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ASTM A387 Grade 9 Steel vs. EN 1.4123 Stainless Steel

Both ASTM A387 grade 9 steel and EN 1.4123 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 9 steel and the bottom bar is EN 1.4123 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 500 to 600
720 to 810

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
840
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
23
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.1
4.2
Embodied Energy, MJ/kg 28
62
Embodied Water, L/kg 87
120

Common Calculations

PREN (Pitting Resistance) 12
24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
26 to 29
Strength to Weight: Bending, points 18 to 20
23 to 25
Thermal Diffusivity, mm2/s 6.9
6.3
Thermal Shock Resistance, points 14 to 17
26 to 29

Alloy Composition

Carbon (C), % 0 to 0.15
0.35 to 0.5
Chromium (Cr), % 8.0 to 10
14 to 16.5
Iron (Fe), % 87.1 to 90.8
76.7 to 84.6
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
1.0 to 2.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0 to 0.040
0 to 1.5

Comparable Variants