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EN 1.4931 Steel vs. EN 1.4021 Stainless Steel

Both EN 1.4931 steel and EN 1.4021 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4931 steel and the bottom bar is EN 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11 to 17
Fatigue Strength, MPa 410
240 to 380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 810
630 to 880
Tensile Strength: Yield (Proof), MPa 620
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 600
760
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
30
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.9
1.9
Embodied Energy, MJ/kg 42
27
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 16
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 970
400 to 1160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
23 to 31
Strength to Weight: Bending, points 25
21 to 26
Thermal Diffusivity, mm2/s 6.5
8.1
Thermal Shock Resistance, points 22
22 to 31

Alloy Composition

Carbon (C), % 0.2 to 0.26
0.16 to 0.25
Chromium (Cr), % 11.3 to 12.2
12 to 14
Iron (Fe), % 83.2 to 86.8
83.2 to 87.8
Manganese (Mn), % 0.5 to 0.8
0 to 1.5
Molybdenum (Mo), % 1.0 to 1.2
0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0