DIN EN 1.4404 Material X2CrNiMo17-12-2 Stainless Steel Datasheet, Properties, Welding, Equivalent

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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.

Chemical composition

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

Physical Properties

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.

Notes:

  • 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
Density (g/cm3) 8.0
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
Magnetic No
Modulus of elasticity
Value, Gpa Temperature, °C
200 20
194 100
186 200
179 300
172 400
165 500
Coefficient of thermal expansion, °C
Value, 10-6/K Temperature, °C
16.0 20-100
16.5 20-200
17.0 20-300
17.5 20-400
18.0 20-500

Mechanical Properties

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
10<t≤16 400 580-930 25
16<t≤40 190 500-830 30 100
40<t≤63 190 500-830 30 100
63<t≤160 190 500-700 40 100
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.

Heat Treatment

  • 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.

Applications

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
European Union US ISO China Japan
Standard Steel Name (Material Number) Standard Grade (UNS) Standard ISO name (ISO number) Standard Grade Standard Grade
EN 10088-2;
EN 10088-3
X2CrNiMo17-12-2 (1.4404) AISI SAE;
ASTM A959;
A240/A240M;
A276/A276M
316L (UNS S31603) ISO 15510 X2CrNiMo17-12-2 (4404-316-03-I) GB/T 20878;
GB/T 1220;
GB/T 3280
022Cr17Ni12Mo2;
00Cr17Ni14Mo2 (Old name)
JIS G4304 SUS316L

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