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AISI 309HCb Stainless Steel vs. S20432 Stainless Steel

Both AISI 309HCb stainless steel and S20432 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is AISI 309HCb stainless steel and the bottom bar is S20432 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
45
Fatigue Strength, MPa 210
210
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 82
81
Shear Modulus, GPa 78
76
Shear Strength, MPa 410
400
Tensile Strength: Ultimate (UTS), MPa 590
580
Tensile Strength: Yield (Proof), MPa 230
230

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 510
410
Maximum Temperature: Mechanical, °C 1090
900
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 23
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.7
Embodied Energy, MJ/kg 59
38
Embodied Water, L/kg 170
140

Common Calculations

PREN (Pitting Resistance) 23
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
210
Resilience: Unit (Modulus of Resilience), kJ/m3 130
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 13
13

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 22 to 24
17 to 18
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 56 to 66
66.7 to 74
Manganese (Mn), % 0 to 2.0
3.0 to 5.0
Nickel (Ni), % 12 to 16
4.0 to 6.0
Niobium (Nb), % 0 to 1.1
0
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030