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Specifications
0Cr17Ni4Cu4Nbround steel
Dimensions: 6-300MM
17-4PH(630)
China standard:0Cr17Ni4Cu4Nb
American standard:630(S17400) AISI 630,ASTM 630
Germany standard:1.4542
England standard:X5CrNiCuNb16-4,
Japan standard:SUS630
Specification :Φ6~500MM(pole)
1.5~40×200~2000×500-6000MM(steel plate)
Features and use scope:
The steel grade of adding precipitation hardening type for copper.It uses to making axes,the parts of steam turbine.
China standard GB/T 1220-1992 Chemical composition(%)
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Cu |
Nb |
≤0.07 |
≤1.00 |
≤0.030 |
≤0.030 |
≤0.035 |
15.50~17.50 |
3.00~5.00 |
3.00~5.00 |
0.15~0.45 |
mechanical properties:
tensile strength σb (MPa):480°C aging,≥1310; 550°Caging,≥1060; 580°Caging,≥1000; 620°Caging,≥930
offset yield strength σ0.2 (MPa):480°Caging,≥1180;550°Caging,≥1000;580°Caging,≥865;620°Caging,≥725
extensibility δ5 (%):480°Caging,≥10;550°Caging,≥12;580°Caging,≥13;620°Caging,≥16
reduction of area ψ (%):480°Caging,≥40;550°Caging,≥45;580°Caging,≥45;620°Caging,≥50
hardness :solid solution,≤363HB and≤38HRC;480°Caging,≥375HB and≥40HRC; 550°Caging,≥331HB and≥35HRC;580°Caging,≥302HB and≥31HRC;620°Caging,≥277HB and≥28HRC
heat treatment regime and metallurgical structure:
heat treatment regime:1)solid solution1020~1060°C fast cooling;2)480°C aging,after solid solution,470~490°C air cooling; 3)550°C aging,after solid solution ,540~560°C air cooling ; 4)580°C aging,after solid solution,570~590°C air cooling;5)620°C aging,after solid solution,610~630°C air cooling
metallurgical structure:organization character is the type of precipitation hardening
delivery state :normal state is heat treatment,this should be shown on the contract,if not shown,we deliver the goods without heat treatment.
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