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EN 1.4031 Stainless Steel vs. ACI-ASTM CH20 Steel

Both EN 1.4031 stainless steel and ACI-ASTM CH20 steel are iron alloys. They have 75% 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 1.4031 stainless steel and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 13
38
Fatigue Strength, MPa 220 to 400
290
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 670 to 900
610
Tensile Strength: Yield (Proof), MPa 390 to 730
350

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
440
Maximum Temperature: Mechanical, °C 770
1100
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
14
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.9
3.7
Embodied Energy, MJ/kg 27
53
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 14
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
200
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 32
22
Strength to Weight: Bending, points 22 to 27
21
Thermal Diffusivity, mm2/s 8.1
3.7
Thermal Shock Resistance, points 23 to 32
15

Alloy Composition

Carbon (C), % 0.36 to 0.42
0 to 0.2
Chromium (Cr), % 12.5 to 14.5
22 to 26
Iron (Fe), % 83 to 87.1
54.7 to 66
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040