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EN 1.4971 Stainless Steel vs. SAE-AISI 1078 Steel

Both EN 1.4971 stainless steel and SAE-AISI 1078 steel are iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. 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 SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11 to 14
Fatigue Strength, MPa 270
270 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
72
Shear Strength, MPa 530
440 to 470
Tensile Strength: Ultimate (UTS), MPa 800
730 to 780
Tensile Strength: Yield (Proof), MPa 340
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
49
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
1.8
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.4
Embodied Energy, MJ/kg 110
18
Embodied Water, L/kg 300
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 280
490 to 860
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
26 to 28
Strength to Weight: Bending, points 23
23 to 24
Thermal Diffusivity, mm2/s 3.4
13
Thermal Shock Resistance, points 19
25 to 26

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.72 to 0.85
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
98.5 to 99
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
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 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0 to 0.050
Tungsten (W), % 2.0 to 3.0
0