標(biāo)準(zhǔn):
GB/T3639---------中國國家標(biāo)準(zhǔn)
GB/T8713---------中國國家標(biāo)準(zhǔn)
用途:
用于機(jī)械結(jié)構(gòu)、液壓設(shè)備、液壓和氣動(dòng)缸筒的制造。
主要生產(chǎn)鋼管牌號:
10、20、35、45 等
經(jīng)協(xié)商,也可供應(yīng)其它牌號的鋼管。
機(jī)械性能:
牌號 | 交貨狀態(tài) | ||||||||
BK | BKW | BKS | NBK | ||||||
抗拉強(qiáng)度(MPa) | 伸長率(%) | 抗拉強(qiáng)度(MPa) | 伸長率(%) | 抗拉強(qiáng)度(MPa) | 伸長率(%) | 抗拉強(qiáng)度(MPa) | 伸長率(%) | 屈服強(qiáng)度(MPa) | |
≥ | |||||||||
10 | 410 | 6 | 375 | 10 | 335 | 12 | 335 | 24 | |
20 | 510 | 5 | 450 | 8 | 430 | 10 | 410 | 20 | |
35 | 590 | 4 | 550 | 6 | 520 | 8 | 530 | 17 | |
45 | 645 | 4 | 630 | 5 | 610 | 7 | 600 | 14 | |
40Cr | ≥784 | ≥12 | |||||||
37Mn5 | ≥784 | ≥12 |
化學(xué)成份:
牌號 | 化學(xué)成分% | |||||
C | Si | Mn | S | P | Cr | |
10 | 0.07-0.13 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | |
20 | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | |
35 | 0.32-0.39 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | |
45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | |
40Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | 0.08-1.10 |
25Mn | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | ≤0.035 | ≤0.035 | ≤0.25 |
37Mn5 | 0.30-0.39 | 0.15-0.30 | 1.20-1.50 | ≤0.015 | ≤0.020 |
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