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Mechanical properties

Mechanical and physical properties at room temperature (20°C) Thermal
expansion
coefficient
at
20 - 200 °C
(20 - 400°C)
a x 10-6/°C		 Recommended
max. operation
temperature
in air up to °C,*1
Permanent
load
Mat. No. Tensile
strength
Rm
N/mm²
min.		 yield point
Rp 0.2 in
delivered
condition
without strain
hardening,
N/mm² min.		 Flexural
strength
A5 in %
min.		 Modulus of
elasticity
kN/mm²
(*2in compliance with
approval
Z-30.3-6)		 Thermal
conductivity
?w/m°C
1.4062 650 450 30 200 15 13 available on request
1.4162 650 450 30 200 16 13 available on request
1.4362 600 400 25 200 15 13 available on request
1.4462 650 450 25 200 15 13 250 (300)
1.4410 760 550 25 200 14 13 250 (300)
1.4003 450 260 20 170 25 10 400
1.4016 400 240 20 170*2 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
(longitudinal/transverse)		 170*2 15 16 450
1.4307 500 175 45 / 35
(longitudinal/transverse)		 170*2 15 16 450
1.4541 500 190 40 / 30
(longitudinal/transverse)
170*2 15 16 500
1.4401 500 200 40 / 30
(transverse)
170*2 15 16 450
1.4404 500 200 40 / 30
(longitudinal/transverse)		 170*2 15 16 450
1.4435 500 200 40 / 30
(longitudinal/transverse)		 200 15 16 450
1.4571 500 200 40 / 30
(longitudinal/transverse)		 170*2 15 16.5 500
1.4439 580 280 35 / 30
(longitudinal/transverse)		 170*2 14 16 450
1.4539 530 230 35 / 30
(longitudinal/transverse)		 170*2 12 16 500
1.4529 650 300 40 / 35
(longitudinal/transverse)		 170*2 12 16 500
1.4547 650 300 40 / 35
(longitudinal/transverse)		 170*2 14 16.5 500
1.4828 500 230 30 200 15 (17.5) 1000
1.4841 550 230 30 200 15 (17) 1120
*1 Values for continuous high-temperature stress. The strength values, in particular those of austenitic steel grades, are greatly reduced when exposed to high temperatures. The advantage of austenitic steel grades is their continued toughness, even when exposed to high temperatures. Please check the values for the yield point and modulus of elasticity in the material specification sheets. While duplex stainless steel actually becomes stronger when exposed to higher temperatures (high-temperature strength), it tends to become brittle at temperatures above 300°C. This is due to the so-called "475°C embrittlement". There are examples where heat exchangers have operated without any problem for many years at temperatures of 350°C, but also individual cases where weld joints have displayed high levels of embrittlement after approx. 30,000 – 40,000 hours and temperatures of more than 250°C (source: Brücken 1997).
*2 In compliance with the construction authority DIBt Approval 30.3-6, "Products, fasteners and components made of stainless steels". The lowering of 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 strong 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.
Keywords / Related terms: tensile strength, yield strength, yield point, notch impact strength, low-temperature strength, modulus of elasticity, ultimate load, holding load, torsion, flexural strength, high-strength steels