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SAE-AISI 1078 Steel vs. S45000 Stainless Steel

Both SAE-AISI 1078 steel and S45000 stainless steel are iron alloys. They have 76% 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 SAE-AISI 1078 steel and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 14
6.8 to 14
Fatigue Strength, MPa 270 to 350
330 to 650
Poisson's Ratio 0.29
0.28
Reduction in Area, % 34 to 45
22 to 50
Shear Modulus, GPa 72
76
Shear Strength, MPa 440 to 470
590 to 830
Tensile Strength: Ultimate (UTS), MPa 730 to 780
980 to 1410
Tensile Strength: Yield (Proof), MPa 430 to 570
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
840
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
17
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.8
Embodied Energy, MJ/kg 18
39
Embodied Water, L/kg 45
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 90
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 860
850 to 4400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 28
35 to 50
Strength to Weight: Bending, points 23 to 24
28 to 36
Thermal Diffusivity, mm2/s 13
4.5
Thermal Shock Resistance, points 25 to 26
33 to 47

Alloy Composition

Carbon (C), % 0.72 to 0.85
0 to 0.050
Chromium (Cr), % 0
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Iron (Fe), % 98.5 to 99
72.1 to 79.3
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0
5.0 to 7.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030