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ASTM Grade HI Steel vs. EN 1.4318 Stainless Steel

Both ASTM grade HI steel and EN 1.4318 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 32 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 1.4318 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
44
Fatigue Strength, MPa 150
340
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 550
740
Tensile Strength: Yield (Proof), MPa 270
380

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 450
410
Maximum Temperature: Mechanical, °C 1100
910
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 23
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.8
Embodied Energy, MJ/kg 59
39
Embodied Water, L/kg 200
130

Common Calculations

PREN (Pitting Resistance) 29
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
280
Resilience: Unit (Modulus of Resilience), kJ/m3 180
360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
27
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 12
17

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 26 to 30
16.5 to 18.5
Iron (Fe), % 46.9 to 59.8
70.2 to 77.4
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 14 to 18
6.0 to 8.0
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015