A709 Grade 50W Corten Structural Steel for Bridges

‌ASTM A709 Grade 50‌ is an American standard bridge steel plate specified under the standard ‌ASTM A709/A709M‌. The thickness direction tensile properties (Z-direction properties) of ‌A709M Gr50 steel plate‌ can be customized to ‌Z15, Z25, and Z35‌ grades.

‌ASTM A709 Grade 50 Key Technical Notes‌

1. ‌Standard Compliance‌

   • Fully conforms to ASTM A709/A709M for bridge construction applications.

2. ‌Z-Direction Performance‌

   • ‌Z15/Z25/Z35‌ grades indicate through-thickness ductility levels (higher values = better resistance to lamellar tearing).

3. ‌Customization‌

   • Mechanical properties and testing protocols can be tailored per project requirements.

9 Grades Of ASTM A709/A709M Corten Weathering Steel

There are nine types of steel plates under the ASTM A709/A709M standard, of which four types have yield strength levels as follows:
A709Gr36 (250) 36 (250)
A709Gr50 (345) 50 (345)
A709Gr50S (345S) 50 (345)
A709Gr50W (HPS 345W) 50 (345)
HPS 50W (HPS 485W) 50 (345)
HPS 70W (HPS 485W) 70 (485)
A709Gr100 (690) 100 (6920)
HPS 100W (HPS 690W) 100 (6920)

The chemical composition analysis of A709Gr50 steel plate is as follows:
Carbon content C: ≤0.23
Silicon content Si: ≤0.40
Manganese content Mn: ≤1.35
Phosphorus content P: ≤0.04
Sulfur content S: ≤0.05
Nickel content Ni: ≤0.3
Niobium content Nb: 0.005-0.05
Vanadium content V: 0.01-0.15

The specifications of A709Gr50 steel plate are as follows:
10*2438*9144
12*2438*9144
14*2438*9144
16*2438*9144
20*2438*9144
25*2438*9144

A709GrHPS 50W, A709GrHPS 70W and A709GrHPS 100W steel grade should be produced by low hydrogen process, such as vacuum treatment, controlled heating of ingots and slabs, and slow cooling.

The flaw detection standard of A709Gr50 steel plate can be inspected according to domestic and foreign standards, such as JB4730, GB/T2970, A435, A577, A588, JISG0801, JISG0901, SEL072, BS5996 and NFS04-305, and the first, second and third level flaw detection requirements can be proposed.

A709Gr50 steel plate is widely used in the construction of bridges and other structures in practice.

1198.075 TONS A709 GR.345W CORTEN STEEL PLATE AND PIPE TO VIETNAM At 2019

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