ASTM A414 Steel vs. Nickel 725

ASTM A414 steel belongs to the iron alloys classification, while nickel 725 belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A414 steel and the bottom bar is nickel 725.

ASTM A414 Pressure Vessel Steel Nickel Alloy 725 (N07725)

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		15 to 26
Elongation at Break, %		34

Fatigue Strength, MPa		140 to 260
Fatigue Strength, MPa		260

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		73
Shear Modulus, GPa		78

Shear Strength, MPa		230 to 370
Shear Strength, MPa		580

Tensile Strength: Ultimate (UTS), MPa		360 to 590
Tensile Strength: Ultimate (UTS), MPa		860

Tensile Strength: Yield (Proof), MPa		190 to 350
Tensile Strength: Yield (Proof), MPa		350

Thermal Properties

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

Maximum Temperature: Mechanical, °C		400
Maximum Temperature: Mechanical, °C		980

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1340

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1270

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		440

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.2 to 7.3
Electrical Conductivity: Equal Volume, % IACS		1.5

Electrical Conductivity: Equal Weight (Specific), % IACS		8.3 to 8.4
Electrical Conductivity: Equal Weight (Specific), % IACS		1.6

Otherwise Unclassified Properties

Base Metal Price, % relative		2.2
Base Metal Price, % relative		75

Density, g/cm³		7.8 to 7.9
Density, g/cm³		8.5

Embodied Carbon, kg CO₂/kg material		1.5 to 1.6
Embodied Carbon, kg CO₂/kg material		13

Embodied Energy, MJ/kg		20 to 22
Embodied Energy, MJ/kg		190

Embodied Water, L/kg		48
Embodied Water, L/kg		270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		69 to 130
Resilience: Ultimate (Unit Rupture Work), MJ/m³		240

Resilience: Unit (Modulus of Resilience), kJ/m³		100 to 330
Resilience: Unit (Modulus of Resilience), kJ/m³		300

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

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		13 to 21
Strength to Weight: Axial, points		28

Strength to Weight: Bending, points		14 to 20
Strength to Weight: Bending, points		24

Thermal Shock Resistance, points		11 to 17
Thermal Shock Resistance, points		23