ASTM A420 WPL6 — Chemical Composition & Mechanical Properties
ASTM A420 WPL6 is a low-temperature carbon steel (ltcs) grade for wrought butt-weld fittings (UNS K03006). This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures flanges and fittings in this grade.
ASTM A420 WPL6 at a glance
| Specification | ASTM A420 WPL6 |
|---|---|
| Material family | Low-temperature carbon steel (LTCS) |
| Product form | Wrought butt-weld fittings |
| UNS number | K03006 |
| Also known as | WPL6 |
| Document | TG-MG-015 · Rev. 1 · October 2026 |
Typical service
Low-temperature carbon steel piping to -46 °C
Heat treatment
Normalized, N&T, annealed or Q&T; Charpy V 17.6 J avg / 13.6 J min at -46 °C
Chemical composition of ASTM A420 WPL6 (weight %)
Other elements and limits: V 0.08 max; Nb 0.02 max
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 415 MPa |
|---|---|
| Yield strength, min | 240 MPa |
| Elongation, min | 22 % |
| Hardness | Not specified |
About low-temperature carbon steel (ltcs)
Low-temperature carbon steel (LTCS) is carbon–manganese steel with fine-grain practice and heat treatment chosen to keep its toughness in cold service. Every heat is Charpy impact-tested at the minimum design temperature, which is what separates LTCS from ordinary carbon steel.
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.
International equivalents of ASTM A420 WPL6
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A420 WPL6 · ASME SA-420 WPL6 |
| USA — UNS | K03006 |
| Europe — EN designation | P265NL (EN 10253-2) |
| Europe — W.Nr | 1.0453 |
| Japan — JIS | PL380 (JIS B2311) |
| China — GB / NB | 16MnDG / 16MnD |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
Same alloy in other product forms
| Product form | Specification / grade |
|---|---|
| Seamless pipe | ASTM A106 Gr.B |
| Wrought butt-weld fittings | ASTM A234 WPB |
| Seamless & welded pipe | ASTM A333 Grade 6 |
Other low-temperature carbon steel (ltcs) grades
Low-temperature carbon steel (LTCS) overviewStandards for ASTM A420 WPL6
All material standardsFAQ
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 %.
How is ASTM A420 WPL6 heat treated?
Normalized, N&T, annealed or Q&T; Charpy V 17.6 J avg / 13.6 J min at -46 °C.
What is the Chinese (GB) equivalent of ASTM A420 WPL6?
The nearest Chinese equivalent is 16MnDG / 16MnD. Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of ASTM A420 WPL6?
The nearest Japanese (JIS) equivalent is PL380 (JIS B2311).
Does Teshi Group supply ASTM A420 WPL6?
Teshi Group manufactures flanges and fittings in this grade. Send your size, rating and quantity to info@teshigroup.com for a quotation with EN 10204 3.1 certificates.
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