 1,000–600 | Coarse grinding, rough lapping |
| F36 | 525 | 600–425 | Medium grinding |
| F46 | 370 | 425–300 | General grinding |
| F60 | 260 | 300–212 | Medium-fine grinding |
| F80 | 185 | 212–150 | Fine grinding |
| F100 | 129 | 150–106 | Very fine grinding |
| F120 | 109 | 125–90 | Precision grinding |
| F150 | 82 | 106–75 | Super-fine grinding |
| F180 | 69 | 90–63 | Fine finishing |
| F220 | 58 | 75–53 | Very fine finishing |
| P-Grit (Coated Abrasive) | D50 (μm) | Equivalent F-Grit | Coated Abrasive Application |
|---|---|---|---|
| P24 | 745 | ≈ F24 | Coarse sandpaper for stock removal |
| P60 | 260 | ≈ F60 | Medium sandpaper, general-purpose finishing |
| P120 | 109 | ≈ F120 | Fine sandpaper, surface prep before coating |
F-grits = bonded abrasives (vitrified/resin wheels); P-grits = coated abrasives (sandpaper/belts). Size ranges per FEPA 42-1:2006 standard.
Blasting Surface Profile
SiC Grit Blasting — Ra / Rz Surface Roughness Reference
Select the correct SiC grit size to achieve your target surface profile (Ra/Rz) and ISO 8501 cleanliness grade. Critical for coating adhesion specification compliance.
| SiC Grit (FEPA) | D50 (μm) | Ra on Steel (μm) | Rz (μm) | ISO 8501 |
|---|---|---|---|---|
| F16–F24 | 750–1,180 | 12–20 | 60–110 | Sa 3 |
| F36–F46 | 380–500 | 8–13 | 42–70 | Sa 2.5–3 |
| F60–F80 | 185–260 | 5–9 | 28–50 | Sa 2.5 |
| F100–F120 | 109–129 | 3–5 | 16–28 | Sa 2.5 |
| F150–F180 | 78–92 | 1.5–3 | 8–16 | Sa 2–2.5 |
| F220–F320 | 46–66 | 0.5–1.5 | 3–8 | Sa 2 |
Ra values based on 70 PSI direct-pressure blasting, carbon steel substrate (HRC 15–20). Actual profiles vary with blast pressure, stand-off distance, and angle of incidence.
Manufacturing
From Raw Materials to Finished SiC — 6 Steps at 2,500°C
Black silicon carbide is born in the Acheson resistance furnace — a 36–48 hour journey from silica sand and petroleum coke to crystalline α-SiC. Here is the complete production cycle that determines your product’s purity, crystal structure, and cost.
STEP 01
Raw Material Preparation
Quartz sand (SiO₂ ≥98%) + petroleum coke (fixed C ≥98%) + wood chips (porosity) + NaCl (impurity removal). Carbon is kept 3–5% above the stoichiometric requirement to ensure complete SiO₂ conversion.
Key ratio: SiO₂:C ≈ 1:2.2 (molar excess)
STEP 02
Furnace Charging
Graphite furnace core (conductor) positioned centrally. Mixed raw materials are filled in layers around the core. An insulation layer of coke powder and quartz sand is packed on the outside to retain heat and reduce energy losses.
Furnace dimensions: ~15m long, ~3m diameter
STEP 03
Electrolytic Smelting
5,000–10,000 A current applied through a graphite core. Temperature rises: SiO₂+C reaction begins at ~1,400°C; SiC crystal formation completes at 2,000–2,500°C. Duration: 24–40 hours depending on furnace size.
Energy consumption: 6,000–7,000 kWh/t
STEP 04
Cooling
Furnace allowed to cool naturally for 7–14 days. Rapid cooling would cause thermal stress fractures in the SiC crystal mass, degrading product quality and yield.
No forced cooling — patience preserves crystal integrity
STEP 05
Grading
Core zone: ≥97% SiC (Grade I, 6H crystal). Middle zone: Grade II (15R+4H, more impurities). Outer zone: unreacted mixture recovered and recycled into the next furnace cycle — zero waste.
This zoning creates the 6-grade product spectrum
STEP 06
Processing
Crushing → screening → acid washing → magnetic separation → hydraulic classification → laser PSD analysis. Five deep-processing lines ensure each grade meets its target purity, grit size, and bulk density specifications.
Final QC: ICP analysis + laser PSD + bulk density
Reaction 1 — Silicon Monoxide Formation
SiO₂ + C → SiO↑ + CO↑
Begins at ~1,400°C. Gaseous SiO migrates inward through the charge, reacting with excess carbon to form SiC crystals in the next reaction.
