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ASTM Grade HP Steel vs. ASTM A369 Grade FP22

Both ASTM grade HP steel and ASTM A369 grade FP22 are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 ASTM grade HP steel and the bottom bar is ASTM A369 grade FP22.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 5.1
20
Fatigue Strength, MPa 130
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
74
Tensile Strength: Ultimate (UTS), MPa 490
470
Tensile Strength: Yield (Proof), MPa 260
240

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Maximum Temperature: Mechanical, °C 1100
460
Melting Completion (Liquidus), °C 1370
1470
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
39
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 34
3.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 5.8
1.7
Embodied Energy, MJ/kg 82
23
Embodied Water, L/kg 220
58

Common Calculations

PREN (Pitting Resistance) 27
5.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
80
Resilience: Unit (Modulus of Resilience), kJ/m3 170
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
17
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 11
14

Alloy Composition

Carbon (C), % 0.35 to 0.75
0.050 to 0.15
Chromium (Cr), % 24 to 28
1.9 to 2.6
Iron (Fe), % 29.2 to 42.7
95 to 96.9
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.87 to 1.1
Nickel (Ni), % 33 to 37
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.025