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EN 1.4740 Stainless Steel vs. ACI-ASTM CA15 Steel

Both EN 1.4740 stainless steel and ACI-ASTM CA15 steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4740 stainless steel and the bottom bar is ACI-ASTM CA15 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 22
21
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 900
750
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1370
1500
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 18
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.5
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.0
Embodied Energy, MJ/kg 32
28
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 18
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 4.8
6.7

Alloy Composition

Carbon (C), % 0.3 to 0.5
0 to 0.15
Chromium (Cr), % 16 to 19
11.5 to 14
Iron (Fe), % 75.4 to 82.7
81.8 to 88.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040