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S45503 Stainless Steel vs. SAE-AISI 4145 Steel

Both S45503 stainless steel and SAE-AISI 4145 steel are iron alloys. They have 77% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S45503 stainless steel and the bottom bar is SAE-AISI 4145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 410 to 500
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 4.6 to 6.8
16
Fatigue Strength, MPa 710 to 800
240
Poisson's Ratio 0.28
0.29
Reduction in Area, % 17 to 28
46
Rockwell C Hardness 46 to 54
33
Shear Modulus, GPa 75
73
Shear Strength, MPa 940 to 1070
360
Tensile Strength: Ultimate (UTS), MPa 1610 to 1850
580
Tensile Strength: Yield (Proof), MPa 1430 to 1700
360

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.4
1.5
Embodied Energy, MJ/kg 48
20
Embodied Water, L/kg 120
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 110
80
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 57 to 65
21
Strength to Weight: Bending, points 39 to 43
20
Thermal Shock Resistance, points 56 to 64
17

Alloy Composition

Carbon (C), % 0 to 0.010
0.43 to 0.48
Chromium (Cr), % 11 to 12.5
0.8 to 1.1
Copper (Cu), % 1.5 to 2.5
0
Iron (Fe), % 72.4 to 78.9
96.7 to 97.7
Manganese (Mn), % 0 to 0.5
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 7.5 to 9.5
0
Niobium (Nb), % 0.1 to 0.5
0
Phosphorus (P), % 0 to 0.010
0 to 0.035
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040
Titanium (Ti), % 1.0 to 1.4
0