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ASTM Grade HN Steel vs. EN 1.6958 Steel

Both ASTM grade HN steel and EN 1.6958 steel are iron alloys. They have 57% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is EN 1.6958 steel.

ASTM Grade HN (20Cr-25Ni, J94213) Cast Stainless Steel EN 1.6958 (26NiCrMo14-6) Nickel-Chromium Steel

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness		140
Brinell Hardness		340

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

Elongation at Break, %		9.0
Elongation at Break, %		16

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		1140

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		450

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		47

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Base Metal Price, % relative		26
Base Metal Price, % relative		5.0

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

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		2.0

Embodied Energy, MJ/kg		66
Embodied Energy, MJ/kg		27

Embodied Water, L/kg		180
Embodied Water, L/kg		60

Common Calculations

PREN (Pitting Resistance)		22
PREN (Pitting Resistance)		2.9

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		40

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		31

Thermal Diffusivity, mm²/s		3.5
Thermal Diffusivity, mm²/s		13

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		39

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0.0050 to 0.050

Carbon (C), %		0.2 to 0.5
Carbon (C), %		0.25 to 0.3

Chromium (Cr), %		19 to 23
Chromium (Cr), %		1.2 to 1.7

Iron (Fe), %		44.9 to 57.8
Iron (Fe), %		92.6 to 94.5

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0.2 to 0.5

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		0.35 to 0.55

Nickel (Ni), %		23 to 27
Nickel (Ni), %		3.3 to 3.8

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0.15 to 0.3

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.015

Vanadium (V), %		0
Vanadium (V), %		0 to 0.12