ASTM A148 Grade 130-115 vs. ASTM A148 Grade 135-125
Both ASTM A148 grade 130-115 and ASTM A148 grade 135-125 are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is ASTM A148 grade 130-115 and the bottom bar is ASTM A148 grade 135-125.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 310 | |
320 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 13 | |
10 |
Fatigue Strength, MPa | 560 | |
590 |
Poisson's Ratio | 0.29 | |
0.29 |
Reduction in Area, % | 28 | |
25 |
Shear Modulus, GPa | 73 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 1020 | |
1060 |
Tensile Strength: Yield (Proof), MPa | 890 | |
960 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 420 | |
420 |
Melting Completion (Liquidus), °C | 1460 | |
1460 |
Melting Onset (Solidus), °C | 1420 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 39 | |
39 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
7.4 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.5 | |
8.5 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.7 | |
2.7 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
1.5 |
Embodied Energy, MJ/kg | 20 | |
20 |
Embodied Water, L/kg | 50 | |
50 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
110 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 2110 | |
2470 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 36 | |
38 |
Strength to Weight: Bending, points | 29 | |
29 |
Thermal Diffusivity, mm2/s | 10 | |
10 |
Thermal Shock Resistance, points | 30 | |
31 |
Alloy Composition
Carbon (C), % | 0.25 to 0.35 | |
0.25 to 0.35 |
Chromium (Cr), % | 0.4 to 0.8 | |
0.4 to 0.8 |
Iron (Fe), % | 96.1 to 98.2 | |
96.1 to 98.2 |
Manganese (Mn), % | 0.6 to 1.0 | |
0.6 to 1.0 |
Molybdenum (Mo), % | 0.15 to 0.3 | |
0.15 to 0.3 |
Nickel (Ni), % | 0.4 to 0.8 | |
0.4 to 0.8 |
Phosphorus (P), % | 0 to 0.050 | |
0 to 0.050 |
Silicon (Si), % | 0 to 0.6 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.060 | |
0 to 0.060 |