ASTM Grade HF Steel vs. Grade 350 Maraging Steel

Both ASTM grade HF steel and grade 350 maraging steel are iron alloys. They have 73% of their average alloy composition in common. There are 23 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 HF steel and the bottom bar is grade 350 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		29
Elongation at Break, %		4.1 to 18

Poisson's Ratio		0.28
Poisson's Ratio		0.3

Shear Modulus, GPa		77
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		550
Tensile Strength: Ultimate (UTS), MPa		1140 to 2420

Tensile Strength: Yield (Proof), MPa		270
Tensile Strength: Yield (Proof), MPa		830 to 2300

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1410
Melting Completion (Liquidus), °C		1470

Melting Onset (Solidus), °C		1370
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		17
Base Metal Price, % relative		39

Density, g/cm³		7.7
Density, g/cm³		8.2

Embodied Carbon, kg CO₂/kg material		3.2
Embodied Carbon, kg CO₂/kg material		5.6

Embodied Energy, MJ/kg		46
Embodied Energy, MJ/kg		74

Embodied Water, L/kg		150
Embodied Water, L/kg		160

Common Calculations

PREN (Pitting Resistance)		21
PREN (Pitting Resistance)		16

Resilience: Ultimate (Unit Rupture Work), MJ/m³		130
Resilience: Ultimate (Unit Rupture Work), MJ/m³		98 to 190

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

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		20
Strength to Weight: Axial, points		38 to 82

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		29 to 49

Thermal Shock Resistance, points		12
Thermal Shock Resistance, points		35 to 74

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0.050 to 0.15

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

Calcium (Ca), %		0
Calcium (Ca), %		0 to 0.050

Carbon (C), %		0.2 to 0.4
Carbon (C), %		0 to 0.030

Chromium (Cr), %		18 to 23
Chromium (Cr), %		0

Cobalt (Co), %		0
Cobalt (Co), %		11.5 to 12.5

Iron (Fe), %		60 to 73.8
Iron (Fe), %		61.2 to 64.6

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0 to 0.1

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		4.6 to 5.2

Nickel (Ni), %		8.0 to 12
Nickel (Ni), %		18 to 19

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.010

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 0.1

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.010

Titanium (Ti), %		0
Titanium (Ti), %		1.3 to 1.6

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.020