A572 Grade 50 A572 Gr50 - ASTM A572/A572M-2018

牌号	A572 Grade 50
其他名稱
對應标準	ASTM A572/A572M-2018 高強度低合金钴釩結構鋼技術規範 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
歸類	合金鋼
性能	強度

A572 Grade 50 化學元素成分含量(%)

	成分	C	Si	Mn	P	S	Cu	Nb	更多
Type 1	最小值	-	0.15	-	-	-	-	0.005	/
Type 1	最大值	0.23	0.4	1.35	0.03	0.03	0.2	0.05	/

	成分	C	Si	Mn	P	S	Cu	V	更多
Type 2	最小值	-	0.15	-	-	-	-	0.01	/
Type 2	最大值	0.23	0.4	1.35	0.03	0.03	0.2	0.15	/

	成分	C	Si	Mn	P	S	Cu	V	Nb	更多
Type 3	最小值	-	0.15	-	-	-	-	0.01	0.005	V+Nb:0.02~0.15
Type 3	最大值	0.23	0.4	1.35	0.03	0.03	0.2	0.15	0.05	V+Nb:0.02~0.15

	成分	C	Si	Mn	P	S	Cu	N	Ti	V	更多
Type 5	最小值	-	0.15	-	-	-	-	0.003	0.006	-	/
Type 5	最大值	0.23	0.4	1.35	0.03	0.03	0.2	0.015	0.04	0.06	/

①For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum is permitted, up to a maximum of 1.60%
②錳Mn：0.75% min by product analysis shall be required for all plates t > 10 mm; ≥ 0.50% (≥ 0.45% by product analysis) shall be required for plates t ≤ 10 mm, and for all other products. The Mn to C ratio shall not be less than 2 to 1
③矽Si：For plates t > 40 mm and shapes with flange t > 75 mm; Si ≤ 0.40% for plates t < 40 mm and shapes with flange or leg t ≤ 75 mm
④銅Cu：When specified; Product analysis: 0.18% min
⑤釩V：Product analysis: 0.005 - 0.17%
⑥铌Nb：Product analysis: 0.004 - 0.06%
⑦釩V+铌Nb：Product analysis: 0.01 - 0.16%

碳當量計算

A572 Grade 50 機械性能

抗拉強度 σ_b Mpa	屈服點 σ_s Mpa	斷後伸長率或延伸率 δ %
≥450	≥345	≥18

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