Product \ Flat Bars \ Stainless Steel \ 1.4057

1.4057

EN/DIN

X17CrNi16-2

AISI/SAE/ASTM

431

The exact composition varies for martensitic stainless steel grades. Typically however, 1.4057 stainless steel will contain: 15 - 17 % chromium; 2% - 2.5% Nickel; 0.12 - 0.22% Carbon. It may also contain small amounts of silicon, molybdenum and phosphorus.

 

Chromium is the main alloying element of martensitic 1.4057 stainless steel, which inherently carries moderate corrosion resistance to a material with high strength and hardness . Normally, concentrations of 2 - 2.5 % nickel are added as a stabilizing element to ensure that a martensitic steel retains its toughness properties during heat treatment, which allows the manufacture of a range of component types.

 

1.4057 m artensitic stainless steels are often forgotten, perhaps because they are not in high demand compared to austenitic and ferritic grades. Yet they often play a large and often unseen role in modern infrastructure. The strength gained by heat treatment depends on the carbon content of the alloy. Increasing the carbon content increases the potential hardness and strength but decreases the toughness and ductility .

Higher carbon grades can be heat treated to a hardness of up to 60 HRC . Optimum corrosion resistance is achieved in the heat treated, hardened and tempered condition. Other martensitic grades were formed with additions of nickel and nitrogen, but have lower carbon levels than conventional grades. 431 (1.4057) stainless steels have better weldability , toughness and corrosion resistance.

 

Electrical Properties

Electrical Resistance

0 .60 x10 ^ -6 Ω .m

Maximum Temperature: Corrosion

400 ℃

Thermal conductivity

25 W / mK

 

 

Process Features

Processability

good

Hot Forming

good

Hardness HB

242

 

Thermal Recovery

Specific heat capacity

480 J / kg -K

Melting point

14 4 0 ℃

  Dimensions  mm
X17CrNi16-2      

 

Chemical Composition

Grade C Cr Mn P Si S Ni

1.4057

0.20 max

17 max

1.0 max 0.04 max 1.0 max 0.025 max 2.5 max

 

Physical Composition

It is used in the construction in the aerospace, marine, food, nitrogen, paper and food industries for particularly loaded parts of pumps, the production of screws, nuts, parts of valves of installations, shafts, sleeves or spindles.

 

Density

g/cm3

Specific heat capacity J/kg K Thermal conductivity W/m K

Electrical resistivity 

Ω mm2/m

7.7

430 25

0.6

 

Hardness HB 30

≤  HB

0.2%Yield Strength R ≥

 N/ mm2

Tensile strength R N/ mm2

Elongation A ≥ %

Modulus of elasticity

kN/mm2

320

520

700-800

15/12

200