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ASTM Grade HI Steel vs. EN 1.4518 Stainless Steel

Both ASTM grade HI steel and EN 1.4518 stainless steel are iron alloys. They have 85% 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 ASTM grade HI steel and the bottom bar is EN 1.4518 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
34
Fatigue Strength, MPa 150
160
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 550
490
Tensile Strength: Yield (Proof), MPa 270
210

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
20
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.1
4.0
Embodied Energy, MJ/kg 59
55
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 29
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
140
Resilience: Unit (Modulus of Resilience), kJ/m3 180
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
17
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 3.9
4.1
Thermal Shock Resistance, points 12
14

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 26 to 30
18 to 20
Iron (Fe), % 46.9 to 59.8
61.4 to 70
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
3.0 to 3.5
Nickel (Ni), % 14 to 18
9.0 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.5
Sulfur (S), % 0 to 0.040
0 to 0.030