What material is 347H stainless steel?
347H is the American standard Astm standard steel grade, belongs to austenitic stainless steel hot strength steel, due to the chromium CR, nickel Ni, niobium Nb, its resistance to intergranular corrosion and polysulfuric acid intergranular stress corrosion is good, with high temperature strength and plasticity, good weldability, the steel has higher high temperature strength and high temperature oxidation resistance than 316, so it is often used as a hot strength steel.
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(More special steels can pay attention to me) common specifications of hot-rolled sheets, medium-thick open plates, hot-rolled round bars, light round bars, etc.
对应国标牌号：1CR19NI11NB
太钢执行标准：Astm A240/A240M-2019
Chemical Composition:
碳 C：0.04~0.10
锰 Mn:≤2.00
硅 Si:≤1.00
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铬 CR：17.00~19.00
镍 Ni：9.00~12.00
Phosphorus P: ≤0.045
Sulphur S: ≤0.030
铌 Nb:≤1.10
Mechanical Properties:
屈服强度RP0.2（Mpa）：≥205
抗拉强度PM（Mpa）：≥515
Elongation A (%): ≥30
Section shrinkage (%): ≥40
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