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S40945 Stainless Steel vs. S42030 Stainless Steel

Both S40945 stainless steel and S42030 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 93% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S40945 stainless steel and the bottom bar is S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
16
Fatigue Strength, MPa 160
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Shear Strength, MPa 270
410
Tensile Strength: Ultimate (UTS), MPa 430
670
Tensile Strength: Yield (Proof), MPa 230
410

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 710
780
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
28
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.2
2.5
Embodied Energy, MJ/kg 31
34
Embodied Water, L/kg 94
110

Common Calculations

PREN (Pitting Resistance) 11
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
92
Resilience: Unit (Modulus of Resilience), kJ/m3 140
440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
24
Strength to Weight: Bending, points 16
22
Thermal Diffusivity, mm2/s 6.9
7.7
Thermal Shock Resistance, points 15
24

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.3
Chromium (Cr), % 10.5 to 11.7
12 to 14
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 85.1 to 89.3
77.6 to 85
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
1.0 to 3.0
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.18 to 0.4
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.050 to 0.2
0