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EN 1.4125 Stainless Steel vs. ACI-ASTM CA15 Steel

Both EN 1.4125 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 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4125 stainless steel and the bottom bar is ACI-ASTM CA15 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
21
Fatigue Strength, MPa 300
370
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 800
700
Tensile Strength: Yield (Proof), MPa 470
570

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 870
750
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
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 2.5
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
7.5
Density, g/cm3 7.7
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) 19
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
140
Resilience: Unit (Modulus of Resilience), kJ/m3 570
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
25
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 4.1
6.7
Thermal Shock Resistance, points 29
26

Alloy Composition

Carbon (C), % 1.0 to 1.2
0 to 0.15
Chromium (Cr), % 16 to 18
11.5 to 14
Iron (Fe), % 78 to 82.7
81.8 to 88.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.8
0 to 0.5
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.040