EN 1.4634 (X2CrAlSiNb18) Stainless Steel
Ferritic Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength540MPa
Yield Strength280MPa
Brinell HardnessUnknown
Maximum Service Temperature900°C
Chemical Composition
C
0 to 0.030%
CR
17.5 to 18.5%
NI
0 to 0.5%
MO
0 to 0.5%
MN
0 to 1.0%
SI
0.2 to 1.5%
P
0 to 0.050%
S
0 to 0.050%
CU
0 to 0.5%
NB
0.3 to 1.0%
AL
0.2 to 1.5%
FE
74.9 to 81.8%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
21 %
Fatigue Strength
180 MPa
Poisson's Ratio
0.28
Shear Modulus
77 GPa
Shear Strength
340 MPa
Tensile Strength: Ultimate (UTS)
540 MPa
Tensile Strength: Yield (Proof)
280 MPa
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
500 °C
Maximum Temperature: Mechanical
900 °C
Melting Completion (Liquidus)
1430 °C
Melting Onset (Solidus)
1390 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
21 W/m-K
Thermal Diffusivity
5.8 mm 2 /s
Thermal Expansion
10 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
2.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
3.0 % IACS
Calculated
PREN (Pitting Resistance)
19
Resilience: Ultimate (Unit Rupture Work)
93 MJ/m 3
Resilience: Unit (Modulus of Resilience)
200 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Environmental
Base Metal Price
13 % relative
Embodied Carbon
2.9 kg CO 2 /kg material
Embodied Energy
42 MJ/kg
Embodied Energy
42 MJ/kg 18 x 10 3 BTU/lb
Embodied Water
140 L/kg
Embodied Water
140 L/kg 16 gal/lb
Registered Designations & Aliases
1.4634EN 1.4634 (X2CrAlSiNb18) Stainless SteelX2CrAlSiNb18
Standards
EN 10088-1 EN 10088-1: Stainless steels - Part 1: List of stainless steels
EN 10088-2 EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
EN 10088-2 EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes Machining of Stainless Steels and Super Alloys: Traditional and Nontraditional Techniques, Helmi A. Youssef, 2016 EN 10088-1: Stainless steels - Part 1: List of stainless steels Corrosion of Stainless Steels, A. John Sedriks, 1996