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EN 1.4658 Stainless Steel vs. ASTM A387 Grade 9 Steel

Both EN 1.4658 stainless steel and ASTM A387 grade 9 steel are iron alloys. They have 68% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 28
20 to 21
Fatigue Strength, MPa 530
160 to 240
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
75
Shear Strength, MPa 580
310 to 380
Tensile Strength: Ultimate (UTS), MPa 900
500 to 600
Tensile Strength: Yield (Proof), MPa 730
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Mechanical, °C 1100
600
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
26
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.5
2.1
Embodied Energy, MJ/kg 61
28
Embodied Water, L/kg 200
87

Common Calculations

PREN (Pitting Resistance) 49
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
140 to 310
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
18 to 21
Strength to Weight: Bending, points 26
18 to 20
Thermal Diffusivity, mm2/s 4.3
6.9
Thermal Shock Resistance, points 24
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 26 to 29
8.0 to 10
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
87.1 to 90.8
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 4.0 to 5.0
0.9 to 1.1
Nickel (Ni), % 5.5 to 9.5
0
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.025
Vanadium (V), % 0
0 to 0.040