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Tianjin Lefin Industrial Co.,Ltd

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

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Tianjin Lefin Industrial Co.,Ltd.

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

OEM&ODM

Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.

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Iraq HOT DIP GALVANIZED STEEL PIPE

Iraq ASTM A500 GR.D

Standard: ASTM A500 Grade: GR.A, GR.B, GR.C, GR.D Outside diameter: 20-660MM Wall Thickness: 1.3-16MM Outside diameter: 20*20-1200*1200MM Wall Thickness: 1.3-50MM Outside diameter: 20*20-1500*1500MM Wall Thickness: 1.2-50MM The Wall Thickness Tolerance: The tolerance is within the standard limits Length: normally 5.8m, 6m, 12m or as your required Surface Treatment: Bare Finish, Painting, Oiling, Galvanization, 3PE, FBE coated......

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Product Description

ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. The highest grade (strength level) specified in ASTM A500 is: Grade D, This grade offers the highest mechanical properties among the available grades (A, B, C, and D) in ASTM A500.

Key Requirements For ASTM A500 Grade D
Mechanical Properties
Tensile Strength:
Minimum Tensile Strength: 58ksi (400 MPa)

Yield Strength:
Minimum Yield Strength: 36ksi(250MPa)

Elongation:
Minimum elongation in 2 inches (50.8 mm) varies based on wall thickness and tube shape but is generally ≥ 16% for structural applications.

Chemical Composition (Max % By Weight, Unless Range Is Given):
Carbon (C): ≤ 0.26%
Manganese (Mn): ≤ 1.35%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.035%
Copper (Cu): ≥ 0.20% (when copper steel is specified)

Manufacturing Process:
Tubes can be welded (electric-resistance welded, ERW) or seamless (SMLS).
Cold-forming is required to achieve mechanical properties.

Common Applications:
High-strength structural frameworks
Bridges, buildings, and construction supports
Machinery and heavy-load applications

Comparison With Other ASTM A500 Grades

Grade	Tensile Strength (min, ksi)	Yield Strength (min, ksi)	Elongation (% in 2 in.)
A	45	33	25
B	58	42	23
C	62	46	21
D(Highest)	58	36	23

Conclusion
ASTM A500 Grade D offers the highest strength among all ASTM A500 grades, making it ideal for demanding structural applications. Its high yield and tensile strength, combined with specific heat treatment requirements, ensure superior performance in heavy-duty environments .