MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. S33550 Stainless Steel

Both SAE-AISI 4340M steel and S33550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 58% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is S33550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
40
Fatigue Strength, MPa 690
270
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
79
Shear Strength, MPa 1360
470
Tensile Strength: Ultimate (UTS), MPa 2340
680
Tensile Strength: Yield (Proof), MPa 1240
310

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
24
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
4.3
Embodied Energy, MJ/kg 26
61
Embodied Water, L/kg 55
190

Common Calculations

PREN (Pitting Resistance) 2.2
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
24
Strength to Weight: Bending, points 51
22
Thermal Diffusivity, mm2/s 10
3.9
Thermal Shock Resistance, points 70
15

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.040 to 0.1
Cerium (Ce), % 0
0.025 to 0.070
Chromium (Cr), % 0.7 to 1.0
25 to 28
Iron (Fe), % 93.3 to 94.8
48.8 to 58.2
Lanthanum (La), % 0
0.025 to 0.070
Manganese (Mn), % 0.65 to 0.9
0 to 1.5
Molybdenum (Mo), % 0.35 to 0.45
0
Nickel (Ni), % 1.7 to 2.0
16.5 to 20
Niobium (Nb), % 0
0.050 to 0.15
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0 to 0.012
0 to 0.040
Silicon (Si), % 1.5 to 1.8
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0