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EN 1.4317 Stainless Steel vs. ASTM A372 Grade K Steel

Both EN 1.4317 stainless steel and ASTM A372 grade K steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 87% of their average alloy composition in common. There are 30 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 EN 1.4317 stainless steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
23
Fatigue Strength, MPa 380
440
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 860
780
Tensile Strength: Yield (Proof), MPa 630
620

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 770
440
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
4.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.4
1.8
Embodied Energy, MJ/kg 33
24
Embodied Water, L/kg 110
57

Common Calculations

PREN (Pitting Resistance) 14
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
1010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31
27
Strength to Weight: Bending, points 26
24
Thermal Diffusivity, mm2/s 7.0
13
Thermal Shock Resistance, points 30
23

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.18
Chromium (Cr), % 12 to 13.5
1.0 to 1.8
Iron (Fe), % 78.7 to 84.5
93.4 to 96.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.4
Molybdenum (Mo), % 0 to 0.7
0.2 to 0.6
Nickel (Ni), % 3.5 to 5.0
2.0 to 3.3
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.010