Grades化学成分（熔炼分析）%
Chemical composition (ladle analysis)CSiMnPSAlt其它OthersQStE340TM≤0.12≤0.50≤1.30≤0.030≤0.025≥0.015Nb≤0.09 V≤0.20Ti≤0.15QStE380TM≤0.12≤0.50≤1.40≤0.030≤0.025≥0.015Nb≤0.09 V≤0.20Ti≤0.15QStE420TM≤0.12≤0.50≤1.50≤0.030≤0.025≥0.015Nb≤0.09 V≤0.20Ti≤0.15QStE460TM≤0.12≤0.50≤1.60≤0.030≤0.025≥0.015Nb≤0.09 V≤0.20Ti≤0.15QStE500TM≤0.12≤0.50≤1.70≤0.030≤0.025≥0.015Nb≤0.09 V≤0.20Ti≤0.15SAPH310≤0.10≤0.30≤0.50≤0.035≤0.035≥0.010-SAPH370≤0.21≤0.30≤0.75≤0.035≤0.035≥0.010-SAPH400≤0.21≤0.30≤1.40≤0.030≤0.025≥0.010-SAPH440≤0.21≤0.30≤1.50≤0.030≤0.025≥0.010-SAPH540≤0.15≤0.50≤1.80≤0.025≤0.025≥0.010-SAPH590≤0.18≤0.60≤2.00≤0.025≤0.025≥0.010-B440QK≤0.21≤0.35≤1.80≤0.030≤0.025≥0.010-B330CL≤0.10≤0.30≤0.50≤0.030≤0.025≥0.010-B380CL≤0.12≤0.30≤1.20≤0.030≤0.025≥0.010-B420CL≤0.12≤0.30≤1.50≤0.030≤0.025≥0.010-B320L≤0.10≤0.30≤0.50≤0.030≤0.035≥0.010-B420L≤0.12≤0.50≤1.50≤0.030≤0.025≥0.010-B510L≤0.16≤0.50≤1.60≤0.030≤0.025≥0.010-B510DL≤0.18≤0.30≤1.60≤0.025≤0.020≥0.010-B550L≤0.16≤0.50≤1.60≤0.030≤0.025≥0.010-B440QZR≤0.12≤0.50≤1.30≤0.030≤0.025--B480QZR≤0.16≤0.50≤1.50≤0.030≤0.035--为改善钢的性能，根据需要可添加其他合金元素，此时Alt的下限不要求。
The minimum aluminium content is not required if other alloyelements be added to improve the properties.力学性能牌号
Grades拉伸试验（纵向）
Tensile test(longitudinal)180°
弯曲试验
弯心直径
180°
Bend test
Inner diameter上屈服强度
Upper yield
strength
MPa抗拉强度
Tensile strength
MPa伸长率 Elongation %L0=80mm,b=20mmL0=5.65公称厚度 Nominal thicknessmm<3.0≥3.0QStE340TM≥340420~540≥19≥250.5aQStE380TM≥380450~590≥18≥23QStE420TM≥420480~620≥16≥21QStE460TM≥460520~670≥14≥191aQStE500TM≥500550~700≥12≥17
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Grades拉伸试验（横向）
Tensile test(transverse)180°
弯曲试验
弯心直径
180°
Bend test
Inner diameter下屈服强度
Lower yied strength
MPa抗拉强度
Tensile strength
MPa屈强比
Yied ratio伸长率
Elongation
L0=5.65 %B330CL≥225330~430-≥330aB380CL≥260,厚度（thickness）≤5.5mm380~480-≥320.5a≥235,厚度（thickness）
>5.5~10.0mm380~480-≥280.5a≥220,厚度（thickness）
>10.0~14.0mm380~480-≥250.5aB420CL≥290420~520-≥280.5aB440QZR≥320440~570-≥151aB480QZR≥355480~580-≥211aB320L≥215320~420-≥270aB420L≥305420~520-≥250.5aB510L≥355510~630-≥240.5aB510DL≥355510~630≤0.80≥241aB550L≥400550~670-≥231a
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Grades拉伸试验（横向）
Tensile test(transverse)180°
弯曲试验
弯心直径
180°
Bend test
Inner diameter上屈服强度
Upper yield
strength
MPa抗拉强度
Tensile
strength
MPa伸长率 % Elongation
L0=50mm,b=25mm公称厚度 Nominal thickness
mm公称厚度
Nominal thickness
mm1.6~<2.02.0~<2.52.5~<3.253.25~6.0<3.25≥3.25SPFH540≥355≥540≥21≥22≥23≥242a3aSPFH590≥420≥590≥19≥20≥21≥223a3a
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Grades拉伸试验（纵向）
Tensile strength(longitudinal)180°
弯曲试验
弯心直径
180°
Bend test
Inner diameter抗拉强度
Tensile
strength
MPa上屈服强度
Upper yield strength
MPa伸长率 %
Elongation
L0=50mm,b=25mm公称厚度 Nominal thickness
mm<6.06.0~
<8.0≥8.01.6~
<2.02.0~
<2.52.5~
<3.153.15~
<4.04.0~
<6.3≥6.3<2.0≥2.0SAPH310d≥310≥185≥185≥175≥33≥34≥36≥38≥40≥410a2aSAPH370≥370≥225≥225≥215≥32≥33≥35≥36≥37≥381a2aSAPH400≥400≥255≥235≥235≥31≥32≥34≥35≥36≥372a2aSAPH440≥440≥305≥295≥275≥29≥30≥32≥33≥34≥352a3a
