MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. S32803 Stainless Steel

Both SAE-AISI 4340M steel and S32803 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 69% 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 S32803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
210
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 6.0
18
Fatigue Strength, MPa 690
350
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
81
Shear Strength, MPa 1360
420
Tensile Strength: Ultimate (UTS), MPa 2340
680
Tensile Strength: Yield (Proof), MPa 1240
560

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
19
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
3.7
Embodied Energy, MJ/kg 26
53
Embodied Water, L/kg 55
180

Common Calculations

PREN (Pitting Resistance) 2.2
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
760
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
25
Strength to Weight: Bending, points 51
22
Thermal Diffusivity, mm2/s 10
4.4
Thermal Shock Resistance, points 70
22

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.015
Chromium (Cr), % 0.7 to 1.0
28 to 29
Iron (Fe), % 93.3 to 94.8
62.9 to 67.1
Manganese (Mn), % 0.65 to 0.9
0 to 0.5
Molybdenum (Mo), % 0.35 to 0.45
1.8 to 2.5
Nickel (Ni), % 1.7 to 2.0
3.0 to 4.0
Niobium (Nb), % 0
0.15 to 0.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.012
0 to 0.020
Silicon (Si), % 1.5 to 1.8
0 to 0.55
Sulfur (S), % 0 to 0.012
0 to 0.0035
Vanadium (V), % 0.050 to 0.1
0