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ASTM A387 Grade 22 Steel vs. ASTM A369 Grade FP5

Both ASTM A387 grade 22 steel and ASTM A369 grade FP5 are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is ASTM A387 grade 22 steel and the bottom bar is ASTM A369 grade FP5.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
20
Fatigue Strength, MPa 160 to 240
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 300 to 380
300
Tensile Strength: Ultimate (UTS), MPa 480 to 600
470
Tensile Strength: Yield (Proof), MPa 230 to 350
240

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 460
510
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
4.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.7
Embodied Energy, MJ/kg 23
23
Embodied Water, L/kg 58
69

Common Calculations

PREN (Pitting Resistance) 5.6
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 85 to 110
80
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 21
17
Strength to Weight: Bending, points 17 to 20
17
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 14 to 17
13

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 2.0 to 2.5
4.0 to 6.0
Iron (Fe), % 95.1 to 96.8
92.1 to 95.3
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.45 to 0.65
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.025