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SAE-AISI 1146 Steel vs. S44725 Stainless Steel

Both SAE-AISI 1146 steel and S44725 stainless steel are iron alloys. They have 71% 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 1146 steel and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 17
22
Fatigue Strength, MPa 240 to 400
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
81
Shear Strength, MPa 410 to 440
320
Tensile Strength: Ultimate (UTS), MPa 670 to 730
500
Tensile Strength: Yield (Proof), MPa 360 to 630
310

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
3.1
Embodied Energy, MJ/kg 18
44
Embodied Water, L/kg 46
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 97
99
Resilience: Unit (Modulus of Resilience), kJ/m3 340 to 1050
240
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 26
18
Strength to Weight: Bending, points 22 to 23
18
Thermal Diffusivity, mm2/s 14
4.6
Thermal Shock Resistance, points 20 to 22
16

Alloy Composition

Carbon (C), % 0.42 to 0.49
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Iron (Fe), % 98.3 to 98.8
67.6 to 73.5
Manganese (Mn), % 0.7 to 1.0
0 to 0.4
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.040
Sulfur (S), % 0.080 to 0.13
0 to 0.020
Titanium (Ti), % 0
0 to 0.26