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S45500 Stainless Steel vs. SAE-AISI 4340M Steel

Both S45500 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 79% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S45500 stainless steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 500
710
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 3.4 to 11
6.0
Fatigue Strength, MPa 570 to 890
690
Poisson's Ratio 0.28
0.29
Rockwell C Hardness 32 to 54
55
Shear Modulus, GPa 75
72
Shear Strength, MPa 790 to 1090
1360
Tensile Strength: Ultimate (UTS), MPa 1370 to 1850
2340
Tensile Strength: Yield (Proof), MPa 1240 to 1700
1240

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 760
430
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 17
3.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.9
Embodied Energy, MJ/kg 57
26
Embodied Water, L/kg 120
55

Common Calculations

PREN (Pitting Resistance) 13
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 190
120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 48 to 65
84
Strength to Weight: Bending, points 35 to 42
51
Thermal Shock Resistance, points 48 to 64
70

Alloy Composition

Carbon (C), % 0 to 0.050
0.38 to 0.43
Chromium (Cr), % 11 to 12.5
0.7 to 1.0
Copper (Cu), % 1.5 to 2.5
0
Iron (Fe), % 71.5 to 79.2
93.3 to 94.8
Manganese (Mn), % 0 to 0.5
0.65 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.35 to 0.45
Nickel (Ni), % 7.5 to 9.5
1.7 to 2.0
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.012
Silicon (Si), % 0 to 0.5
1.5 to 1.8
Sulfur (S), % 0 to 0.030
0 to 0.012
Tantalum (Ta), % 0 to 0.5
0
Titanium (Ti), % 0.8 to 1.4
0
Vanadium (V), % 0
0.050 to 0.1