Reaction 2 — SiC Crystal Formation
SiO + 2C → SiC + CO↑
Occurs at 1,800–2,500°C. SiO gas reacts with surrounding carbon to nucleate and grow α-SiC (6H hexagonal) crystals — the final product.
Production Economics
Why Black SiC Costs Less — The Acheson Advantage
Black SiC’s cost advantage comes from simpler raw materials, lower energy consumption, and higher production yield. Understanding the economics explains why it dominates 70% of the SiC market.
Raw Materials & Energy
Black SiC requires only silica sand (SiO₂ ≥99%) and petroleum coke (fixed C ≥95%) — no NaCl catalyst, no high-purity specialty coke. The reaction occurs at 2,500°C over 36–48 hours in Acheson resistance furnaces. FerrumX’s location near abundant quartz deposits and low-cost hydroelectric/coal power ensures the most competitive energy cost structure in the industry.
Yield & Scale
Black SiC achieves higher furnace yield than green SiC because the absence of NaCl vaporization losses means more of the charge converts to usable product. The furnace core produces 97–99% SiC crystals, while outer zones yield 85–90% material — all of which is marketable across 6 grade tiers. Nothing is wasted. Five deep-processing lines handle crushing, milling, magnetic separation, acid leaching, and precision classification.
SiC Refractory Bricks+
Four Types of SiC Refractory Brick — Bonded by Different Mechanisms
SiC refractory bricks differ by bonding method — oxide-bonded, corundum-SiC, mullite-SiC, and nitride-bonded. Each type serves a distinct thermal, mechanical, and chemical environment. Select the right brick for your furnace.
| Brick Type | SiC (%) | Bulk Density | Porosity | CCS (MPa) | Service Temp (°C) | Application |
|---|---|---|---|---|---|---|
| Oxide-Bonded | ≥85 | ≥2.5 g/cm³ | ≤18% | ≥100 | ≥1,700 | Industrial furnace linings, CFBB, incinerators |
| Corundum-SiC | ≥70 | ≥2.6 g/cm³ | ≤20% | ≥100 | ≥1,700 | Aluminum furnace linings, flow channels |
| Mullite-SiC | ≥65 | ≥2.3 g/cm³ | ≤20% | ≥80 | ≥1,650 | Waste incinerators, thermal cycling zones |
| Si₃N₄-Bonded | ≥72 | ≥2.65 g/cm³ | ≤14% | ≥200 | ≥1,600 | Blast furnace tuyeres, iron troughs |
Key Advantages
Why Choose FerrumX Black Silicon Carbide
From raw material advantages to precision quality control — discover what makes FerrumX black SiC the preferred choice for industrial customers worldwide.
Extreme Hardness & Self-Sharpening
SiC promotes the formation of Type A graphite — the most desirable graphite form in gray iron — resulting in uniform distribution and improved mechanical properties.
Thermal & Chemical Stability
Maintains structural integrity at temperatures up to 1,900°C in air and 2,400°C in inert atmospheres. Resistant to oxidation, corrosion, and most acids and alkalis — ideal for refractory and metallurgical environments.
Full Grit Range & International Standards
From macro grits (F8–F220) for grinding wheels to micro powders (F230–F1500) for precision polishing. All products graded per FEPA, JIS (#240–#3000), or ANSI (6×10–80×180) standards with COA per shipment.
Scale & Custom Solutions
Two 40,000 KVA smelting furnaces with five deep-processing lines guarantee stable, scalable supply. Custom PSD, Ready-To-Press (RTP) granules, sintering additives, and OEM packaging available on request.
Dual-Certified Quality Management
FerrumX holds ISO 9001 (Quality Management) and ISO 45001 (Occupational Health & Safety) certifications. Every batch is traceable by batch number with full ICP and laser PSD analysis documentation.
Global Export & Logistics
Exporting to 50+ countries across Asia, Europe, the Americas, and the Middle East. Flexible packaging (25kg bags, 1-ton bulk bags, pallets), multimodal logistics, and customs documentation support for seamless international delivery.
Applications
Applications of Black Silicon Carbide
Black SiC serves as a critical raw material across eight major industries — from bonded abrasives and refractory monolithics to steelmaking deoxidation and advanced ceramics.
Bonded & Coated Abrasives
Grinding wheels, cutting discs, sandpaper, and blasting media for non-ferrous metals, stone, glass, and ceramics. Black SiC’s blocky, semi-friable crystals provide aggressive cutting with self-sharpening behavior.
