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EN 1.4421 Stainless Steel vs. EN 1.4634 Stainless Steel

Both EN 1.4421 stainless steel and EN 1.4634 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4421 stainless steel and the bottom bar is EN 1.4634 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
21
Fatigue Strength, MPa 380 to 520
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
540
Tensile Strength: Yield (Proof), MPa 620 to 950
280

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
500
Maximum Temperature: Mechanical, °C 870
900
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.9
Embodied Energy, MJ/kg 36
42
Embodied Water, L/kg 130
140

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
93
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
20
Strength to Weight: Bending, points 26 to 30
19
Thermal Diffusivity, mm2/s 4.4
5.8
Thermal Shock Resistance, points 31 to 39
19

Alloy Composition

Aluminum (Al), % 0
0.2 to 1.5
Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
17.5 to 18.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 74.4 to 80.5
74.9 to 81.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.7
0 to 0.5
Nickel (Ni), % 4.0 to 5.5
0 to 0.5
Niobium (Nb), % 0
0.3 to 1.0
Phosphorus (P), % 0 to 0.035
0 to 0.050
Silicon (Si), % 0 to 0.8
0.2 to 1.5
Sulfur (S), % 0 to 0.020
0 to 0.050