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ACI-ASTM CA40 Steel vs. EN 1.4971 Stainless Steel

Both ACI-ASTM CA40 steel and EN 1.4971 stainless 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 ACI-ASTM CA40 steel and the bottom bar is EN 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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