〔33〕合金工具钢(3) | ||||||||||||||
(Alloy Tool Steels(3)) | ||||||||||||||
标准代号 | 规格号码 | 记号 | 化学成分(%)Chemical composition | 机械性质(硬度) | ||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | V | Cu | 退火HB | 淬火HRC | |||
CNS | 2965 | SKT3 | 0.5-0.6 | ≦0.35 | 0.6-1.0 | ≦0.03 | ≦0.03 | 0.25-0.60 | 0.9-1.2 | 0.3-0.5 | ≦0.2 | ≦0.25 | ≦235 | ≧42 |
GB | 1299 | 5CrMnMo | 0.5-0.6 | 0.25-0.60 | 1.2-1.6 | ≦0.03 | ≦0.03 | 1.4-1.8 | 0.6-0.9 | 0.15-0.30 | - | - | 241-197 | ≧60 |
JIS | G4404 | SKD1 | 0.5-0.6 | ≦0.35 | 0.60-1.05 | ≦0.03 | ≦0.03 | 0.25-0.60 | 0.9-1.2 | 0.3-0.5 | ≦0.2 | ≦0.25 | ≦235 | ≧42 |
DIN | 17350 | 40MnMo7 | 0.35-0.45 | 0.2-0.4 | 1.3-1.6 | ≦0.035 | ≦0.035 | - | 1.8-2.1 | 0.15-0.25 | - | - | ≦230 | ≧46 |
CNS | 2965 | SKT4 | 0.5-0.6 | 0.1-0.4 | 0.6-0.9 | ≦0.03 | ≦0.02 | 1.5-1.8 | 0.8-1.2 | 0.20-0.25 | 0.05-0.15 | ≦0.25 | ≦248 | ≧42 |
GB | 1299 | 5CrNiMo | 0.5-0.6 | ≦0.4 | 0.5-0.8 | ≦0.03 | ≦0.03 | 1.4-1.8 | 0.5-0.8 | 0.15-0.30 | - | - | 241-197 | - |
JIS | G4404 | SKT4 | 0.5-0.6 | 0.1-0.4 | 0.6-0.9 | ≦0.03 | ≦0.02 | 1.5-1.8 | 0.8-1.2 | 0.20-0.25 | 0.05-0.15 | ≦0.25 | ≦248 | ≧42 |
ASTM | A681 | L6 | 0.65-0.75 | 0.1-0.5 | 0.25-0.80 | ≦0.03 | ≦0.03 | 1.25-2.00 | 0.6-1.2 | ≦0.5 | - | - | ≦235 | ≧58 |
DIN | 17350 | 55NiCrMo-V6 | 0.5-0.6 | 0.1-0.4 | 0.65-0.95 | ≦0.03 | ≦0.03 | 1.5-1.8 | 0.6-0.8 | 0.25-0.35 | 0.07-0.12 | - | ≦240 | ≧54 |