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ASTM A131 steel plates

The ASTM A131 specification is the Standard Specification for Structural Steel plates primarily used in ship construction. Steel grades covered in this specification require CVN Impact testing and are classified by minimum Yield Strengths. Grades classified as Ordinary Strength have a minimum Yield Strength of 34 ksi and grades classified as Higher Strength have a minimum Yield Strength of 46 ksi. The Condition of Supply is determined by the ordered thickness and product type (plate, shapes and bars).

1.1 This specification covers structural steel plates, shapes, and bars intended primarily for use in ship construction.

1.2 Material under this specification is available in the following categories:

1.2.1 Ordinary Strength-Grades A, B, D, and E with a specified minimum yield point of 34 ksi [235 MPa], and

1.2.2 Higher Strength-Grades AH, DH, EH, and FH with a specified minimum yield point of 46 ksi [315 MPa], 51 ksi [350 MPa], or 57 ksi [390 MPa].

1.3 Shapes and bars are normally available as Grades A, B, AH32, and AH36. Other grades may be furnished by agreement between the purchaser and the manufacturer.

1.4 The maximum thickness of products furnished under this specification is 4 in. [100 mm] for plates and 2 in. [50 mm] for shapes and bars.

1.5 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.

1.6 Units-This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

Material under this specification is available in the following categories:

Grade ASTM A131 EH40 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥390 510-650 ≥19 ≥22 37 -40

Grade ASTM A131 FH40 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.16 0.10-0.50 0.90-1.60 0.025 0.025 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08 0.009
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥390 510-650 ≥19 ≥22 37 -60

Grade ASTM A131 AH40 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥390 510-650 ≥19 ≥22 37 0
Grade ASTM A131 DH40 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥390 510-650 ≥19 ≥22 31 -20
Grade ASTM A131 EH36 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥355 490-620 ≥19 ≥22 34 -40
Grade ASTM A131 FH36 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.16 0.10-0.50 0.90-1.60 0.025 0.025 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08 0.009
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥355 490-620 ≥19 ≥22 37 -60
Grade ASTM A131 AH36 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥355 490-620 ≥19 ≥22 34 0
Grade ASTM A131 DH36 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥355 490-620 ≥19 ≥22 34 -20
Grade ASTM A131 EH32 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥355 440-590 ≥19 ≥22 31 -40
Grade ASTM A131 FH32 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.16 0.10-0.50 0.90-1.60 0.025 0.025 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08 0.009
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥315 440-590 ≥19 ≥22 31 -60
Grade ASTM A131 AH32 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥315 440-590 ≥19 ≥22 31 0
Grade ASTM A131 DH32 C % Si % Mn % P % S % Al(acid soluble),min% Cb V Ti Cu Cr Ni Mo N
0.18 0.10-0.50 0.90-1.60 0.035 0.035 0.015 0.02-0.05 0.05-0.10 0.02 0.35 0.20 0.40 0.08
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥315 440-590 ≥19 ≥22 31 -20
Grade ASTMA131 D C % Si % Mn.Min % P % S % C+Mn/6
0.21 0.10-0.35 0.60 0.035 0.035 0.40
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥235 400-520 ≥21 ≥24 27 -20
Grade ASTMA131 E C % Si % Mn.Min % P % S % C+Mn/6
0.18 0.10-0.35 0.70 0.035 0.035 0.40
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥235 400-520 ≥21 ≥24 27 -40
Grade ASTMA131 B C % Si % Mn.Min % P % S % C+Mn/6
0.21 0.35 0.60 0.035 0.035 0.40
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥235 400-520 ≥21 ≥24 27 0
Grade ASTMA131 A C % Si % Mn.Min % P % S % C+Mn/6
0.21 0.50 2.5xC 0.035 0.035 0.40
Yield Strength (Mpa) Tensile Strength (MPa) Elongation in8 in.[200mm] (%) Elongation in8 in.[200mm] (%) Impact Energy (J) Test Temperature(°C)
≥235 400-520 ≥21 ≥24 27 20
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