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AISI 431 / EN 1.4057 stainless steel

Steel AISI 431 / EN 1.4057 / 14KH17N2

Steel AISI 431 refers to high-temperature alloys ferritic-martensitic type. The main advantages of this steel grade:

·        high wear resistance;

·        high strength;

·        impact resistance;

·        resistance to corrosive acid and alkali-con-taining media.

Features

Hire of stainless steel this brand retains its characteristics over a wide temperature range. This allows the use of these alloys in any climatic zone. The high content of alloying elements ensures high resistance to corrosion of all types.

Steel of this brand is virtually not subject to "metal fatigue", which gives the opportunity to use it in structures with high load settings. The disadvantages include the difficulty in welding steel you need to "prepare" for this procedure, warming up to 200-300°C and using special welding electrodes for ferritic-martensitic alloys.

Application

Products from stainless steel AISI 431 is used to solve the widest range of applications. They are necessary for the production of elements of the pumping installations for the manufacture of shafts, turbines, valves shut-off type, ventilation systems, chimney pipes and so on.

 

The chemical composition of the steel 1.4057

C

Cr

Ni

      0,12-0,22        

        15,0-17,0       

      1,5-2,5       

Mechanical properties of the material 1.4057

Specification QT800

Properties

Typical

Specification

Tensile strength Rm, MRA

820

800-950

The yield strength Rp0. 2, MPa

620

600

Elongation, min.

20

14

Hardness, HB

-

25

 

 

 

Forms of delivery of products from steel AISI 431 / EN 1.4057

Round AISI 431 / EN 1.4057

Diameter: 6 – 500mm

Sheet  AISI 431 / EN 1.4057

Thickness: 0.5 mm – 100mm

Pipe  AISI 431 / EN 1.4057

-Hot rolled round pipe with a diameter from 38 to 244.5 mm, thickness from 3 to 25 mm

-Cold-drawn round tube

diameter from 6 to of 219.1 mm

with a thickness of 0.9 to 14.2 mm

Hexagon  AISI 431 / EN 1.4057

Diameter: 17-65mm

Stripe  AISI 431 / EN 1.4057

Thickness: 5-50mm ; Width: 50-250mm

Square AISI 431 / EN 1.4057

Size: 10-80mm