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AISI 420 Stainless Steel vs. EN 1.4931 Steel

Both AISI 420 stainless steel and EN 1.4931 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 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 AISI 420 stainless steel and the bottom bar is EN 1.4931 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
240
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
17
Fatigue Strength, MPa 220 to 670
410
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
810
Tensile Strength: Yield (Proof), MPa 380 to 1310
620

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 620
600
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
24
Thermal Expansion, µm/m-K 10
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
11

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
8.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 28
42
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 14
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
970
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
29
Strength to Weight: Bending, points 22 to 41
25
Thermal Diffusivity, mm2/s 7.3
6.5
Thermal Shock Resistance, points 25 to 62
22

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.2 to 0.26
Chromium (Cr), % 12 to 14
11.3 to 12.2
Iron (Fe), % 82.3 to 87.9
83.2 to 86.8
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
1.0 to 1.2
Nickel (Ni), % 0 to 0.75
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
0 to 0.5
Vanadium (V), % 0
0.25 to 0.35