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S39274 Stainless Steel vs. SAE-AISI 1078 Steel

Both S39274 stainless steel and SAE-AISI 1078 steel are iron alloys. They have 62% of their average alloy composition in common. There are 32 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 S39274 stainless steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 17
11 to 14
Fatigue Strength, MPa 380
270 to 350
Poisson's Ratio 0.27
0.29
Reduction in Area, % 34
34 to 45
Shear Modulus, GPa 81
72
Shear Strength, MPa 560
440 to 470
Tensile Strength: Ultimate (UTS), MPa 900
730 to 780
Tensile Strength: Yield (Proof), MPa 620
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
49
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 24
1.8
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.3
1.4
Embodied Energy, MJ/kg 60
18
Embodied Water, L/kg 180
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 940
490 to 860
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32
26 to 28
Strength to Weight: Bending, points 26
23 to 24
Thermal Diffusivity, mm2/s 4.2
13
Thermal Shock Resistance, points 25
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.030
0.72 to 0.85
Chromium (Cr), % 24 to 26
0
Copper (Cu), % 0.2 to 0.8
0
Iron (Fe), % 57 to 65.6
98.5 to 99
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.8
0
Sulfur (S), % 0 to 0.020
0 to 0.050
Tungsten (W), % 1.5 to 2.5
0