| 钢砂选型表 steel grit specification | ||||||||||||||
| 国家标准局的筛子号码NO sieve designation | 标准（mm） sieve opening standard | 筛孔尺寸（英寸）nominal sieve opening ( inch) | 允许相应筛上物为最多和最少累计百分书的筛孔尺寸与筛号 SAEJ444标准 test sieve opening size and designation with maximum and minimum cumulative percentages allowed on corresponding test sieves SAEJ444 specification | |||||||||||
| G10 | G12 | G14 | G16 | G18 | G25 | G40 | G50 | G80 | G120 | G200 | G325 | |||
| 4 | 4.75 | (0.1870) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 5 | 4.00 | (0.1570) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 6 | 3.35 | (0.1320) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 7 | 2.80 | (0.1110) | All Pass | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 8 | 2.36 | (0.0937) | —— | All Pass | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 10 | 2.00 | (0.0787) | 80% | —— | All Pass | | —— | —— | —— | —— | —— | —— | —— | —— |
| 12 | 1.70 | (0.0661) | 90% | 80% | —— | All Pass | —— | —— | —— | —— | —— | —— | —— | —— |
| 14 | 1.40 | (0.0555) | —— | 90% | 80% | —— | All Pass | —— | —— | —— | —— | —— | —— | —— |
| 16 | 1.18 | (0.0469) | —— | —— | 90% | 75% | —— | All Pass | —— | —— | —— | —— | —— | —— |
| 18 | 1.00 | (0.0394) | —— | —— | —— | 85% | 75% | —— | All Pass | —— | —— | —— | —— | —— |
| 20 | 0.850 | (0.0331) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 25 | 0.710 | (0.0278) | —— | —— | —— | —— | 85% | 70% | —— | All Pass | —— | —— | —— | —— |
| 30 | 0.600 | (0.0234) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 35 | 0.500 | (0.0197) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 40 | 0.425 | (0.0165) | —— | —— | —— | —— | —— | 80% | 70% | —— | All Pass | —— | —— | —— |
| 45 | 0.355 | (0.0139) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— |
| 50 | 0.300 | (0.0117) | —— | —— | —— | —— | —— | —— | 80% | 65% | —— | All Pass | —— | —— |
| 80 | 0.180 | (0.0070) | —— | —— | —— | —— | —— | —— | —— | 75% | 65% | —— | All Pass | —— |
| 120 | 0.125 | (0.0049) | —— | —— | —— | —— | —— | —— | —— | —— | 75% | 60% | —— | All Pass |
| 200 | 0.075 | (0.0029) | —— | —— | —— | —— | —— | —— | —— | —— | —— | 70% | 55% | —— |
| 325 | 0.045 | (0.0017) | —— | —— | —— | —— | —— | —— | —— | —— | —— | —— | 65% | 20% |
| 符合国际标准（ISO）推荐的 corresponds to ISO recommendations | | | | | | | | | | |||||
| 项目item | 国家标准钢砂 national standard grit | |
  化 学 成 份 % | 碳 carbon | 0.85-1.20 |
| 硅 silicon | 0.40-1.20 | |
| 锰 manganese | 0.60-1.20 | |
| 硫 sulfur | <0.05 | |
| 磷 phosphorus | <0.05 | |
| 其他other | ||
| 硬度 | GP | HRC46-50 |
| GL | HRC56-60 | |
| GH | HRC63-65 | |
| 密度 density | ≥7.40 g/cm3 | |
| 金相组织 metallographic structure | 回火马氏体 tempered martensite | |
| 外观 appearance | 多角形 球状，半球状，扁平状颗 粒＜10％ 裂纹<40% | |
 筛网号 | 英寸 inch | 筛网 孔径 | SAE J444 钢砂 steel grit | |||||||||
| G10 | G12 | G14 | G16 | G18 | G25 | G40 | G50 | G80 | G120 | |||
| 6 | 0.132 | 3.35 | | | | | | | | | | |
| 7 | 0.111 | 2.80 | All Pass | | | | | | | | | |
| 8 | 0.0937 | 2.36 | | All Pass | | | | | | | | |
| 10 | 0.0787 | 2.00 | ≥80% | | All Pass | | | | | | | |
| 12 | 0.0661 | 1.70 | ≥90% | ≥80% | | All Pass | | | | | | |
| 14 | 0.0555 | 1.40 | | ≥90% | ≥80% | | All Pass | | | | | |
| 16 | 0.0469 | 1.18 | | | ≥90% | ≥75% | | All Pass | | | | |
| 18 | 0.0394 | 1.00 | | | | ≥85% | ≥75% | | All Pass | | | |
| 20 | 0.0331 | 0.850 | | | | | | | | | | |
| 25 | 0.0280 | 0.710 | | | | | ≥85% | ≥70% | | All Pass | | |
| 30 | 0.0232 | 0.600 | | | | | | | | | | |
| 35 | 0.0197 | 0.500 | | | | | | | | | | |
| 40 | 0.0165 | 0.425 | | | | | | ≥80% | ≥70% | | All Pass | |
| 45 | 0.0138 | 0.355 | | | | | | | | | | |
| 50 | 0.0117 | 0.300 | | | | | | | ≥80% | ≥65% | | All Pass |
| 80 | 0.007 | 0.180 | | | | | | | | ≥75% | ≥65% | |
| 120 | 0.0049 | 0.125 | | | | | | | | | ≥75% | ≥60% |
| 200 | 0.0029 | 0.075 | | | | | | | | | | ≥70% |
| GB | 2.5 | 2.0 | 1.7 | 1.4 | 1.2 | 1.0 | 0.7 | 0.4 | 0.3 | 0.2 | ||
