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Description

Germany DIN 1.4037 Stainless Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Stainless Steel: 1.4037
Category Type Steel Grade Standard Country Application
Steel GradesStainless Steel 1.4037 DIN Germany
1.4002
1.4003
1.4005
1.4006
1.4016
1.4021
1.4024
1.4028
1.4031
1.4034

Chemical composition(mass fraction)(wt.%) of the 1.4037

Chromium martensitic stainless steel of 1.4037, X65Cr13

C 0.58 – 0.70 Cr 12.50 – 14.50 S max. 0.015

Good corrosion resistance in moderately corrosive environments that are free of chlorides, such as soaps, detergents and organic acids. Good resistance to water and steam. 1.4037 is not resistant to intergranular corrosion in the as-delivered or as-welded conditions. Due to the precipitation of chromium carbides and the formation of chromium depleted regions adjacent to these precipitates, 1.4037 should not be used in the soft annealed or over tempered conditions if corrosion resistance is an issue. Optimal corrosion resistance is thus achieved in the hardened condition with a polished surface finish.

Relevant current and obsolete standards of 1.4037, X65Cr13

  • EN 10088-3 1.4037 X65Cr13
  • DIN 17440 1.4037 
  • SEW 400 X65Cr13

Special grades for particular applications wire drawing grade fine wire drawing grade

Special properties ferromagnetic grade hardenable to 60 HRC

properties of 1.4037, X65Cr13

  • density (kg/dm3 ) 7.70 
  • electrical resistivity at 20 °C (Ω mm2 /m) 0.55 

  • magnetizability yes 

  • thermal conductivity at 20 °C (W/m K) 30 

  • specific heat capacity at 20 °C (J/kg K) 460 

  • thermal expansion (K-1)

    • 20 – 100 °C: 10.5 x 10-6
    • 20 – 200 °C: 11.0 x 10-6 20 – 300 °C: 11.5 x 10-6 
    • 20 – 400 °C: 12.0 x 10-6


Typical applications

medical and pharmaceutical industry

mechanical engineering

cutlery, blade and tool industry

bearings


Processing properties

automated machining seldom

machinable yes

hammer and die forging seldom

cold forming yes

cold heading not common

suited to polishing yes


Conditions

annealed, tempered

Corrosion resistance (PRE = 12.5 – 14.5) Good corrosion resistance in moderately corrosive environments that are free of chlorides, such as soaps, detergents and organic acids. Good resistance to water and steam. 1.4037 is not resistant to intergranular corrosion in the as-delivered or as-welded conditions. Due to the precipitation of chromium carbides and the formation of chromium depleted regions adjacent to these precipitates, 1.4037 should not be used in the soft annealed or over tempered conditions if corrosion resistance is an issue. Optimal corrosion resistance is thus achieved in the hardened condition with a polished surface finish

Heat treatment and mechanical properties of 1.4037, X65Cr13 1.4037 can be soft annealed by holding at a temperature in the range 750 to 850 °C followed by slow cooling in an oven or in air. In this condition, the following mechanical properties can be expected: Property Specification tensile strength (N/mm2) Rm ≤ 800 hardness HB ≤ 245 The mechanical properties (d ≥ 160 mm) have to be agreed on for thicker dimensions, or the delivered product is based on the values given. Note: the HB values could be 60 units higher and the tensile strengths 150 N/mm2 higher due to cold work during straightening of profiles ≤ 35 mm. Due to the high hardenability of 1.4037, care must be taken to ensure that the tempering treatment is performed as soon as possible after the hardening treatment, whilst ensuring that the component has cooled to room temperature (to ensure that complete transformation to martensite has occurred). After hardening and stress relieving at 200 °C, the hardness should not exceed 60 HRC.

Welding Although 1.4037 is generally not welded, it can be soldered in some instances. Gradual heating to a temperature of about 800 °C is recommended prior to more rapid heating to a temperature of between 1150 °C and 1180 °C. Forging then takes place between 1180 °C – 950 °C followed by slow cooling in an oven or in dry ash or similar material to promote slow cooling.

Machining The machinability of this grade of stainless steel is directly related to its hardness. 1.4037 machines similar to carbon steels of the same hardness. Although it must be realised that the machining parameters will vary depending on the structure/hardness of the steel, the following parameters can be used as a guideline when machining with coated hardmetal tools:


Mechanical Properties of steel grade 1.4037

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
984 (≥) 381 (≥) 23 24 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade 1.4037

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
41 - -     0.23 -  
245 778 - 24.3 243   -  
631 - 42 41.2   324 324

Heat Treatment of steel grade 1.4037

Heat treated : 1676°C - 1615°C

Technological Curves of steel grade 1.4037


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