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SAE-AISI 1084 Steel vs. S39274 Stainless Steel

Both SAE-AISI 1084 steel and S39274 stainless 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 SAE-AISI 1084 steel and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 270
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 11
17
Fatigue Strength, MPa 320 to 370
380
Poisson's Ratio 0.29
0.27
Reduction in Area, % 28 to 45
34
Shear Modulus, GPa 72
81
Shear Strength, MPa 470 to 550
560
Tensile Strength: Ultimate (UTS), MPa 780 to 930
900
Tensile Strength: Yield (Proof), MPa 510 to 600
620

Thermal Properties

Latent Heat of Fusion, J/g 240
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
16
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
4.3
Embodied Energy, MJ/kg 19
60
Embodied Water, L/kg 46
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 89
140
Resilience: Unit (Modulus of Resilience), kJ/m3 700 to 960
940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 33
32
Strength to Weight: Bending, points 24 to 27
26
Thermal Diffusivity, mm2/s 14
4.2
Thermal Shock Resistance, points 25 to 30
25

Alloy Composition

Carbon (C), % 0.8 to 0.93
0 to 0.030
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 98.1 to 98.6
57 to 65.6
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0 to 0.050
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5