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ASTM A369 Grade FP21 vs. AISI 410 Stainless Steel

Both ASTM A369 grade FP21 and AISI 410 stainless steel are iron alloys. They have 90% 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 FP21 and the bottom bar is AISI 410 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
16 to 22
Fatigue Strength, MPa 160
190 to 350
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 300
330 to 470
Tensile Strength: Ultimate (UTS), MPa 470
520 to 770
Tensile Strength: Yield (Proof), MPa 240
290 to 580

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 470
710
Melting Completion (Liquidus), °C 1470
1530
Melting Onset (Solidus), °C 1430
1480
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
30
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.8
1.9
Embodied Energy, MJ/kg 23
27
Embodied Water, L/kg 61
100

Common Calculations

PREN (Pitting Resistance) 6.2
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
97 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 150
210 to 860
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
19 to 28
Strength to Weight: Bending, points 17
19 to 24
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 14
18 to 26

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.080 to 0.15
Chromium (Cr), % 2.7 to 3.4
11.5 to 13.5
Iron (Fe), % 94.3 to 96.2
83.5 to 88.4
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.8 to 1.1
0
Nickel (Ni), % 0
0 to 0.75
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