ASTM Grade HL Steel vs. SAE-AISI O7 Steel

Both ASTM grade HL steel and SAE-AISI O7 steel are iron alloys. They have 49% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HL steel and the bottom bar is SAE-AISI O7 steel.

ASTM Grade HL (29Cr-20Ni, N08604) Cast Stainless Steel SAE-AISI O7 (T31507) Oil-Hardening Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.27
Poisson's Ratio		0.29

Shear Modulus, GPa		80
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		500
Tensile Strength: Ultimate (UTS), MPa		680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1390
Melting Completion (Liquidus), °C		1480

Melting Onset (Solidus), °C		1340
Melting Onset (Solidus), °C		1430

Specific Heat Capacity, J/kg-K		490
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		27
Base Metal Price, % relative		6.0

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

Embodied Carbon, kg CO₂/kg material		4.5
Embodied Carbon, kg CO₂/kg material		2.3

Embodied Energy, MJ/kg		65
Embodied Energy, MJ/kg		33

Embodied Water, L/kg		210
Embodied Water, L/kg		52

Common Calculations

PREN (Pitting Resistance)		31
PREN (Pitting Resistance)		3.6

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		18
Strength to Weight: Axial, points		24 to 74

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		22 to 46

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		23 to 70

Alloy Composition

Carbon (C), %		0.2 to 0.6
Carbon (C), %		1.1 to 1.3

Chromium (Cr), %		28 to 32
Chromium (Cr), %		0.35 to 0.85

Copper (Cu), %		0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		40.8 to 53.8
Iron (Fe), %		92.9 to 97.6

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

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		0 to 0.3

Nickel (Ni), %		18 to 22
Nickel (Ni), %		0 to 0.3

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 0.6

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.030

Tungsten (W), %		0
Tungsten (W), %		1.0 to 2.0

Vanadium (V), %		0
Vanadium (V), %		0 to 0.4