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EN 1.4945 Stainless Steel vs. ACI-ASTM CA40 Steel

Both EN 1.4945 stainless steel and ACI-ASTM CA40 steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19 to 34
10
Fatigue Strength, MPa 230 to 350
460
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 640 to 740
910
Tensile Strength: Yield (Proof), MPa 290 to 550
860

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 520
390
Maximum Temperature: Mechanical, °C 920
750
Melting Completion (Liquidus), °C 1490
1440
Melting Onset (Solidus), °C 1440
1500
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 30
7.5
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 5.0
2.0
Embodied Energy, MJ/kg 73
28
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 23
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
89
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 25
33
Strength to Weight: Bending, points 20 to 22
27
Thermal Diffusivity, mm2/s 3.7
6.7
Thermal Shock Resistance, points 14 to 16
33

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.2 to 0.4
Chromium (Cr), % 15.5 to 17.5
11.5 to 14
Iron (Fe), % 57.9 to 65.7
81.5 to 88.3
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 15.5 to 17.5
0 to 1.0
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.040
Tungsten (W), % 2.5 to 3.5
0