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hot-rolled steel sheets and strips for automotive structures
1 main use
it is used for structural parts such as automobile girders, such as automobile girders that require good cold forming performance and high or high strength requirements, such as automobile structural parts such as automobile frames and wheels.
2 grades and standards
grade saph310~saph440 spfh540 spfh590 qste340tm~qste500tm; standard: technical agreement.
3 technical conditions of supply
3.1 product specifications
1.6～14×850～2000×c
3.2 mechanical properties
牌号 | 钢板厚度 | 拉伸试验 | 弯曲试验 | ||
mm | rel | rm | a | 弯心直径 | |
mpa | mpa | % | 180° | ||
saph310 | ＜8 | ≥185 | ≥310 | ≥33 | d=2a |
≥8 | ≥175 | ≥41 | d=2a | ||
saph370 | ＜8 | ≥225 | ≥370 | ≥33 | d=2a |
≥8 | ≥215 | ≥38 | d=2a | ||
saph400 | ＜8 | ≥255 | ≥400 | ≥31 | d=2a |
≥8 | ≥235 | ≥37 | d=2a | ||
saph440 | ＜8 | ≥295 | ≥440 | ≥29 | d=3a |
≥8 | ≥275 | ≥35 | d=3a | ||
spfh540 | ~ | ≥355 | ≥540 | ≥21 | d=3a |
spfh590 | ~ | ≥420 | ≥590 | ≥19 | d=3a |
qste340tm | ~ | ≥340 | ≥590 | ≥25 | d=0.5a |
qste380tm | ~ | ≥380 | ≥590 | ≥23 | |
qste420tm | ~ | ≥420 | ≥590 | ≥21 | |
qste460tm | ~ | ≥460 | ≥590 | ≥19 | d=1a |
qste500tm | ~ | ≥500 | ≥590 | ≥17 | |