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ASTM Grade HH Steel vs. AISI 204 Stainless Steel

Both ASTM grade HH steel and AISI 204 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HH steel and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
210 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
23 to 39
Fatigue Strength, MPa 150
320 to 720
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 580
730 to 1100
Tensile Strength: Yield (Proof), MPa 270
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
410
Maximum Temperature: Mechanical, °C 1100
850
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1360
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 20
10
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.4
Embodied Energy, MJ/kg 53
35
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 27
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 190
360 to 2940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
27 to 40
Strength to Weight: Bending, points 20
24 to 31
Thermal Diffusivity, mm2/s 3.8
4.1
Thermal Shock Resistance, points 12
16 to 24

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 24 to 28
15 to 17
Iron (Fe), % 52.9 to 64.8
69.6 to 76.4
Manganese (Mn), % 0 to 2.0
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 11 to 14
1.5 to 3.0
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030