DIN EN 1.4404 Material X2CrNiMo17-12-2 Stainless Steel

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DIN EN 1.4404 Material X2CrNiMo17-12-2 Stainless Steel

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 %
StandardSteel name (Steel number)C ≤Si ≤Mn ≤P ≤S ≤CrNiMoN ≤
EN 10088-1X2CrNiMo17-12-2 (1.4404)0.031.002.000.0450.03016.5-18.510.0-13.02.00-2.500.10

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 = 1 Tonne/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
MagneticNo
Modulus of elasticity
Value, GpaTemperature, °C
20020
194100
186200
179300
172400
165500
Coefficient of thermal expansion, °C
Value, 10-6/KTemperature, °C
16.020-100
16.520-200
17.020-300
17.520-400
18.020-500

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.

StandardSteel Grade (Steel Number)Product ConditionThickness (mm), ≤0,2 % proof strength (Mpa), (Transverse)0,1 % proof strength (Mpa), (Transverse)Tensile strength (MPa)Elongation (%), < 3mm thickElongation %, ≥ 4mm thickImpact energy (J) KV2
> 10mm thick (Longitudinal)
Impact energy (J) KV2
> 10mm thick (Transverse)
EN 10088-2X2CrNiMo17-12-2 (1.4404)cold rolled strip8≥240≥270530-680≥40≥40
hot rolled strip13,5≥220≥260530-680≥40≥4010060
hot rolled plate75≥220≥260520-670≥45≥4510060

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)
StandardSteel Grade (Steel Number)Diameter (d) or Thickness (t) in mmHardness (HB)0.2% proof strength (N/mm2)1% proof strength (N/mm2)Tensile strength (N/mm2)Elongation (%)Impact energy (J)
EN 10088-3X2CrNiMo17-12-2 (1.4404)d≤160≤ 215≥ 200≥ 235500-70040 (Longitudinal)≥ 100 (Longitudinal)
160<t≤25030 (Transverse)≥ 60 (Transverse)
Mechanical properties for bright bars (solution annealed)
StandardSteel Grade (Steel Number)Diameter (d) or Thickness (t) in mm0.2% proof strength (N/mm2) ≥Tensile strength (N/mm2)Elongation (%) ≥Impact energy (J) ≥
EN 10088-3X2CrNiMo17-12-2 (1.4404)d≤10400600-93025
10<t≤16400580-93025
16<t≤40190500-83030100
40<t≤63190500-83030100
63<t≤160190500-70040100
160<t≤250190500-70030 (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 UnionUSAISOChinaJapan
StandardSteel Name (Material Number)StandardGrade (UNS)StandardISO name (ISO number)StandardGradeStandardGrade
EN 10088-2;
EN 10088-3
X2CrNiMo17-12-2 (1.4404)AISI SAE;
ASTM A959;
A240/A240M;
A276/A276M
316L (S31603)ISO 15510X2CrNiMo17-12-2 (4404-316-03-I)GB/T 20878;
GB/T 1220;
GB/T 3280
022Cr17Ni12Mo2;
00Cr17Ni14Mo2 (Old name)
JIS G4304SUS316L

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