A572 Grade 55

2023-05-17 18:03:12 來源：鋼鐵之家閱讀量：0

牌號(hào)	A572 Grade 55
其他名稱
對(duì)應(yīng)標(biāo)準(zhǔn)	ASTM A572/A572M-2018 高強(qiáng)度低合金鈷釩結(jié)構(gòu)鋼技術(shù)規(guī)范 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
歸類	合金鋼
性能	強(qiáng)度

A572 Grade 55 化學(xué)元素成分含量(%)

	成分	C ^③	Si ^①	Mn ^{② ③}	P ^④	S ^④	Cu	Nb ^⑤	更多
Type 1	最小值	-	0.15	-	-	-	-	0.005	/
Type 1	最大值	0.25	0.4	1.35	0.03	0.03	0.2	0.05	/

	成分	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	V ^⑥	更多
Type 2	最小值	-	0.15	-	-	-	-	0.01	/
Type 2	最大值	0.25	0.4	1.35	0.03	0.03	0.2	0.15	/

	成分	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	V ^⑥	Nb ^⑤	更多
Type 3	最小值	-	0.15	-	-	-	-	0.01	0.005	V+Nb：0.02~0.15⑦
Type 3	最大值	0.25	0.4	1.35	0.03	0.03	0.2	0.15	0.05	V+Nb：0.02~0.15⑦

	成分	C ^③	Si ^①	Mn ^{② ③}	P	S	Cu	N	Ti	V	更多
Type 5	最小值	-	0.15	-	-	-	-	0.003	0.006	-	/
Type 5	最大值	0.25	0.4	1.35	0.03	0.03	0.2	0.015	0.04	0.06	/

① Plates to 1-1/2 in. [40 mm] Thick, Shapes with Flange or Leg Thickness to 3 in. [75 mm] inclusive, Sheet Piling, Bars, Zees, and Rolled Tees: Si≤0.40% .
Plates Over 1-1/2 in. [40 mm] Thick and Shapes with Flange Thickness Over 3 in. [75 mm]：Si 0.15~0.40%.
② Manganese, minimum, by heat analysis of 0.80 % (0.75 % by product analysis) shall be required for all plates over 3/8 in. [10 mm] in thickness; a minimum of 0.50 % (0.45 % by product analysis) shall be required for plates 3/8 in. [10 mm] and less in thickness, and for all other products. The manganese to carbon ratio shall not be less than 2 to 1.
③ For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above the specified maximum is permitted. up to a maximum of 1.60 %.
④ maximum phosphorus content of 0.04 % and a maximum sulfur content of 0.05 % are permitted for the following materials： Structural shapes， Sheet piling， Bars， Plates with widlhs up to and including 15 in. [380 mm].
⑤ Nb：Product analysis limits = 0.004~0.06 %.
⑥ V：Product analysis limits = 0.005~0.17%
⑦ Nb+V：Product analysis limits = 0.01~0.16%.

碳當(dāng)量計(jì)算

A572 Grade 55 機(jī)械性能

抗拉強(qiáng)度 σ_b Mpa	屈服點(diǎn) σ_s Mpa	斷后伸長率或延伸率 δ %
≥485	≥380	(in 50mm) ≥20

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A572 Grade 55