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A572 Grade 42簡介

牌號 A572 Grade 42
其他名稱
對應(yīng)標準 ASTM A572/A572M-2018
高強度低合金鈷釩結(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 強度
A572 Grade 42 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 /
最大值 0.21 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 /
最大值 0.21 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
最大值 0.21 0.4 1.35 0.03 0.03 0.2 0.15 0.05
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 - /
最大值 0.21 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)量計算
A572 Grade 42 機械性能
抗拉強度
σb
Mpa 		屈服點
σs
Mpa 		斷后伸長率或延伸率
δ
%
≥415 ≥290 (in 50mm)
≥24
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