MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. S20910 Stainless Steel

Both SAE-AISI 4340M steel and S20910 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 30 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 SAE-AISI 4340M steel and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
14 to 39
Fatigue Strength, MPa 690
310 to 460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
79
Shear Strength, MPa 1360
500 to 570
Tensile Strength: Ultimate (UTS), MPa 2340
780 to 940
Tensile Strength: Yield (Proof), MPa 1240
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 430
1080
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
13
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
4.8
Embodied Energy, MJ/kg 26
68
Embodied Water, L/kg 55
180

Common Calculations

PREN (Pitting Resistance) 2.2
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
460 to 1640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
28 to 33
Strength to Weight: Bending, points 51
24 to 27
Thermal Diffusivity, mm2/s 10
3.6
Thermal Shock Resistance, points 70
17 to 21

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.060
Chromium (Cr), % 0.7 to 1.0
20.5 to 23.5
Iron (Fe), % 93.3 to 94.8
52.1 to 62.1
Manganese (Mn), % 0.65 to 0.9
4.0 to 6.0
Molybdenum (Mo), % 0.35 to 0.45
1.5 to 3.0
Nickel (Ni), % 1.7 to 2.0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.012
0 to 0.040
Silicon (Si), % 1.5 to 1.8
0 to 0.75
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0.1 to 0.3