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EN 1.4421 Stainless Steel vs. ACI-ASTM CA6N Steel

Both EN 1.4421 stainless steel and ACI-ASTM CA6N steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 31 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 1.4421 stainless steel and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11 to 17
17
Fatigue Strength, MPa 380 to 520
640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
1080
Tensile Strength: Yield (Proof), MPa 620 to 950
1060

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 870
740
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
23
Thermal Expansion, µm/m-K 10
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
2.5
Embodied Energy, MJ/kg 36
35
Embodied Water, L/kg 130
110

Common Calculations

PREN (Pitting Resistance) 18
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
180
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
38
Strength to Weight: Bending, points 26 to 30
30
Thermal Diffusivity, mm2/s 4.4
6.1
Thermal Shock Resistance, points 31 to 39
40

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 15.5 to 17.5
10.5 to 12.5
Iron (Fe), % 74.4 to 80.5
77.9 to 83.5
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 4.0 to 5.5
6.0 to 8.0
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.020