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ASTM Grade HI Steel vs. ASTM A369 Grade FP9

Both ASTM grade HI steel and ASTM A369 grade FP9 are iron alloys. They have 64% 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 ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
20
Fatigue Strength, MPa 150
160
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
75
Tensile Strength: Ultimate (UTS), MPa 550
470
Tensile Strength: Yield (Proof), MPa 270
240

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Mechanical, °C 1100
600
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
10

Otherwise Unclassified Properties

Base Metal Price, % relative 23
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.0
Embodied Energy, MJ/kg 59
28
Embodied Water, L/kg 200
87

Common Calculations

PREN (Pitting Resistance) 29
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
80
Resilience: Unit (Modulus of Resilience), kJ/m3 180
140
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
17
Thermal Diffusivity, mm2/s 3.9
6.9
Thermal Shock Resistance, points 12
13

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.15
Chromium (Cr), % 26 to 30
8.0 to 10
Iron (Fe), % 46.9 to 59.8
87.1 to 90.3
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.9 to 1.1
Nickel (Ni), % 14 to 18
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0.5 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030