1.4057  ASTM 431 – SS2321

By using 1.4057 ( ≈ ASTM 431 – SS2321) you get a high tensile strength stainless steel resistant to strong oxidizing acids. The steel has good machinability and is used for e.g. shafts, spindles, piston rods, nuts and bolts. 1.4057 is weldable.

The steel grade 1.4057 ( also called ≈ ASTM 431 and SS2321) is a high tensile strength martensitic stainless steel with good machinability. The steel suits good for production of corrosion resistance details by machining, and where the steel needs to be resistive to strong oxidizing acids e.g. nitric acid. The steel is magnetic and in the quenched and tempered condition.

Some typical application areas for 1.4057:

• Pump- and Valve parts
• Shafting
• Spindels
• Piston rods
• Fittings
• Stirrers
• Bolts
• Nuts

Weldable steel and easy to machine
1.4057 is possible to weld and shall be welded with welding consumables similar to that of the parent one. The steel is generally easier to machine than ”conventional”  austenitic steels. The heat treatment condition of 1.4057 is QT 800 and it should be hot formed in the temperature range 1100-800°C. Slow cooling after hot forming.

Certificate
The steelworks has certificate as an approved material supplier of this steel grade from ABS, BV, DNV, GL and Lloyd’s.

We offer steel grade 1.4057 in the following profiles

Steel grade 1.4057  is available as machined round bar in the dimensions 16 – 170 mm.

If there is something you miss or wonder about you can always contact us to discuss your needs.