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S40977 Stainless Steel vs. S20433 Stainless Steel

Both S40977 stainless steel and S20433 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is S40977 stainless steel and the bottom bar is S20433 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
46
Fatigue Strength, MPa 200
250
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 76
82
Shear Modulus, GPa 76
76
Shear Strength, MPa 320
440
Tensile Strength: Ultimate (UTS), MPa 510
630
Tensile Strength: Yield (Proof), MPa 310
270

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 720
900
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
17

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 6.5
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.7
Embodied Energy, MJ/kg 27
39
Embodied Water, L/kg 97
150

Common Calculations

PREN (Pitting Resistance) 12
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
230
Resilience: Unit (Modulus of Resilience), kJ/m3 250
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
23
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 18
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 10.5 to 12.5
17 to 18
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 83.9 to 89.2
64.1 to 72.4
Manganese (Mn), % 0 to 1.5
5.5 to 7.5
Nickel (Ni), % 0.3 to 1.0
3.5 to 5.5
Nitrogen (N), % 0 to 0.030
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030