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ASTM A369 Grade FP12 vs. AISI 429 Stainless Steel

Both ASTM A369 grade FP12 and AISI 429 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP12 and the bottom bar is AISI 429 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
25
Fatigue Strength, MPa 170
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 300
300
Tensile Strength: Ultimate (UTS), MPa 470
480
Tensile Strength: Yield (Proof), MPa 250
260

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 430
810
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
7.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
2.0
Embodied Energy, MJ/kg 21
28
Embodied Water, L/kg 52
110

Common Calculations

PREN (Pitting Resistance) 2.8
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
99
Resilience: Unit (Modulus of Resilience), kJ/m3 160
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 12
6.9
Thermal Shock Resistance, points 14
17

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.12
Chromium (Cr), % 0.8 to 1.3
14 to 16
Iron (Fe), % 96.8 to 98.4
81.8 to 86
Manganese (Mn), % 0.3 to 0.61
0 to 1.0
Molybdenum (Mo), % 0.44 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030