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AISI 316 Stainless Steel vs. ASTM A369 Grade FP21

Both AISI 316 stainless steel and ASTM A369 grade FP21 are iron alloys. They have 72% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 316 stainless steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 360
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 8.0 to 55
20
Fatigue Strength, MPa 210 to 430
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
74
Shear Strength, MPa 350 to 690
300
Tensile Strength: Ultimate (UTS), MPa 520 to 1180
470
Tensile Strength: Yield (Proof), MPa 230 to 850
240

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 590
470
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
41
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
4.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.9
1.8
Embodied Energy, MJ/kg 53
23
Embodied Water, L/kg 150
61

Common Calculations

PREN (Pitting Resistance) 26
6.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 85 to 260
80
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 1820
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 41
17
Strength to Weight: Bending, points 18 to 31
17
Thermal Diffusivity, mm2/s 4.1
11
Thermal Shock Resistance, points 11 to 26
14

Alloy Composition

Carbon (C), % 0 to 0.080
0.050 to 0.15
Chromium (Cr), % 16 to 18
2.7 to 3.4
Iron (Fe), % 62 to 72
94.3 to 96.2
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.0 to 3.0
0.8 to 1.1
Nickel (Ni), % 10 to 14
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025