牌號 | A437 Grade B4D |
---|---|
對應(yīng)標(biāo)準(zhǔn) | ASTM A437/A437M-2015
高溫加工用熱處理專用不銹鋼和合金鋼渦輪型螺栓 Stainless and alloy-steel turbine-type bolting specially heat treated for high-temperature service |
歸類 | 合金鋼 |
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