Which grades of black silicon carbide are suitable for metal blasting?
Grades of Black Silicon Carbide Abrasive Grains
FEPA Standard: F8, F10, F12, F14, F16, F20, F24, F30, F36, F40, F46, F54, F60, F70, F80, F90, F100, F120, F150, F180, F220
JIS Standard: JIS #8, #10, #12, #14, #16, #20, #24, #30, #36, #46, #60, #70, #80, #90, #100, #120, #150, #180, #220
P Standard: P12, P16, P20, P24, P30, P36, P40, P50, P60, P80, P100, P120, P180, P220
Coarse-grade black silicon carbide abrasive grains for heavy rust removal, thick oxide scale stripping, old thick paint cleaning and large steel structures
Common sizes: 16#, 24#, 30#, 36#
Particle size: 0.5~1.2 mm
Applications: Heavy rust on carbon steel, casting sand removal, weld slag cleaning, thick coating stripping
Surface finish: High roughness Ra60~100 μm with ultra-strong adhesion, ideal for heavy anti-corrosion coating
Strict particle size requirements: No oversized agglomerates; oversize particles retained on sieve ≤5% to avoid deep groove scratches
Medium-grade black silicon carbide abrasive grains for general standard blasting (the most widely used type on the market)
Common sizes: 46#, 60#, 80#, 100#, 120#
Particle size: 0.14~0.4 mm
Applications: Pre-treatment of stainless steel, aluminum alloy, copper alloy, molds, auto parts and hardware; removal of light rust, machining tool marks and minor burrs
Surface finish: Uniform matte surface with Ra20~50 μm, standard roughness for painting and electroplating
Particle size requirements: Narrow particle size distribution with few oversized and undersized particles to ensure consistent blasting texture in mass production
Fine-grade black silicon carbide abrasive grains for precision matte finishing, light deburring, thin-walled parts and small aerospace components
Common sizes: 150#, 180#, 220#, 240#
Particle size: 45~106 μm
Applications: Ultra-thin stainless steel, precision aluminum alloy parts, titanium alloy and medical devices; only for matte surface finishing without damaging workpiece substrate
Surface finish: Delicate foggy surface with Ra3~15 μm, free of deep scratches
Particle size requirements: No oversized particles mixed in to prevent pitting on workpiece surfaces
Manufacturer of Black Silicon Carbide for Metal Blasting: Zhengzhou Haixu Abrasives Co., Ltd.
Contact: Wang Hui
Mobile / WeChat: +86 18039336686
Email: cassiel@zzhaixu.cn
