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ASTM Grade HH Steel vs. EN 1.4837 Stainless Steel

Both ASTM grade HH steel and EN 1.4837 stainless steel are iron alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is ASTM grade HH steel and the bottom bar is EN 1.4837 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
6.8
Fatigue Strength, MPa 150
120
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 580
500
Tensile Strength: Yield (Proof), MPa 270
250

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Corrosion, °C 440
440
Maximum Temperature: Mechanical, °C 1100
1050
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 14
14
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 20
20
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.7
3.7
Embodied Energy, MJ/kg 53
53
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 27
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
29
Resilience: Unit (Modulus of Resilience), kJ/m3 190
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 3.8
3.7
Thermal Shock Resistance, points 12
11

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.3 to 0.5
Chromium (Cr), % 24 to 28
24 to 27
Iron (Fe), % 52.9 to 64.8
53.4 to 63.7
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 11 to 14
11 to 14
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
1.0 to 2.5
Sulfur (S), % 0 to 0.040
0 to 0.030