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  • 产品品牌: 新浦瑞
  • 钢丸产品描述
钢丸技术指标technical specification for steel shot
项目item 国家标准钢丸national standard steel shot 高质量钢丸high quality steel shot
化 
学 
成 
份 
%
Chemical composition
carbon碳C 0.85-1.20 0.10-0.20
silicon硅Si 0.40-1.20 0.10-0.35
 manganese锰Mn 0.60-1.20 0.35-1.50
sulfur硫S <0.05 <0.05
phosphorus磷P <0.05 <0.05
硬度hardness 钢丸steel shot HRC40-50
HRC55-62
HRC42-48
HRC48-54
密度density 钢丸steel shot ≥7.20 g/cm3 7.4g/cm3
金相组织metallographic structure 回火马氏体或屈氏体
tempered martensite or troostite
回火马氏体+贝氏体 复相组织tempered martensite + bainite  
complex phase structure
外观appearance 圆球形 rounded
hollow grain空心颗粒﹤10%
crack 裂纹颗粒<15%
圆球形 rounded
hollow grain空心颗粒﹤5% 
crack裂纹颗粒<10%
 
 
钢丸粒度分布表 steel shot grain distribution
筛网号sieve designation 
 
英寸 
inch
筛网 
孔径 
sieve opening
SAE J444 钢丸 steel shot
S930 S780 S660 S550 S460 S390 S330 S280 S230 S170 S110 S70
6 0.132 3.35 All Pass










7 0.111 2.80
All Pass









8 0.0937 2.36 ≥90%
All Pass








10 0.0787 2.00 ≥97% ≥85%
All Pass All Pass






12 0.0661 1.70
≥97% ≥85%
≤5%  All Pass





14 0.0555 1.40

≥97% ≥85%
≤5% All Pass




16 0.0469 1.18


≥97% ≥85%
≤5% All Pass



18 0.0394 1.00



≥96% ≥85%
≤5% All Pass


20 0.0331 0.850




≥96% ≥85%
≤10% All Pass

25 0.0280 0.710





≥96% ≥85%
≤10%

30 0.0232 0.600






≥96% ≥85%
All Pass
35 0.0197 0.500







≥97%
≤10%
40 0.0165 0.425








≥85%
All Pass
45 0.0138 0.355








≥97%
≤10%
50 0.0117 0.300









≥80%
80 0.007 0.180









≥90% ≥80%
120 0.0049 0.125










≥90%
200 0.0029 0.075











GB 2.8 2.5 2.0 1.7 1.4 1.2 1.0 0.8 0.6 0.4 0.3 0.2