MakeItFrom.com
Menu (ESC)

ASTM Grade HN Steel vs. AISI 418 Stainless Steel

Both ASTM grade HN steel and AISI 418 stainless steel are iron alloys. They have 67% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.0
17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 500
1100

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 1080
770
Melting Completion (Liquidus), °C 1400
1500
Melting Onset (Solidus), °C 1350
1460
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 13
25
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 26
15
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 4.6
2.9
Embodied Energy, MJ/kg 66
41
Embodied Water, L/kg 180
110

Common Calculations

PREN (Pitting Resistance) 22
19
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
38
Strength to Weight: Bending, points 18
29
Thermal Diffusivity, mm2/s 3.5
6.7
Thermal Shock Resistance, points 11
40

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.15 to 0.2
Chromium (Cr), % 19 to 23
12 to 14
Iron (Fe), % 44.9 to 57.8
78.5 to 83.6
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 23 to 27
1.8 to 2.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5