- Rui Zhang
Contents
ASTM A500is a standard issued by ASTM covering the requirements for cold formed welded and seamless carbon steel structural tubes. ASTM A500 is an important standard issued by the American Society for Testing and Materials (ASTM) that specifies the chemical composition, mechanical properties, and inspection and packaging requirements of ASTM A500.
ASTM A500 requires that structural steel tubing be made of carbon steel that meets specific chemical composition and mechanical property requirements. This helps to ensure that the pipe can withstand appropriate loads and pressures in a variety of engineering environments.
ASTM A500 Grade B/ Grade C Production Process
ASTM A500 covers two primarymanufacturing processes: cold-formed welding and seamless production.
Cold-formed welding involves the process of curving flat sheets into tube shapes and connecting them through welding. On the other hand, seamless tubing is formed directly into tube shapes without the need for welding.
These diverse manufacturing processes provide flexibility in meeting the requirements of different
ASTM A500 Steel Pipe Properties-Grade A,B,C,D
ASTM A500 has four steel grades A,B,C,D. Different steel grades correspond to different tensile and yield strengths, and carbon content is also different.
ASTM A500 grade Asteel has a tensile strength of 400MPa and a yield strength of 290MPa.
Grade Bsteel has a tensile strength and yield strength of 400MPa and 310MPa respectively.
Grade Csteel has a tensile strength and yield strength of 400MPa and 260MPa respectively.
Grade Dsteel has a tensile strength and yield strength of 400 MPa and 230 MPa respectively.
It can be seen that the tensile strength of ASTM A500 is the same, and the yield strength of grade B steel is the largest, followed by A500 Gr A/C/D.
These mechanical properties, carefully defined, ensure that the tubing will maintain its structural integrity under demanding
A500 Grade B vs C
- minimum yield strength
- minimum tensile strength
- Elongation(2 inches)
- Cost
- Availability
- 42000 vs 46000
- 58000 vs 62000
- 23% vs 21%
- Grade B < Grade C
- Grade B > Grade C
Note: Grade D tubing requires heat treatment at a temperature of at least 1100°F (590°C) for more than one hour per inch of thickness.
ASTM A500 Standard Dimensional Provisions
A500 Allowable Deviation of Outside Diameter
For the specified outside diameter of not more than 1.9in (48.3mm) of steel pipe, the change of the outside diameter shall not exceed 0.5%, the specific value shall not exceed 0.005in (0.13mm).
For tubes with specified outside diameters greater than 2.00in (50.8mm), the outside diameter shall not vary by more than 0.75 per cent to a value not exceeding 0.005in (0.13mm). Measurement of the outside diameter shall be taken at least 2in (50.8mm) from the end of the pipe.
ASTM A500 Wall Thickness - A500 Gr b,Gr c
The minimum wall thickness measured at any point of the tube shall not vary by more than 10 per cent from the specified wall thickness.
The maximum wall thickness measured at any point in the pipe, including the value measured at the weld seam, shall not vary by more than 10 per cent from the specified wall thickness.
ASTM A500 Pipe Length
Structural steel pipes are generally produced in any of a number of lengths from 1.5 metres upwards, varied or fixed.
A500 Tube Right Angle
The permissible variation in straightness of structural steel pipe is 10.4mm multiplied by 1/5 of the total length of the pipe in metres.
A500 Steel Pipe Corner
Each external corner of a square or rectangular steel pipe shall not exceed 3 times the specified wall thickness of the pipe.
A500 Steel Pipe Application Scenarios
A500 Construction
ASTM A500 Structural Tubing is widely used in construction to build all types of building structures. Its high strength and durability make it ideal for supporting stairs, frames and floor structures.
Bridge Construction
Bridge structures have extremely high requirements for durability and load capacity, and ASTM A500 structural tubes excel in this area.
Used in the manufacture of major bridge components such as cross and longitudinal girders, the high strength of ASTM A500 tube ensures reliable operation of bridges in a variety of environmental conditions.e
Communication Towers and Support Structures
Communication towers and support structures require strong materials that can withstand wind and heavy loads, and ASTM A500 structural tubing plays a key role in these demanding applications, ensuring that communication equipment is securely supported while meeting stringent requirements for structural strength and stability.
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