Posted in | Steels

Stainless Steel - 1.4057 QT 800

1.4057 is one of the most rounded stainless steel grades on the market and is an outstanding engineering material for demanding applications. It is a martensitic chromium alloy and has versatile thermodynamic properties and exceptional corrosion resistance.

1.4057 stainless steel is a widely-used engineering alloy for marine applications and is inherently resistant to salt water and scaling at continuous operating temperatures of 870 oC.

The tensile properties and high toughness of 1.4057 stainless steel are maintained in the quenched and tempered condition which makes it ideal for bolt and shaft applications.

Similar to other common stainless steel grades, it is resistant to chemical attack from a range of organic matter, corrosive elements and biological matter. Therefore 1.4057 stainless steel is uniquely suited for medical and food contact devices as well as for complex machinery in shipbuilding applications.

Benefits of Using 1.4057 Stainless Steel

  • Easy to machine into complex parts
  • Suitable for applications that are hygiene-critical
  • Good resistance to seawater and water of varying salt concentrations


Mechanical Properties of 1.4057

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Description 1.4057 Stainless Steel
Tensile Strength (MPa) <1000
Yield Strength (MPa) 1080
Elongation (% in 50mm) 20
Hardness (HB) <388
Impact Charpy V (J) 50 - 84


Chemical Composition of 1.4057

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UNS No S43100
AISI 431
Carbon (C) 0.12 – 0.22%
Chromium (Cr) 5 – 17%
Manganese (Mn) <1.0%
Nickel (Ni) 2.50%
Phosphorous (P) <0.04%
Silicon (Si) <1.0%

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