Stainless Steel
1.4057 (431) Bar

Datasheet Updated

05 August 2021

Range

Product FormConditionImperial SizesMetric Sizes
Round BarQT8001/8" - 6"4.0mm - 30.0mm
Round BarCondition P1/8" - 6"4.0mm - 30.0mm

Specifications

Commercial

431

EN

1.4057

A high chromium, low nickel high hardenability martensitic stainless steel.

Chemical Composition

Element % Present

Carbon (C)

0.00 - 0.20

Manganese (Mn)

0.00 - 1.00

Silicon (Si)

0.00 - 1.00

Phosphorous (P)

0.00 - 0.04

Sulphur (S)

0.00 - 0.03

Chromium (Cr)

15.00 - 17.00

Nickel (Ni)

1.25 - 2.50

Alloy Designations

  • DIN 1.4057
  • X17CrNi16-2
  • AISI 431
  • BS431S29

Supplied Forms

  • Bar

Applications

  • Marine systems
  • Pump & propeller shafts
  • Outboard motor driveshafts
  • Valve stems
  • Aircraft components
  • Axles
  • Fittings
  • Bolts & nuts

Characteristics

  • Considerable resistance to saltwater corrosion
  • Heat treatable martensitic stainless steel
  • High tensile and torsional strength and is well suited to shaft manufacture.
  • Welding is poor and cannot be easily cold worked

Mechanical Properties

Property Value

Elongation A50 mm

11 %

Tensile Strength

850-1000 MPa

Proof Stress

665 MPa

Hardness Brinell

248-302 HB

Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.