40Cr合金管的化学成分(GB/T3077-1999)
C Si Mn Cr S P Ni Cu
0.37~0.45 0.17~0.37 0.50~0.80 0.80~1.10 ≤0.030 ≤0.030 ≤0.25 ≤0.030
40Cr合金管的临界温度
临界点 Ac1 Ac3 Ms 备注
温度(近似值)/℃ 780
770 840
805 350
328 1
2
1 用钢成分(%):0.38C,0.30Si,0.66Mn,0.95Cr,0.18Ni,0.016P,0.028S;
2 用钢成分(%):0.42C,0.29Si,0.69Mn,0.87Cr,0.14Ni,0.010P,0.013S。
40Cr合金管的弹性模量和切变模量
弹性模量E(20℃) /MPa 200000~211700
切变模量G(20℃) 80800
40Cr合金管的线(膨)胀系数
温度/℃ 20~200 20~300 20~400 20~500 20~600 20~700 备注
线(膨)胀系数/C-1 (11.9~12.0) ×10-6 (13.3~13.4)×10-6 (14.3~14.4)×10-6 (15.0~15.1)×10-6 (15.3~15.4)×10-6 (15.4~15.5)×10-6 1
2
1 用钢成分(%):0.37C,0.30Si,0.66Mn,0.95Cr,0.18Ni,0.016P,0.028S;
2 用钢成分(%):0.42