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ASTM B817 Type I vs. ASTM Grade HP Steel

ASTM B817 type I belongs to the titanium alloys classification, while ASTM grade HP steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM B817 type I and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 4.0 to 13
5.1
Fatigue Strength, MPa 360 to 520
130
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
78
Tensile Strength: Ultimate (UTS), MPa 770 to 960
490
Tensile Strength: Yield (Proof), MPa 700 to 860
260

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Maximum Temperature: Mechanical, °C 340
1100
Melting Completion (Liquidus), °C 1600
1370
Melting Onset (Solidus), °C 1550
1330
Specific Heat Capacity, J/kg-K 560
480
Thermal Conductivity, W/m-K 7.1
12
Thermal Expansion, µm/m-K 9.6
16

Otherwise Unclassified Properties

Base Metal Price, % relative 36
34
Density, g/cm3 4.4
7.9
Embodied Carbon, kg CO2/kg material 38
5.8
Embodied Energy, MJ/kg 610
82
Embodied Water, L/kg 200
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
21
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 48 to 60
17
Strength to Weight: Bending, points 42 to 49
17
Thermal Diffusivity, mm2/s 2.9
3.2
Thermal Shock Resistance, points 54 to 68
11

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0.35 to 0.75
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
24 to 28
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
29.2 to 42.7
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
33 to 37
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 2.5
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 87 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0