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EN 1.4971 Stainless Steel vs. ACI-ASTM CA6N Steel

Both EN 1.4971 stainless steel and ACI-ASTM CA6N steel are iron alloys. They have 50% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
17
Fatigue Strength, MPa 270
640
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
75
Tensile Strength: Ultimate (UTS), MPa 800
1080
Tensile Strength: Yield (Proof), MPa 340
1060

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
740
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
23
Thermal Expansion, µm/m-K 15
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
11
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
2.5
Embodied Energy, MJ/kg 110
35
Embodied Water, L/kg 300
110

Common Calculations

PREN (Pitting Resistance) 38
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
180
Resilience: Unit (Modulus of Resilience), kJ/m3 280
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
38
Strength to Weight: Bending, points 23
30
Thermal Diffusivity, mm2/s 3.4
6.1
Thermal Shock Resistance, points 19
40

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.060
Chromium (Cr), % 20 to 22.5
10.5 to 12.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
77.9 to 83.5
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
6.0 to 8.0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 2.0 to 3.0
0