Carbon steel
Carbon steel is the common steel of industry: iron with up to about 0.35 % carbon, plus manganese and silicon, with no intentional additions of other elements. It costs less, welds well and serves most equipment between −29 °C and about 425 °C.
Carbon steel: alloys supplied by Dustre
Forms: Bar, Pipe, Forging and flange, Fitting, Plate. Click an alloy to see standards by form, composition, properties and equivalents.
| Material | UNS | W.Nr. / EN | Forms |
|---|---|---|---|
| ASTM A105 – Forged carbon steel for pipingCarbon steel · Carbon-manganese steel for forged flanges, fittings and valves | K03504 | ≈ P250GH | Bar, Pipe, Forging and flange, Fitting |
| ASTM A522 Type I – 9% Ni steelAlloy steel · Forged 9% nickel ferritic steel for cryogenic service down to −196 °C | K81340 | X8Ni9 | Bar, Plate, Pipe, Forging and flange, Fitting |
| ASTM A694 F65 – High-yield steel forgingCarbon steel · Forged carbon steel for high-pressure pipeline flanges and fittings | — | — | Pipe, Forging and flange, Fitting |
Did not find the alloy? See all materials or ask the technical team.
About carbon steel
On this page Dustre gathers the carbon steels it supplies as round bar and forgings to drawing: ASTM A105 for flanges, fittings and valves; ASTM A350 LF2 for low-temperature service, with Charpy at −46 °C; A522 Type I (9 % Ni) for cryogenics; and SAE 1020 and 1045 for general machined parts.
The difference between them lies in the control: A105 and LF2 are forgings with composition, heat treatment and tests defined by the standard and the certificate; the SAE grades are general-purpose steels with no mechanical test requirement.
See also
Frequently asked questions
A105 or LF2?
A105 for service between −29 °C and 425 °C. Below −29 °C, A350 LF2, which is normalized and impact tested at −46 °C.
What is carbon equivalent?
An index that estimates hardenability and weldability from the composition. In A105 it is a supplementary requirement (S4), 0.47 maximum for sections up to 2 in. Calculate it in the tool.
