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ASTM Grade HN Steel vs. AISI 309Cb Stainless Steel

Both ASTM grade HN steel and AISI 309Cb stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is AISI 309Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.0
39
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 500
580

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 420
510
Maximum Temperature: Mechanical, °C 1080
1090
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 26
23
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.6
4.1
Embodied Energy, MJ/kg 66
59
Embodied Water, L/kg 180
170

Common Calculations

PREN (Pitting Resistance) 22
23
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
20
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 3.5
4.0
Thermal Shock Resistance, points 11
13

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.080
Chromium (Cr), % 19 to 23
22 to 24
Iron (Fe), % 44.9 to 57.8
56 to 66
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
12 to 16
Niobium (Nb), % 0
0 to 1.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030