Hardness: Mohs 9.2, Knoop 2480
Better toughness than green SiC for heavy grinding
Thermal conductivity: 50–100 W/m·K
Recommended: B-SiC 97–99 · F12–F220 → SiC Abrasives →
Refractory Materials
Tap hole clay, iron runner castables, ramming masses, and kiln furniture. SiC refractories last 2–3× longer than alumina-silicate alternatives and reduce energy consumption by 12–18%.
Stable to 1,900°C in air, 2,400°C inert
Low CTE: 4.0–4.5 × 10⁻⁶ /K
Resistant to thermal shock and slag
Recommended: B-SiC 90–98 · 0–5mm → SiC for Refractories →
Steelmaking Deoxidation
Combined Si/C deoxidizer and exothermic agent for induction furnaces, ladle furnaces, and BOF converters. Lower aluminum than FeSi, reducing Al₂O₃ inclusions.
Si recovery: 80–85%, C recovery: >90%
Exothermic: ΔH = −901.76 kJ/mol
10–20% cost savings vs ferrosilicon
Recommended: B-SiC 85–90 · 0–10mm → Metallurgical SiC →
Surface Treatment & Blasting
Sandblasting, shot peening, and surface texturing of metals, stainless steel, and glass. Angular grain shape provides aggressive cleaning and uniform surface profiling.
Recyclable: 6–10 passes before replacement
Lower dust generation than garnet
Uniform etching profile
Recommended: B-SiC 98–99 · F230–F1200 → SiC Powder →
Wire-Saw & PV Wafer Cutting
Standard photovoltaic wafer slicing — a cost-optimized alternative to green SiC for commercial solar manufacturing. Each GW of PV capacity requires ~1,000–1,200 t of SiC micro powder.
Standard choice for commercial PV
Cost: 60–70% of green SiC pricing
Adequate purity for standard silicon wafers
Recommended: B-SiC 95–97 · F16–F80
Structural & Wear Ceramics
Wear-resistant components, structural ceramics, kiln supports, and ceramic armor. SiC’s high thermal conductivity and mechanical strength enhance ceramic performance in demanding environments.
Flexural strength: 300–500 MPa
Wear resistance: 5–10× alumina
Ready-To-Press (RTP) granules available
Recommended: B-SiC 98–99 · custom shapes
Market Insights
Black Silicon Carbide Market & Industry Trends
The global black silicon carbide market is experiencing steady growth driven by demand from precision engineering, electronics manufacturing, and sustainable abrasive solutions.
Market Share by Application (2025)
$1.35B
2024 Market Size
$2.33B
2032 Projection
7.2%
CAGR 2025–2032
Key Growth Drivers
1. Precision Engineering Demand
Aerospace, automotive, and electronics industries require high-quality abrasives for tighter tolerances and superior surface finishes — driving demand for high-purity black SiC grits.
2. Semiconductor & EV Growth
Semiconductor wafer polishing and EV component manufacturing drive demand for fine black SiC powders (F500–F1500), with the fine powder segment growing at 5.5% CAGR.
3. Sustainable Manufacturing
Industries are adopting sustainable abrasives with longer tool life and lower energy consumption. Black SiC’s durability and recyclability align with green manufacturing goals.
4. Asia-Pacific Dominance
Asia-Pacific leads with 42.5% market share (China 25.8%), driven by massive steel manufacturing, electronics, and automotive industries in China, Japan, and South Korea.
FerrumX Advantage
The FerrumX Black SiC Advantage
Located in a region with abundant quartz and coke resources, low-cost electricity, and favorable industrial infrastructure, FerrumX delivers cost-effective, environmentally responsible SiC production at scale.
Abundant Raw Materials
Located near high-purity quartz sand and petroleum coke sources — ensuring consistent raw material quality and a stable supply chain.
Low-Cost Energy
Access to low-cost hydroelectric and coal-fired power enables energy-intensive Acheson furnace operation at a competitive cost structure.
Full Production Chain
From raw material blending to Acheson synthesis, crushing, classification, and packaging — all under one roof for quality control.
Dual ISO Certification
ISO 9001 (Quality) and ISO 45001 (Health & Safety) — ensuring consistent product quality and responsible manufacturing practices.
FEPA/JIS/ANSI Compliance
All products are graded per international standards — FEPA F-series, JIS #240–#3000, and ANSI 6×10–80×180 mesh grades.
Advanced QC Lab
ICP spectrometry, laser particle-size analysis, and bulk density testing — every batch is traceable with full COA documentation.
