Q345D無縫管化學成分:
C:≤0.18 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.030 S:≤0.030 Ni:≤0.30
Cr≤0.30 Cu:≤0.20 Al:≥0.015 V:0.02-0.15
Nb:0.015-0.06
Q345B無縫管化學成分:
C:0.12-0.20 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.040
S:≤0.040 Ni:≤0.30 Cr:≤0.30 Cu:≤0.20 V:0.02-0.15
Nb:0.015-0.06
Q345A無縫管化學成分:
C:0.12-0.20 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.045
S:≤0.045 Ni:≤0.30 Cr:≤0.30 Cu:≤0.20 V:0.02-0.15
Nb:0.015-0.06
Q345C無縫管化學成分:
C:0.12-0.20 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.035
S:≤0.035 Ni:≤0.30 Cr:≤0.30 Cu:≤0.20 Al:≥0.015 V:0.02-0.15
Nb:0.015-0.06
Q345E無縫管化學成分:
C:≤0.18 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.025
S:≤0.025 Ni:≤0.30 Cr≤0.30 Cu:≤0.20 Al:≥0.015 V:0.02-0.15
Nb:0.015-0.06
Q345D無縫管力學性能:
抗拉強度:490-675屈服強度:≥345 伸長率:≥22
Q345B無縫管力學性能:
抗拉強度:490-675 屈服強度:≥345
伸長率:≥21
Q345A無縫管力學性能:
抗拉強度:490-675 屈服強度:≥345
伸長率:≥21
Q345C無縫管力學性能:
抗拉強度:490-675 屈服強度:≥345
伸長率:≥22
Q345E無縫管力學性能:
抗拉強度:490-675 屈服強度:≥345 伸長率:≥22