- EN / Grade
- 1.4057
- Other designations / UNS
- 431 / X17CrNi16-2
UNS S43100 - Family
- Martensitic
A nickel-bearing martensitic grade
431 is used for shafts and machine components where strength, toughness and defined corrosion conditions are assessed together. Mention in marine applications does not establish suitability for every seawater condition. Describe actual loading alongside fluid, temperature and surface requirements.
Clarify heat-treatment condition and shaft acceptance
The grade name alone does not define one supplied hardness or quenched-and-tempered condition. State final diameter, working length, bearing contact surfaces and required straightness or runout acceptance. Subsequent welding or renewed heat treatment may require reassessing properties and dimensional condition.
If your enquiry uses the name 431F
1.4057 / S43100 are references used to identify grade 431. The commercial wording 431F does not automatically establish a sulfur-added free-machining grade. Check the complete drawing identity, product specification and machinability requirement together.
Typical application areas
Shafts, pump parts, glass mould and machine components.
Product and cutting options
Share the section and dimensions you require for this grade. Availability is assessed for each request; the catalogue does not represent live stock.
What to specify in your enquiry
- Grade designation and applicable material standard
- Section, finished dimensions and machining allowance
- Quantity, delivery condition and certificate requirements
Frequently asked questions
Can I request 1.4057 in cut lengths?+
Share your required section, dimensions and quantity. Our team will assess suitable supply and cutting options for the specific grade.
Are the listed grade designations interchangeable?+
Designation systems can overlap, but they do not make every specification identical. Use the exact standard and certificate requirements defined by your project.