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SAE-AISI 1548 Steel vs. S40975 Stainless Steel

Both SAE-AISI 1548 steel and S40975 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1548 steel and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 250
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 16
22
Fatigue Strength, MPa 270 to 430
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Shear Strength, MPa 440 to 500
290
Tensile Strength: Ultimate (UTS), MPa 730 to 830
460
Tensile Strength: Yield (Proof), MPa 420 to 690
310

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
710
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
26
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.0
Embodied Energy, MJ/kg 19
28
Embodied Water, L/kg 47
95

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 99
93
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 1280
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 30
17
Strength to Weight: Bending, points 23 to 25
17
Thermal Diffusivity, mm2/s 14
7.0
Thermal Shock Resistance, points 23 to 27
17

Alloy Composition

Carbon (C), % 0.44 to 0.52
0 to 0.030
Chromium (Cr), % 0
10.5 to 11.7
Iron (Fe), % 98 to 98.5
84.4 to 89
Manganese (Mn), % 1.1 to 1.4
0 to 1.0
Nickel (Ni), % 0
0.5 to 1.0
Nitrogen (N), % 0
0 to 0.030
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
Titanium (Ti), % 0
0 to 0.75