ASTM A53 Gr.B Pipes

ASTM A53 pipe (also referred to as ASME SA53 pipe) is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and air lines.

The weld seam is heat treated after welding without untempered martensite remains. Also, the weld flash can be removed from both inner and outer surfaces.

It is suitable for welding, and suitable for forming operations involving coiling, bending, and flanging, subject to certain qualifications.

Grade and Chemical Composition (%)

Grade	C ≤	M ≤	P ≤	S ≤	Cu ≥	Ni ≤	Cr ≤	Mo ≤	V ≤
A	0.25	0.95	0.05	0.045	0.40	0.40	0.40	0.15	0.08
B	0.30	1.20	0.05	0.045	0.40	0.40	0.40	0.15	0.08

Mechanical Properties

Grade	Rm Mpa Tensile Strength	Mpa Yield Point	Elongation	Delivery Condition
A	≥330	≥205	20	Annealed
B	≥415	≥240	20	Annealed

Dimension Tolerances

Pipe Type	Pipe Sizes		Tolerances
Cold Drawn	OD	≤48.3mm	±0.40mm
	WT	≥60.3mm	±1%mm

• ASTM A53 Standard Specifications

Materials and Manufacture

The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding.
Applications: heat exchangers, condensers, heat transfer equipment and similar pipes.

Note:

• DN — Nominal Diameter
  
• NPS —Nominal Pipe Size