EN 1.8515 Steel vs. ASTM B780 Alloy

EN 1.8515 steel belongs to the iron alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is EN 1.8515 steel and the bottom bar is ASTM B780 alloy.

EN 1.8515 (31CrMo12) Nitriding Steel ASTM B780 Silver-Copper-Nickel Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		11
Elongation at Break, %		1.1 to 9.1

Poisson's Ratio		0.29
Poisson's Ratio		0.36

Shear Modulus, GPa		74
Shear Modulus, GPa		30

Shear Strength, MPa		680
Shear Strength, MPa		200 to 340

Tensile Strength: Ultimate (UTS), MPa		1130
Tensile Strength: Ultimate (UTS), MPa		330 to 590

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		140

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.6
Electrical Conductivity: Equal Volume, % IACS		70 to 76

Electrical Conductivity: Equal Weight (Specific), % IACS		8.7
Electrical Conductivity: Equal Weight (Specific), % IACS		62 to 68

Otherwise Unclassified Properties

Density, g/cm³		7.8
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		4.5

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		40
Strength to Weight: Axial, points		9.1 to 16

Strength to Weight: Bending, points		31
Strength to Weight: Bending, points		11 to 15

Thermal Shock Resistance, points		33
Thermal Shock Resistance, points		16 to 29

Alloy Composition

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.050

Carbon (C), %		0.28 to 0.35
Carbon (C), %		0

Chromium (Cr), %		2.8 to 3.3
Chromium (Cr), %		0

Copper (Cu), %		0
Copper (Cu), %		23.5 to 25.7

Iron (Fe), %		94.7 to 96.5
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0
Lead (Pb), %		0 to 0.030

Manganese (Mn), %		0.4 to 0.7
Manganese (Mn), %		0

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

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		0.35 to 0.65

Phosphorus (P), %		0 to 0.025
Phosphorus (P), %		0

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

Silver (Ag), %		0
Silver (Ag), %		74 to 76

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

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.060