Stainless Steel Grade AISI 439 | EN 1.4510

Stainless steel AISI 439 | EN 1.4510 | DIN X3CrTi17 is a stabilized nickel-free grade. It is characterized by a high level of resistance to corrosion and oxidation, including sea water and high-concentration acids. This steel has a ferrite structure, which provides it with high resistance to intercrystalline corrosion. It has excellent physical and mechanical properties.

Physical properties

Table No. 1: physical properties of stainless steel grade AISI 439 | EN 1.4510 | DIN X3CrTi17
Density g/cm³	*Thermal conductivity at +20°C, W/mK**	*Specific heat capacity at +20°C, J/kgK**	*Specific electrical resistance at +20°C, μOhmm**	Magnetic properties
7,7	25	460	0,60	magnetic

Table No. 2: Physical properties of stainless steel grade AISI 439 | EN 1.4510 | DIN X3CrTi17
Temperature	+20°С	+100°С	+200°C	+300°С	+400°С	+500°С
Modulus of elasticity, GPa	220	215	210	205	195	-
Coefficient of linear expansion, 10^-6/°C	10,0	10,0	10,0	10,5	10,5	11,0

Technological properties

⓵ Welding

Stainless steel AISI 439 is quite easy to weld using all welding methods. Subsequent heat treatment is necessary to maintain corrosion properties at the welding site (including the heat-affected zone). It is carried out at 1050 - 1150 °C. The weld must be cleaned from the formed scale and passivated and etched with a special paste.

Mechanical properties

Table: mechanical properties of stainless steel grade AISI 439 | EN 1.4510 | DIN X3CrTi17
Tensile strength, min., MPa	501
Yield strength, 0.2%, MPa	205
Hardness (HB)	170
Relative elongation, min., %	40

Table: chemical composition of steel grade AISI 439 | EN 1.4510 | DIN X3CrTi17
Chemical composition of steel grade AISI 439 \| EN 1.4510 \| DIN X3CrTi17
C	Mn	Si	P	S	Ni	N	Cr	Ti	Cu	Fe
<0,07	<0,08	<0,08	<0,035	<0,025	<0,5	<0,04	17,0-19,0	<0,08	<0,3	Other

The balanced chemical composition of this grade of stainless steel provides excellent ductility and strength, and also forms its high resistance at elevated temperatures.

Application

AISI 439, due to its excellent physical and mechanical properties, is widely used:
- in the chemical and pharmacological industries;
- in the food, dairy, confectionery, bakery and brewing industries;
- in chimneys, exhaust ducts;
- in the production of housings for neutralization, recirculation and exhaust systems;
- in civil engineering and automotive engineering;
- in the production of heat exchangers;
- in the production of kitchen utensils and tableware;
- used for the production of tanks and containers for storing liquid and dry substances, etc.