EN 1.7220 Steel vs. R58150 Titanium

EN 1.7220 steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.7220 steel and the bottom bar is R58150 titanium.

EN 1.7220 (34CrMo4) Chromium-Molybdenum Steel UNS R58150 Titanium (Ti-15Mo)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		140

Poisson's Ratio		0.29
Poisson's Ratio		0.32

Shear Modulus, GPa		73
Shear Modulus, GPa		52

Tensile Strength: Ultimate (UTS), MPa		520 to 1720
Tensile Strength: Ultimate (UTS), MPa		770

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		410

Maximum Temperature: Mechanical, °C		420
Maximum Temperature: Mechanical, °C		320

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1760

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1700

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		500

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		8.4

Otherwise Unclassified Properties

Base Metal Price, % relative		2.5
Base Metal Price, % relative		48

Density, g/cm³		7.8
Density, g/cm³		5.4

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		31

Embodied Energy, MJ/kg		20
Embodied Energy, MJ/kg		480

Embodied Water, L/kg		51
Embodied Water, L/kg		150

Common Calculations

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

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		32

Strength to Weight: Axial, points		18 to 61
Strength to Weight: Axial, points		40

Strength to Weight: Bending, points		18 to 41
Strength to Weight: Bending, points		35

Thermal Shock Resistance, points		15 to 50
Thermal Shock Resistance, points		48

Alloy Composition

Carbon (C), %		0.3 to 0.37
Carbon (C), %		0 to 0.1

Chromium (Cr), %		0.9 to 1.2
Chromium (Cr), %		0

Hydrogen (H), %		0
Hydrogen (H), %		0 to 0.015

Iron (Fe), %		96.8 to 98.1
Iron (Fe), %		0 to 0.1

Manganese (Mn), %		0.6 to 0.9
Manganese (Mn), %		0

Molybdenum (Mo), %		0.15 to 0.3
Molybdenum (Mo), %		14 to 16

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.050

Oxygen (O), %		0
Oxygen (O), %		0 to 0.2

Phosphorus (P), %		0 to 0.035
Phosphorus (P), %		0

Silicon (Si), %		0 to 0.4
Silicon (Si), %		0

Sulfur (S), %		0 to 0.035
Sulfur (S), %		0

Titanium (Ti), %		0
Titanium (Ti), %		83.5 to 86