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EN 1.3956 Stainless Steel vs. ASTM Grade HP Steel

Both EN 1.3956 stainless steel and ASTM grade HP steel are iron alloys. They have 72% of their average alloy composition in common. There are 27 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 EN 1.3956 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 27
5.1
Fatigue Strength, MPa 240
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 650
490
Tensile Strength: Yield (Proof), MPa 330
260

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 22
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.8
5.8
Embodied Energy, MJ/kg 68
82
Embodied Water, L/kg 180
220

Common Calculations

PREN (Pitting Resistance) 34
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
21
Resilience: Unit (Modulus of Resilience), kJ/m3 270
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
17
Strength to Weight: Bending, points 21
17
Thermal Shock Resistance, points 18
11

Alloy Composition

Carbon (C), % 0 to 0.060
0.35 to 0.75
Chromium (Cr), % 20.5 to 23.5
24 to 28
Iron (Fe), % 51.9 to 62.1
29.2 to 42.7
Manganese (Mn), % 4.0 to 6.0
0 to 2.0
Molybdenum (Mo), % 1.5 to 3.0
0 to 0.5
Nickel (Ni), % 11.5 to 13.5
33 to 37
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.1 to 0.3
0