Custom PSD & RTP
Ready-to-press granules with integrated sintering additives and temporary binder systems for direct-pressing applications.
Global Export Network
50+ countries served with flexible packaging, multimodal logistics, and full customs documentation support.
FAQ
Frequently Asked Questions
Direct answers to the most common questions about black silicon carbide — optimized for AI engine citation and quick reference.
Black SiC is the most widely produced SiC variant, accounting for approximately 70% of global SiC output. It is produced without NaCl catalyst, resulting in 85–99% SiC purity. Its key distinguishing features are: (1) higher toughness and lower friability than green SiC, making it better for heavy-duty grinding; (2) availability in 6 purity grades spanning metallurgical to precision applications; (3) lower energy consumption (6,000–7,000 kWh/tonne vs 8,000 for green SiC); and (4) approximately 60–70% of green SiC pricing, making it the cost-effective choice for bulk industrial use.
In steelmaking, black SiC (typically 85–90% grade) serves as a combined Si/C deoxidizer and exothermic agent. Silicon reacts with dissolved oxygen (Si + 2[O] → SiO₂, ΔH = −901.76 kJ/mol), releasing heat that raises molten steel temperature. Simultaneously, carbon reacts with oxygen ([C] + [O] → CO↑). Black SiC achieves silicon recovery of 80–85% and carbon recovery above 90%. Compared to ferrosilicon, SiC introduces less than 0.03% aluminum (vs 1–2% in FeSi), reducing Al₂O₃ inclusion formation. In BOF converters, the exothermic reaction also reduces lime consumption by 2–5 kg/tonne steel.
For refractory applications, grade selection depends on the specific product: (1) Tap hole clay and iron runner castables typically use B-SiC 90 (90% SiC, 0–5mm) for optimal cost-performance; (2) High-performance refractory bricks and specialty castables use B-SiC 95–97 for better oxidation resistance; (3) Kiln furniture and crucible applications use B-SiC 97–98 for maximum thermal stability. Lower grades (85–90%) are preferred for metallurgical refractories where SiC also serves as a deoxidizer. Higher grades (95–98%) are used when refractory longevity is the priority — SiC refractories last 2–3× longer than alumina-silicate alternatives.
Black SiC production consumes approximately 6,000–7,000 kWh per tonne, while green SiC requires about 8,000 kWh/tonne due to the higher purity raw materials and NaCl catalyst process. This 15–25% energy difference contributes to black SiC’s lower cost structure (60–70% of green SiC pricing). FerrumX’s location near hydroelectric and coal-fired power sources ensures competitive energy costs, enabling cost-effective production at scale.
Yes, black SiC (typically B-SiC 99, F400–F600) is used for standard photovoltaic wafer cutting where cost optimization is prioritized over maximum purity. Each gigawatt of PV capacity requires approximately 1,000–1,200 tonnes of SiC micro powder. For premium applications requiring minimal metallic contamination (e.g., semiconductor-grade wafers), green SiC is preferred. Black SiC is the standard choice for commercial solar PV manufacturing where the balance of cost and performance favors it.
FerrumX offers flexible packaging for bulk supply: 25kg paper bags on pallets (1-ton pallets), 1-ton FIBC jumbo bags, and custom bulk containers. Standard lead time is 3–4 weeks for FOB orders. We support FOB, CIF, and DAP delivery terms with full customs documentation. Our 120,000 t/yr capacity and five deep-processing lines ensure stable supply for both spot orders and long-term contracts. Multi-language documentation and certificates of analysis (COA) are provided with each shipment.
Black SiC (Mohs 9.2, Knoop 2480) is significantly harder than aluminum oxide (Mohs 9.0, Knoop 2100), providing faster material removal and longer tool life on hard, brittle workpiece materials. SiC is preferred for grinding non-ferrous metals (copper, aluminum, brass), stone, glass, ceramics, and carbides. Al₂O₃ is preferred for ferrous metals (steel, iron) because SiC can react with iron at high grinding temperatures. SiC also has higher thermal conductivity (50–100 W/m·K vs ~30 for Al₂O₃), reducing thermal damage to the workpiece.
FerrumX is ISO 9001 (Quality Management) and ISO 45001 (Occupational Health & Safety) certified. Every batch undergoes ICP chemical analysis for SiC%, F.C.%, and Fe₂O₃% content, laser particle-size analysis for PSD verification, and bulk density measurement. All products are traceable by batch number with certificates of analysis (COA) provided per shipment. Products are graded per FEPA F-series (F8–F1500), JIS (#240–#3000), and ANSI (6×10–80×180) standards.
