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EN 1.4729 Stainless Steel vs. ASTM A387 Grade 12 Steel

Both EN 1.4729 stainless steel and ASTM A387 grade 12 steel are iron alloys. They have 86% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 15
25
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 850
430
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 24
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.8
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.6
Embodied Energy, MJ/kg 29
21
Embodied Water, L/kg 100
51

Common Calculations

PREN (Pitting Resistance) 14
2.7
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Thermal Diffusivity, mm2/s 6.5
12

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.050 to 0.17
Chromium (Cr), % 12 to 14
0.8 to 1.2
Iron (Fe), % 80.4 to 86.7
97 to 98.2
Manganese (Mn), % 0 to 1.0
0.4 to 0.65
Molybdenum (Mo), % 0 to 0.5
0.45 to 0.6
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 1.0 to 2.5
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025