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S40930 Stainless Steel vs. S39274 Stainless Steel

Both S40930 stainless steel and S39274 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 74% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S40930 stainless steel and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 23
17
Fatigue Strength, MPa 130
380
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
81
Shear Strength, MPa 270
560
Tensile Strength: Ultimate (UTS), MPa 430
900
Tensile Strength: Yield (Proof), MPa 190
620

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 460
450
Maximum Temperature: Mechanical, °C 710
1100
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.3
4.3
Embodied Energy, MJ/kg 32
60
Embodied Water, L/kg 94
180

Common Calculations

PREN (Pitting Resistance) 11
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
140
Resilience: Unit (Modulus of Resilience), kJ/m3 94
940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16
32
Strength to Weight: Bending, points 16
26
Thermal Diffusivity, mm2/s 6.7
4.2
Thermal Shock Resistance, points 16
25

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 10.5 to 11.7
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 84.7 to 89.4
57 to 65.6
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.5
6.0 to 8.0
Niobium (Nb), % 0.080 to 0.75
0
Nitrogen (N), % 0 to 0.030
0.24 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0.050 to 0.2
0
Tungsten (W), % 0
1.5 to 2.5