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EN 1.4028 Stainless Steel vs. ASTM A387 Grade 9 Steel

Both EN 1.4028 stainless steel and ASTM A387 grade 9 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4028 stainless steel and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
20 to 21
Fatigue Strength, MPa 230 to 400
160 to 240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Shear Strength, MPa 410 to 550
310 to 380
Tensile Strength: Ultimate (UTS), MPa 660 to 930
500 to 600
Tensile Strength: Yield (Proof), MPa 390 to 730
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 760
600
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
26
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
10

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.1
Embodied Energy, MJ/kg 27
28
Embodied Water, L/kg 100
87

Common Calculations

PREN (Pitting Resistance) 13
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 94 to 96
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
140 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 33
18 to 21
Strength to Weight: Bending, points 22 to 27
18 to 20
Thermal Diffusivity, mm2/s 8.1
6.9
Thermal Shock Resistance, points 23 to 32
14 to 17

Alloy Composition

Carbon (C), % 0.26 to 0.35
0 to 0.15
Chromium (Cr), % 12 to 14
8.0 to 10
Iron (Fe), % 83.1 to 87.7
87.1 to 90.8
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025
Vanadium (V), % 0
0 to 0.040

Comparable Variants