英国 · Lloyds

LR Type 420

LR:2016 — Rules for the Manufacture, Testing and Certification of Materials——Chapter 5 - Section 3:Steel Forgings - Forgings for shafting and machinery

化学成分

wt% · 对数刻度
0.010.11C0.45Cr0.4Cu0.3Mn0.3Mo0.15Ni0.4P0.035S0.035Si0.45
  • min – max 范围
  • 典型值

力学性能

按热处理状态分组
屈服强度 Rp0.2≥420 MPa抗拉强度 Rm600–750 MPa伸长率 A≥14 %伸长率 A≥18 %断面收缩率 Z≥35 %断面收缩率 Z≥50 %

化学成分

元素minmax相似备注
C0.45Alloy steelsAlloy steels
Cr0.4Alloy steelsAlloy steels
Cu0.3Alloy steelsAlloy steels
Mn0.3Alloy steelsAlloy steels
Mo0.15Alloy steelsAlloy steels
Ni0.4Alloy steelsAlloy steels
P0.035Alloy steelsAlloy steels
S0.035Alloy steelsAlloy steels
Si0.45Alloy steelsAlloy steels

力学性能

热处理 / 状态屈服强度抗拉强度伸长率断面收缩率冲击功硬度
Steel Forgings≥420 Alloy steels600–750 For main propulsion shafting forgings≥14 Tang.Alloy steels;≥18 Long.Alloy steels≥35 Tang.Alloy steels;≥50 Long.Alloy steels