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ASTM A369 Grade FP12 vs. ASTM Grade HL Steel

Both ASTM A369 grade FP12 and ASTM grade HL steel are iron alloys. They have 49% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP12 and the bottom bar is ASTM grade HL steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
11
Fatigue Strength, MPa 170
150
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 470
500
Tensile Strength: Yield (Proof), MPa 250
270

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
27
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
4.5
Embodied Energy, MJ/kg 21
65
Embodied Water, L/kg 52
210

Common Calculations

PREN (Pitting Resistance) 2.8
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
48
Resilience: Unit (Modulus of Resilience), kJ/m3 160
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
18
Thermal Shock Resistance, points 14
11

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.2 to 0.6
Chromium (Cr), % 0.8 to 1.3
28 to 32
Iron (Fe), % 96.8 to 98.4
40.8 to 53.8
Manganese (Mn), % 0.3 to 0.61
0 to 2.0
Molybdenum (Mo), % 0.44 to 0.65
0 to 0.5
Nickel (Ni), % 0
18 to 22
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.025
0 to 0.040