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S40930 Stainless Steel vs. ASTM A372 Grade K Steel

Both S40930 stainless steel and ASTM A372 grade K steel are iron alloys. They have 89% 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 S40930 stainless steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
23
Fatigue Strength, MPa 130
440
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 270
490
Tensile Strength: Ultimate (UTS), MPa 430
780
Tensile Strength: Yield (Proof), MPa 190
620

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 710
440
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
48
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
4.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 32
24
Embodied Water, L/kg 94
57

Common Calculations

PREN (Pitting Resistance) 11
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
160
Resilience: Unit (Modulus of Resilience), kJ/m3 94
1010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 16
27
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 16
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.18
Chromium (Cr), % 10.5 to 11.7
1.0 to 1.8
Iron (Fe), % 84.7 to 89.4
93.4 to 96.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.4
Molybdenum (Mo), % 0
0.2 to 0.6
Nickel (Ni), % 0 to 0.5
2.0 to 3.3
Niobium (Nb), % 0.080 to 0.75
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0.050 to 0.2
0