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EN 1.4938 Stainless Steel vs. ACI-ASTM CA15M Steel

Both EN 1.4938 stainless steel and ACI-ASTM CA15M steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 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 1.4938 stainless steel and the bottom bar is ACI-ASTM CA15M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
20
Fatigue Strength, MPa 390 to 520
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
690
Tensile Strength: Yield (Proof), MPa 640 to 870
510

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 750
760
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
27
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
2.1
Embodied Energy, MJ/kg 47
29
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 18
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
25
Strength to Weight: Bending, points 26 to 29
22
Thermal Diffusivity, mm2/s 8.1
7.2
Thermal Shock Resistance, points 30 to 35
25

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.15
Chromium (Cr), % 11 to 12.5
11.5 to 14
Iron (Fe), % 80.5 to 84.8
82.1 to 88.4
Manganese (Mn), % 0.4 to 0.9
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
0.15 to 1.0
Nickel (Ni), % 2.0 to 3.0
0 to 1.0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.65
Sulfur (S), % 0 to 0.015
0 to 0.040
Vanadium (V), % 0.25 to 0.4
0