SAE-AISI A2 Steel vs. ASTM Grade HL Steel

Both SAE-AISI A2 steel and ASTM grade HL steel are iron alloys. They have 54% 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 SAE-AISI A2 steel and the bottom bar is ASTM grade HL steel.

SAE-AISI A2 (T30102) Air-Hardening Steel ASTM Grade HL (29Cr-20Ni, N08604) Cast Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.27

Shear Modulus, GPa		74
Shear Modulus, GPa		80

Tensile Strength: Ultimate (UTS), MPa		710 to 2040
Tensile Strength: Ultimate (UTS), MPa		500

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1450
Melting Completion (Liquidus), °C		1390

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		1340

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

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		17

Otherwise Unclassified Properties

Base Metal Price, % relative		5.5
Base Metal Price, % relative		27

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

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		4.5

Embodied Energy, MJ/kg		38
Embodied Energy, MJ/kg		65

Embodied Water, L/kg		73
Embodied Water, L/kg		210

Common Calculations

PREN (Pitting Resistance)		8.9
PREN (Pitting Resistance)		31

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

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

Strength to Weight: Axial, points		25 to 73
Strength to Weight: Axial, points		18

Strength to Weight: Bending, points		23 to 46
Strength to Weight: Bending, points		18

Thermal Shock Resistance, points		25 to 71
Thermal Shock Resistance, points		11

Alloy Composition

Carbon (C), %		1.0 to 1.1
Carbon (C), %		0.2 to 0.6

Chromium (Cr), %		4.8 to 5.5
Chromium (Cr), %		28 to 32

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

Iron (Fe), %		89.4 to 93.3
Iron (Fe), %		40.8 to 53.8

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

Molybdenum (Mo), %		0.9 to 1.4
Molybdenum (Mo), %		0 to 0.5

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

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

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

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

Vanadium (V), %		0.15 to 0.5
Vanadium (V), %		0