寶鋼Q390GJB和Q390GJC主要區別:
1、化學成分區別:兩者的微量元素Mn含量要求不同:Q390GJB:C ≤0.2 ,Si ≤0.55, Mn≤1.7 ,P≤0.025 ,S ≤0.015 ,Ni≤0.7,Cr ≤0.3 ,Mo ≤0.5 ,Cu≤0.3 ,Nb ≤0.07, V ≤0.2, Ti ≤0.03, Als≥0.015
Q390GJC:C≤0.2,Si≤0.55,Mn≤1.6 ,P≤0.025,S ≤0.015,Ni≤0.7,Cr≤0.3,Cu≤0.3,Nb0.015~0.06,V 0.02~0.2, Ti 0.010~0.03 ,Als≥0.015
Q390GJB中含有Mo,而Q390GJC中不含
2、物理效能區別:抗拉,屈服強度相同,但延展率不同
Q390GJB力學效能
YS:370 ~ 490;Rm:490 ~ 640;Akv≥ 47
Q390GJC力學效能
YS:370 ~ 490;Rm:490 ~ 650;Akv≥ 34
寶鋼Q390GJB和Q390GJC主要區別:
1、化學成分區別:兩者的微量元素Mn含量要求不同:Q390GJB:C ≤0.2 ,Si ≤0.55, Mn≤1.7 ,P≤0.025 ,S ≤0.015 ,Ni≤0.7,Cr ≤0.3 ,Mo ≤0.5 ,Cu≤0.3 ,Nb ≤0.07, V ≤0.2, Ti ≤0.03, Als≥0.015
Q390GJC:C≤0.2,Si≤0.55,Mn≤1.6 ,P≤0.025,S ≤0.015,Ni≤0.7,Cr≤0.3,Cu≤0.3,Nb0.015~0.06,V 0.02~0.2, Ti 0.010~0.03 ,Als≥0.015
Q390GJB中含有Mo,而Q390GJC中不含
2、物理效能區別:抗拉,屈服強度相同,但延展率不同
Q390GJB力學效能
YS:370 ~ 490;Rm:490 ~ 640;Akv≥ 47
Q390GJC力學效能
YS:370 ~ 490;Rm:490 ~ 650;Akv≥ 34