ASTM Grade HK Steel vs. 50Cr-50Ni-Cb Alloy

ASTM grade HK steel belongs to the iron alloys classification, while 50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals. They have 47% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HK steel and the bottom bar is 50Cr-50Ni-Cb alloy.

ASTM Grade HK (25Cr-20Ni, J94224) Cast Stainless Steel 50Cr-50Ni-Cb (R20501) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		11
Elongation at Break, %		5.6

Poisson's Ratio		0.27
Poisson's Ratio		0.26

Shear Modulus, GPa		79
Shear Modulus, GPa		84

Tensile Strength: Ultimate (UTS), MPa		500
Tensile Strength: Ultimate (UTS), MPa		620

Tensile Strength: Yield (Proof), MPa		270
Tensile Strength: Yield (Proof), MPa		390

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		350

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

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		25
Base Metal Price, % relative		60

Density, g/cm³		7.8
Density, g/cm³		8.0

Embodied Carbon, kg CO₂/kg material		4.4
Embodied Carbon, kg CO₂/kg material		9.2

Embodied Energy, MJ/kg		63
Embodied Energy, MJ/kg		130

Embodied Water, L/kg		200
Embodied Water, L/kg		350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		48
Resilience: Ultimate (Unit Rupture Work), MJ/m³		30

Resilience: Unit (Modulus of Resilience), kJ/m³		190
Resilience: Unit (Modulus of Resilience), kJ/m³		370

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		15

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

Strength to Weight: Axial, points		18
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		20

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		14

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.25

Carbon (C), %		0.2 to 0.6
Carbon (C), %		0 to 0.1

Chromium (Cr), %		24 to 28
Chromium (Cr), %		47 to 52

Iron (Fe), %		44.8 to 57.8
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0 to 0.3

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

Nickel (Ni), %		18 to 22
Nickel (Ni), %		43.3 to 51.6

Niobium (Nb), %		0
Niobium (Nb), %		1.4 to 1.7

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.16

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

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 0.5

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.5