The Stainless Steel Experts - MSTAINLESS

BUSINESS DIVISION
Industrial components
made of stainless steel
22
Mechanical and physical properties at a room temperature of 20°C
Material
no.
Mechanical and physical properties
Below is a list of the material grades of stainless steel most frequently processed by Modersohn:
Tensile
strength
Rm
N/mm²
mind.
Yield point
Rp 0.2 in delivered
state
without work
hardening,
N/mm² mind.
Elongation at
rupture A 5 in %
mind.
Modulus of elasticity
kN/mm² *1
(in acc.with approval
Z-30.3-6)
Thermal
conductivity
λw/m°C
Thermal expansion
coefficient at
20 - 200 °C
(20 - 400°C)
α x 10 - 6/°C
1.4062* 650 450 25 200 15 9,5 on request
1.4162* 650 450 30 200 16 13 on request
1.4482* 620 450 25 200 16 13 on request
1.4362 600 400 25 200 15 13 on request
1.4462 650 450 25 200 15 13 250 (300)
1.4410 760 550 25 200 14 13 250 (300)
1.4016 400 240 20 220 (170)* 1 25 10 400
1.4521 450 320 20 220 23 11 400
1.4305 500 190 35 200 15 16 450
1.4310 500 195 40 200 15 17 450
1.4301 500 190 45/35 (longit./transv.) 200 (170)* 1 15 16 450
1.4307 500 175 45/35 (longit./transv.) 200 (170)* 1 15 16 450
1.4541 500 190 40/30 (longit./transv.) 200 (170)* 1 15 16 500
1.4401 500 200 40/30 (longit./transv.) 200 (170)* 1 15 16 450
1.4404 500 200 40/30 (longit./transv.) 200 (170)* 1 15 16 450
1.4435 500 200 40/30 (longit./transv.) 200 15 16 450
1.4571 500 200 40/30 (longit./transv.) 200 (170)* 1 15 16,5 500
1.4439 580 280 35/30 (longit./transv.) 200 (170)* 1 14 16 450
1.4539 530 230 35/30 (longit./transv.) 195 (170)* 1 12 16 500
1.4529 650 300 40/35 (longit./transv.) 195 (170)* 1 12 16 500
1.4547 650 300 40/35 (longit./transv.) 195 (170)* 1 14 16,5 500
1.4828 500 230 30 200 15 (17,5) 1000
1.4841 550 230 30 200 15 (17) 1120
* New materials, provisional column values / factory data
*1 Values in brackets in compliance with the General Technical Approval
of the DIBt "Products, Connectors and Building Components of Noncorroding
Steel" dd. 20 April 2009. The lowering of the modulus of
elasticity values compared to factory and European standard values
is based on experiments performed in the run-up to the granting of
approval. During these tests it was established that the high tendency
of austenitic materials towards strain hardening can cause extreme
fluctuations in the modulus of elasticity values. The greater the level
of strain hardening, the greater the reduction in rigidity of the material
due to the change in the texture of the microstructure.
*2 Values for sustained exposure to max. temperature.
The strength values, in particular those of
the austenitic steel grades, decline considerably
as the temperature rises. The advantage of the
austenitic steel grades is their continued high
degree of strength even when exposed to high
temperatures. Please check the values for the
yield point and modulas of elasticity in the
material data sheets. While Duplex stainless
steel containing molybdenum actually becomes
stronger when exposed to higher temperatures
(high temperature strength), it tends to become
Max. recommended
operating temperature
in air up to °C *2
(permanent exposure)
brittle at temperatures exceeding 300°C. This is due
to the so called “475°C embrittlement”. There are
examples where heat exchangers have functioned
perfectly for many years even at temperatures of
350°C, but also individual cases where after approx.
30 – 40000h and temperatures exceeding
250°C significant brittleness in the weld joints has
been reported (source: Brücken 1997).
In terms of the recommended maximum operation
temperature the new Lean Duplex Steels without
molybdenum perform considerably better.