ASTM A709 GR 50W steel plate Technical requirements

katalor is the supplier of ASTM A709 GR 50W steel plate ,ASTM A709 GR 50W is one of popular steel applied to  Bridge industry. The bellowing is some detail information of ASTM A709 GR 50W steel plate

ASTM A709 GR 50W steel plate Melting ingredients （Wt％）

Grade

C

Si

Mn

P

S

Cu

Ni

Cr

Ti

V

Al

CE

ASTM A709 GR 50W

≤ 0.15

0.15 ～ 0.50

1.00 ～ 1.50

≤ 0.025

≤ 0.010

0.20 ～ 0.40

≤ 0.50

0.40 ～ 0.70

≤ 0.025

0.01 ～ 0.10

≥ 0.020

≤ 0.48

Note 1 The allowable deviation of the chemical composition of the finished steel should comply with the corresponding provisions of ASTM A709 / A709M-11. Note 2  The carbon equivalent is calculated as CE = C + Mn / 6 + (Cr + Mo + V) / 5 + (Cu + Ni) / 15. Note 3 Atmospheric corrosion index I = 26.01 (% Cu) +3.88 (% Ni) +1.20 (% Cr) +1.49 (% Si) +17.28 (% P) -7.29 (% Cu) (% Ni) -9.10 (% Ni) (% P) -33.39 (% Cu) 2 ≧ 6.0. Note 4 If necessary, a trace amount of Nb can be added to refine the austenite grains, and indicate the actual content in the warranty book.

ASTM A709 GR 50W steel plate Mechanical properties

Grade	thickness≤4in.(≤100mm)				thickness≤2in. (≤50mm)	thickness>2in.～4in. (>50～≤100mm)
	Yield point or yield strength ReL or Rp0.2(ksi) (MPa)	tensile strength Rm(ksi) (MPa)	Elongation A		10℉(-12℃) Average impact energy  KV8，（ft·lbf）	10℉(-12℃) Average impact energy KV8，（ft·lbf）
			L0=2in. (50mm) (％)	L0=8in. (200mm) (％)
ASTM A709 GR 50W	50～75.4 (345～520)	≥70 (≥485)	≥21	≥18	≥15 (≥20J)	≥20 (≥27J)
Note 1: Plate width greater than 24 in. (600mm) of steel, the elongation allowed to reduce 2%.

ASTM A709 GR 50W steel plate Technical requirements

Chemical composition (smelting composition) shall comply with the provisions of ASTM A709 / A709M-11
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