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AISI 309 Stainless Steel vs. ASTM A356 Grade 6

Both AISI 309 stainless steel and ASTM A356 grade 6 are iron alloys. They have 64% of their average alloy composition in common. There are 31 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 309 stainless steel and the bottom bar is ASTM A356 grade 6.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 47
25
Fatigue Strength, MPa 250 to 280
250
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 600 to 710
550
Tensile Strength: Yield (Proof), MPa 260 to 350
350

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
430
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
41
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.6
Embodied Energy, MJ/kg 51
21
Embodied Water, L/kg 170
53

Common Calculations

PREN (Pitting Resistance) 23
3.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
20
Strength to Weight: Bending, points 20 to 23
19
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 14 to 16
16

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.2
Chromium (Cr), % 22 to 24
1.0 to 1.5
Iron (Fe), % 58 to 66
96.2 to 98.1
Manganese (Mn), % 0 to 2.0
0.5 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.65
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030