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Butt weld fittingsWrought butt-weld fittingsTG-MG-015 · Rev. 0 · October 2026

ASTM A420 WPL6 — Chemical Composition & Mechanical Properties

ASTM A420 WPL6 is an ASTM specification for wrought butt-weld fittings (UNS K03006). This sheet summarises its chemical composition limits and minimum mechanical properties. Typical use: low-temperature carbon steel piping to -46 °C.

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Chemical composition of ASTM A420 WPL6 (weight %)

C0.30 max
Mn0.50–1.35
P max0.035
S max0.040
Si0.15–0.40
Cr0.30 max
Ni0.40 max
Mo0.12 max

Other elements and limits: Cu 0.40 max; V 0.08 max; Nb 0.02 max

Mechanical properties

Tensile strength, min415 MPa
Yield strength, min240 MPa
Elongation, min22 %
HardnessNot specified

Heat treatment

Normalized, N&T, annealed or Q&T; Charpy V 17.6 J avg / 13.6 J min at -46 °C

Typical service

Low-temperature carbon steel piping to -46 °C

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 A420 WPL6: common questions

What is the minimum yield strength of ASTM A420 WPL6?

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

What is the carbon content of ASTM A420 WPL6?

0.30 max %.

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