EN 1.4404 Stainless Steel (X2CrNiMo17-12-2)
EN 1.4404 material (stainless steel X2CrNiMo17-12-2) is a low-carbon version of 1.4401 (X5CrNiMo17-12-2), the maximum carbon content is only 0.03%, while 1.4401 is 0.07% maximum, so the weldability and corrosion resistance of 1.4404 stainless steel is better than 1.4401. The chemical composition of material 1.4404 and 1.4401 contain molybdenum (Mo), while EN 1.4301 (X5CrNi18-10) and 1.4307 (X2CrNi18-9) do not. Molybdenum improves the heat resistance of steel and resists pitting and crevice corrosion in environments containing chlorides or other halides.
EN 1.4404 Material Datasheet & Specification
The following tables and lists give the stainless steel 1.4404 datasheet including chemical composition, physical properties and mechanical properties etc.
DIN EN 1.4404 material chemical composition is listed in the following table.
|Chemical composition %|
|Standard||Steel name (Steel number)||C ≤||Si ≤||Mn ≤||P ≤||S ≤||Cr||Ni||Mo||N ≤|
|EN 10088-1||X2CrNiMo17-12-2 (1.4404)||0.03||1.00||2.00||0.045||0.030||16.5-18.5||10.0-13.0||2.00-2.50||0.10|
DIN 1.4404 material physical properties are given in the following lists, including density, thermal expansion, elastic modulus, thermal conductivity, specific heat capacity and electrical resistance.
- 10-6·K-1 = 10-6/K
- 1 Ω·mm²/m = 1 μΩ·m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1 kN/mm2
- 1 MPa = 1 N/mm2
|Thermal conductivity at 20 °C (W/m·K)||15|
|Specific heat capacity at °C (J/(Kg·K))||500|
|Electrical resistivity at 20 °C (μΩ·m)||0.75|
|Modulus of elasticity|
|Value, Gpa||Temperature, °C|
|Coefficient of thermal expansion, °C|
|Value, 10-6/K||Temperature, °C|
The following table gives the material 1.4404 mechanical properties in the solution-annealed condition for steel sheet, steel plate and steel strip.
|Standard||Steel Grade (Steel Number)||Product Condition||Thickness (mm), ≤||0,2 % yield strength (Mpa), (Transverse)||1 % yield strength (Mpa), (Transverse)||Tensile strength (MPa)||Elongation (%), < 3mm thick||Elongation %, ≥ 4mm thick||Impact energy (J) KV2|
> 10mm thick (Longitudinal)
|Impact energy (J) KV2|
> 10mm thick (Transverse)
|EN 10088-2||X2CrNiMo17-12-2 (1.4404)||cold rolled strip||8||≥240||≥270||530-680||≥40||≥40||–||–|
|hot rolled strip||13,5||≥220||≥260||530-680||≥40||≥40||100||60|
|hot rolled plate||75||≥220||≥260||520-670||≥45||≥45||100||60|
The following table gives the steel 1.4404 mechanical properties in solution annealed condition for semi-finished products, bars, rods, wires, profiles and bright products.
|Mechanical properties (solution annealed)|
|Standard||Steel Grade (Steel Number)||Diameter (d) or Thickness (t) in mm||Hardness (HB)||0.2% yield strength (N/mm2)||1% yield strength (N/mm2)||Tensile strength (N/mm2)||Elongation (%)||Impact energy (J)|
|EN 10088-3||X2CrNiMo17-12-2 (1.4404)||d≤160||≤ 215||≥ 200||≥ 235||500-700||40 (Longitudinal)||≥ 100 (Longitudinal)|
|160<t≤250||30 (Transverse)||≥ 60 (Transverse)|
|Mechanical properties for bright bars (solution annealed)|
|Standard||Steel Grade (Steel Number)||Diameter (d) or Thickness (t) in mm||0.2% yield strength (N/mm2) ≥||Tensile strength (N/mm2)||Elongation (%) ≥||Impact energy (J) ≥|
|EN 10088-3||X2CrNiMo17-12-2 (1.4404)||d≤10||400||600-930||25||–|
|160<t≤250||190||500-700||30 (Transverse)||60 (Transverse)|
DIN EN 1.4404 Welding
Compared to stainless steel 1.4401, it can be easily welded using a variety of conventional welding methods due to its extremely low carbon content and does not require annealing after welding.
- Hot forming: 1150 – 850 ℃ (cooling: air)
- Solution annealing: 1000 – 1100 ℃ (cooling: water, air)
Stainless Steel 1.4404 Hardening
Material 1.4404 can not be hardened by heat treatment but can be hardened by cold working.
1.4404 material is normally firstly processed into many intermediate products such as square steel, round steel, sheet steel, steel strip, steel rods and other forms of steel bars, etc., and then processed into finished products such as pipe fittings, angle steel, stainless steel wire mesh, decorative fabrics, filter element, filter cartridges, flanges, valves, elbows, watch straps, etc. are widely used in aerospace, petrochemical, architectural decoration, and daily necessities industries.
Equivalent Steel Grades
EN 1.4404 stainless steel (material X2CrNiMo17-12-2) is equivalent to the American standard ASTM AISI SAE; ISO, Japanese JIS and the Chinese GB standard (for reference).
|EN 1.4404 (X2CrNiMo17-12-2) material equivalent|
|Standard||Steel Name (Material Number)||Standard||Grade (UNS)||Standard||ISO name (ISO number)||Standard||Grade||Standard||Grade|
|X2CrNiMo17-12-2 (1.4404)||AISI SAE;|
|316L (UNS S31603)||ISO 15510||X2CrNiMo17-12-2 (4404-316-03-I)||GB/T 20878;|
00Cr17Ni14Mo2 (Old name)