MakeItFrom.com
Menu (ESC)

ASTM A387 Grade 21L Class 1 vs. ASTM A369 Grade FP2

Both ASTM A387 grade 21L class 1 and ASTM A369 grade FP2 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 21L class 1 and the bottom bar is ASTM A369 grade FP2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
20
Fatigue Strength, MPa 160
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310
270
Tensile Strength: Ultimate (UTS), MPa 500
430
Tensile Strength: Yield (Proof), MPa 230
240

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
420
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
49
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
2.6
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.6
Embodied Energy, MJ/kg 23
20
Embodied Water, L/kg 62
50

Common Calculations

PREN (Pitting Resistance) 6.4
2.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
75
Resilience: Unit (Modulus of Resilience), kJ/m3 140
150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
15
Strength to Weight: Bending, points 18
16
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.1
0.1 to 0.2
Chromium (Cr), % 2.8 to 3.3
0.5 to 0.81
Iron (Fe), % 94.4 to 96.1
97.4 to 98.6
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.61
Molybdenum (Mo), % 0.9 to 1.1
0.44 to 0.65
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.1 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.025