Sch 40 Alloy Hot Rolling Seamless Tube
2016-11-29 10:53:06 COMMENT：0 HITS：
Sch 40 Alloy Hot Rolling Seamless Tube Cross-section of the poor quality steel pipe is elliptical, because the manufacturers in order to save materials, the finished product before the two roll down the amount is too large, the strength of this steel greatly reduced, but also does not meet the external dimensions of screw steel standards.
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