ASTM A387 Grade 2 Steel vs. AWS E312

Both ASTM A387 grade 2 steel and AWS E312 are iron alloys. They have 60% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 2 steel and the bottom bar is AWS E312.

ASTM A387 Grade 2 (S50460) 0.5Cr-0.5Mo Steel AWS E312 (W31310) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		25
Elongation at Break, %		25

Poisson's Ratio		0.29
Poisson's Ratio		0.27

Shear Modulus, GPa		73
Shear Modulus, GPa		80

Tensile Strength: Ultimate (UTS), MPa		470 to 550
Tensile Strength: Ultimate (UTS), MPa		740

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		310

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

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1360

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Base Metal Price, % relative		2.6
Base Metal Price, % relative		20

Density, g/cm³		7.9
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		1.6
Embodied Carbon, kg CO₂/kg material		3.6

Embodied Energy, MJ/kg		20
Embodied Energy, MJ/kg		52

Embodied Water, L/kg		50
Embodied Water, L/kg		200

Common Calculations

PREN (Pitting Resistance)		2.4
PREN (Pitting Resistance)		31

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		16 to 20
Strength to Weight: Axial, points		27

Strength to Weight: Bending, points		17 to 19
Strength to Weight: Bending, points		24

Thermal Shock Resistance, points		14 to 16
Thermal Shock Resistance, points		18

Alloy Composition

Carbon (C), %		0.050 to 0.21
Carbon (C), %		0 to 0.15

Chromium (Cr), %		0.5 to 0.8
Chromium (Cr), %		28 to 32

Copper (Cu), %		0
Copper (Cu), %		0 to 0.75

Iron (Fe), %		97.1 to 98.3
Iron (Fe), %		52.3 to 63.5

Manganese (Mn), %		0.55 to 0.8
Manganese (Mn), %		0.5 to 2.5

Molybdenum (Mo), %		0.45 to 0.6
Molybdenum (Mo), %		0 to 0.75

Nickel (Ni), %		0
Nickel (Ni), %		8.0 to 10.5

Phosphorus (P), %		0 to 0.025
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0.15 to 0.4
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.025
Sulfur (S), %		0 to 0.030