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EN 1.4971 Stainless Steel vs. ACI-ASTM CA40 Steel

Both EN 1.4971 stainless steel and ACI-ASTM CA40 steel are iron alloys. They have 45% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
310
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
10
Fatigue Strength, MPa 270
460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 800
910
Tensile Strength: Yield (Proof), MPa 340
860

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
750
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1500
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
25
Thermal Expansion, µm/m-K 15
10

Otherwise Unclassified Properties

Base Metal Price, % relative 70
7.5
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 7.6
2.0
Embodied Energy, MJ/kg 110
28
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 38
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
89
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 23
27
Thermal Diffusivity, mm2/s 3.4
6.7
Thermal Shock Resistance, points 19
33

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.2 to 0.4
Chromium (Cr), % 20 to 22.5
11.5 to 14
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
81.5 to 88.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.5
Nickel (Ni), % 19 to 21
0 to 1.0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.040
Tungsten (W), % 2.0 to 3.0
0