Stainless Steel Grade AISI 304H | EN 1.4948

AISI 304H | EN 1.4948 | DIN X6CrNi18-11 is an austenitic grade of stainless chromium-nickel steel with a higher carbon content, which provides it with increased tensile strength and yield strength and makes this steel more suitable for use in elevated temperatures.

Due to its heat-resistant properties, the material is recommended for use in pressure vessels operating at temperatures above 525 °C.

Physical properties

Table No. 1: physical properties of stainless steel grade AISI 304H | EN 1.4948 | DIN X6CrNi18-11
Density g/cm³	7,9
*Specific heat capacity at +20°C, J/kgK**	450
*Thermal conductivity at +20°C, W/mK**	17
*Specific electrical resistance at +20°C, μOhmm**	0,71
Magnetic properties	non-magnetic

Table No. 2: physical properties of stainless steel grade AISI 304H | EN 1.4948 | DIN X6CrNi18-11
Temperature	+20°С	+100°С	+200°C	+300°С	+400°С	+500°С	+600°С	+700°С	+800°С
Modulus of elasticity, GPa	200	190	185	175	170	160	155	145	140
Coefficient of linear expansion, 10^-6/°C	16,3	16,3	16,9	17,3	17,8	18,2	18,5	18,7	-

Mechanical properties

Table: mechanical properties of stainless steel grade AISI 304H | EN 1.4948 | DIN X6CrNi18-11
Tensile strength, min., MPa	500-700
Yield strength, 0.2%, MPa	190-230
Relative elongation, min., %	30-40
Hardness, HB type	201

Table: chemical composition of AISI 304H | EN 1.4948 | DIN X6CrNi18-11
Chemical composition of steel grade AISI 304H \| EN 1.4948 \| DIN X6CrNi18-11
C	Si	Mn	P	S	Cr	Ni	N	Fe
0,04-0,08	<1,0	<2,0	<0,035	0,015	17,0-19,0	8,0-11,0	<0,11	Other

Application

AISI 304 H alloy is commonly used in the oil refining, gas and chemical industries, as well as industrial boilers, pressure vessels, heat exchangers, pipelines and condensers. This material is also used throughout the energy industry.