Stainless Steel Grade AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20

AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20 - is an austenitic stainless steel that has excellent heat resistance characteristics (heat-resistant stainless steel) among chromium-nickel steels. The silicon content in it improves oxidation and carburization resistance.

However, it can become very brittle if exposed to temperatures of 649 - 816 °C for long periods of time.

Physical properties

Table No. 1: physical properties of stainless steel grade AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20
Density g/cm³	7,9
Magnetic properties	non-magnetic
*Thermal conductivity at +20°C, W/mK**	15
*Specific heat capacity at +20°C, J/kgK**	500
*Specific electrical resistance at +20°C, μOhmm**	0,85

Table No. 2: physical properties of stainless steel grade AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20
Temperature	+20°С	+200°С	+400°C	+600°С	+800°С	+1000°С
Coefficient of linear expansion, 10^-6/°C	17,0	17,0	18,0	18,5	19,0	19,5

Technological properties

Heat-resistant stainless steel of the US standard, grade AISI 314, is an analogue of steel EN 1.4841 | DIN X15CrNiSi25-20. It is used as parts of furnaces and furnace equipment, conveyor meshes, sheet parts of furnace rollers, suspensions, guides, supports, screens operated in air and hydrocarbon atmospheres, pipes of electrolysis and pyrolysis units.

⓵ Welding

Stainless steel AISI 314 is satisfactorily welded by all types of welding. Important: steel of this grade of stainless steel is prone to temper brittleness.

⓶ Operating temperature

Recommended operating temperature in air: 1000 °C. Temperature of the onset of intensive scale formation 1050 °C.

Mechanical properties

Table: mechanical properties of stainless steel grade AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20
Tensile strength, MPa	550 - 750
Yield strength, 0.2%, MPa	230
Relative elongation, min., %	30
Brinell hardness, HB type	223
Resistance to air up to ℃	1050-1150
Modulus of elasticity (kN/mm²)	196

Table: chemical composition of steel grade AISI 314 | EN 1.4841 | DIN X15CrNiSi25-20
Chemical composition of steel grade AISI 314 \| EN 1.4841 \| DIN X15CrNiSi25-20
С	Si	Mn	P	S	Cr	Ni	N	Fe
<0,02	1,5-2,5	<2,0	<0,045	<0,015	24,0 - 26,0	19,0 - 22,0	<0,11	Other

AISI 314 heat-resistant stainless steel is capable of maintaining all its original characteristics and mechanical properties over a long period of operation at high temperatures and in a complex stress state, while simultaneously withstanding the influence of an aggressive external environment.