45 # steel chemical composition
2009-12-09 10:06
The 20th Steel
Chemical composition mass fraction% | C: 0.17 ~ 0.23
Chemical composition mass fraction% | Si: 0.17 ~ 0.37
Chemical composition mass fraction% | Mn: 0.35 ~ 0.65
Chemical composition mass fraction% | Cr≤: 0.25
Chemical composition mass fraction% | Ni≤: 0.30
Chemical composition mass fraction% | Cu≤: 0.25
Recommended heat / ℃ | normalizing: 910
Recommended heat / ℃ | Quenching:
Recommended heat / ℃ | Tempering:
Mechanical properties | σb / MPa≥: 410
Mechanical properties | σs / MPa≥: 245
Mechanical properties | δ5 (%) ≥: 25
Mechanical properties | ψ (%) ≥: 55
Mechanical properties | AKU / J≥:
No. 45 Steel
Chemical composition mass fraction% | C: 0.42 ~ 0.50
Chemical composition mass fraction% | Si: 0.17 ~ 0.37
Chemical composition mass fraction% | Mn: 0.50 ~ 0.80
Chemical composition mass fraction% | Cr≤: 0.25
Chemical composition mass fraction% | Ni≤: 0.30
Chemical composition mass fraction% | Cu≤: 0.25
Recommended heat / ℃ | normalizing: 850
Recommended heat / ℃ | Hardening: 840
Recommended heat / ℃ | Tempering: 600
Mechanical properties | σb / MPa≥: 600
Mechanical properties | σs / MPa≥: 355
Mechanical properties | δ5 (%) ≥: 16
Mechanical properties | ψ (%) ≥: 40
Mechanical properties | AKU / J≥: 39
Delivery status hardness of steel HBS10 / 3000, ≤ | No heat treatment of steel: 229
Delivery status hardness of steel HBS10 / 3000, ≤ | annealed steel: 197 | 
