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S40930 Stainless Steel vs. AISI 436 Stainless Steel

Both S40930 stainless steel and AISI 436 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.

For each property being compared, the top bar is S40930 stainless steel and the bottom bar is AISI 436 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
25
Fatigue Strength, MPa 130
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 76
77
Shear Modulus, GPa 75
77
Shear Strength, MPa 270
320
Tensile Strength: Ultimate (UTS), MPa 430
500
Tensile Strength: Yield (Proof), MPa 190
270

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 460
460
Maximum Temperature: Mechanical, °C 710
880
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.7
Embodied Energy, MJ/kg 32
38
Embodied Water, L/kg 94
120

Common Calculations

PREN (Pitting Resistance) 11
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
110
Resilience: Unit (Modulus of Resilience), kJ/m3 94
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16
18
Strength to Weight: Bending, points 16
18
Thermal Diffusivity, mm2/s 6.7
6.7
Thermal Shock Resistance, points 16
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.12
Chromium (Cr), % 10.5 to 11.7
16 to 18
Iron (Fe), % 84.7 to 89.4
77.8 to 83.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.75 to 1.3
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.080 to 0.75
0 to 0.8
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 0.020
0 to 0.030
Titanium (Ti), % 0.050 to 0.2
0