
Mr. Robin Gao
Tinggalkan pesanMr. Robin Gao
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name | high quality hot rolled cold drawn steel square bar | |||
material grade | q235,20cr,40cr | |||
sizes range | 8mm-80mm | |||
tolerance | 1-2% tolerance | |||
length | 3m,5.8m or 6m | |||
surface | black,bright | |||
test |
squash test, extended test, water pressure test, crystal rot test, heat treatment, ndt |
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chemical composition |
chemical composition | q235 | 20# | 45# |
c | 0.14~0.20% | 0.17~0.23 | 0.37~0.45 | |
mn | 0.30~0.65 | 0.35~0.65 | 0.50~0.80 | |
s | ≤0.050 | ≤0.035 | ≤0.035 | |
p | ≤0.045 | ≤0.035 | ≤0.035 | |
si | ≤0.30 | 0.17~0.37 | 0.17~0.37 | |
mechanical properties |
tensile strength | 380~400 | ≥410 | ≥580 |
yield strength | 235 | ≥245 | ≥335 | |
extension | 26% | ≥25 | ≥19 |
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