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Butt weld fittingsWrought butt-weld fittingsTG-MG-012 · Rev. 0 · October 2026

ASTM A234 WPB — Chemical Composition & Mechanical Properties

ASTM A234 WPB is an ASTM specification for wrought butt-weld fittings (UNS K03006). This sheet summarises its chemical composition limits and minimum mechanical properties. Typical use: general carbon-steel piping, moderate & high temperature.

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Chemical composition of ASTM A234 WPB (weight %)

C0.30 max
Mn0.29–1.06
P max0.050
S max0.058
Si0.10 min
Cr0.40 max
Ni0.40 max
Mo0.15 max

Other elements and limits: Cu 0.40 max; V 0.08 max; Cu+Ni+Cr+Mo 1.00 max; Cr+Mo 0.32 max

Mechanical properties

Tensile strength, min415 MPa
Yield strength, min240 MPa
Elongation, min22 %
Hardness197 HBW

Heat treatment

Hot-formed (finished 620–980 °C) need not be heat treated; otherwise normalize, anneal or stress relieve

Typical service

General carbon-steel piping, moderate & high temperature

Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.

FAQ

ASTM A234 WPB: common questions

What is the minimum yield strength of ASTM A234 WPB?

240 MPa, with a minimum tensile strength of 415 MPa.

What is the carbon content of ASTM A234 WPB?

0.30 max %.

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