4140 Hot Rolled Heat Treated Round Bar Sizes through 7” comply with ASTM-A193-B7, ASME SA193 Class B7 and/or MIL-S-1222(B7). Sizes over 7” through 9” conform to ASTM A434 Class BC. keyinuo8@gmail.com Wechat:15617883392 https://www.vssteelbars.com/
JLC-80KW Metal Bar End Heating Induction Forging Furnace, widely used for bolts and nuts hot forging with high efficiency and much energy saving.
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