ASTM Grade HN Steel vs. SAE-AISI 94B17 Steel

Both ASTM grade HN steel and SAE-AISI 94B17 steel are iron alloys. They have 54% of their average alloy composition in common. There are 24 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 SAE-AISI 94B17 steel.

ASTM Grade HN (20Cr-25Ni, J94213) Cast Stainless Steel SAE-AISI 94B17 (G94171) Boron Steel

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness		140
Brinell Hardness		130

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		9.0
Elongation at Break, %		25

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		77
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		500
Tensile Strength: Ultimate (UTS), MPa		440

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		250

Maximum Temperature: Mechanical, °C		1080
Maximum Temperature: Mechanical, °C		410

Melting Completion (Liquidus), °C		1400
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1350
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		13
Thermal Conductivity, W/m-K		39

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		26
Base Metal Price, % relative		2.4

Density, g/cm³		7.9
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		1.5

Embodied Energy, MJ/kg		66
Embodied Energy, MJ/kg		20

Embodied Water, L/kg		180
Embodied Water, L/kg		49

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		16

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		16

Thermal Diffusivity, mm²/s		3.5
Thermal Diffusivity, mm²/s		10

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		13

Alloy Composition

Boron (B), %		0
Boron (B), %		0.00050 to 0.0030

Carbon (C), %		0.2 to 0.5
Carbon (C), %		0.15 to 0.2

Chromium (Cr), %		19 to 23
Chromium (Cr), %		0.3 to 0.5

Iron (Fe), %		44.9 to 57.8
Iron (Fe), %		97.1 to 98.3

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0.75 to 1.0

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		0.080 to 0.15

Nickel (Ni), %		23 to 27
Nickel (Ni), %		0.3 to 0.6

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.035

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0.15 to 0.35

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.040