ASTM A29/A29M 1146 Introduce
ASTM A29/A29M 1146 is a steel specification that covers both alloy and carbon steel grade bars. It is one of the oldest and most preeminent standards for steel bar quality and is widely accepted worldwide in many different industries. The ASTM A29/A29M standard embodies the best of alloy steel qualities, and its detailed, testing and documentation requirements ensure that quality is maintained across the spectrum of usage.
Smelting temperature:1714°C - 1999°C
Application:Hot forged and cold worked carbon steel and alloy steel rods
ASTM A29/A29M 1146 Material Chemical Composition
The chemical composition of the ASTM A29/A29M 1146 steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | 0.0800 | 0.1300 |
| Manganese (Mn) | 0.7000 | 1.0000 |
| Carbon (C) | 0.4200 | 0.4900 |
ASTM A29/A29M 1146 Material Mechanical Properties
Hardness is one of the most important mechanical properties of ASTM A29/A29M 1146 steel. The hardness of this alloy can range from 40 to 60 HRC, depending on the grade of steel and the heat treatment. This hardness provides good wear resistance, making it suitable for applications that require abrasive resistance
The mechanical properties of the ASTM A29/A29M 1146 steel are as follows:
| YieldRp0.2 | ≤ 211 (MPa) |
| TeileRm | ≤ 737 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 312 |
ASTM A29/A29M 1146 Material Thermal Properties
The thermal performance parameters of the ASTM A29/A29M 1146 steel are as follows:
| Temperature (°C) | 32 | 191 | 377 |
| Modulus of elasticity (GPa) | - | 954 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 31 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 444 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 442 |
| Poisson’s coefficient, ν | - | - | 232 |
ASTM A29/A29M 1146 Material Machining Technology
When machining ASTM A29/A29M 1146 steel, the cutting parameters must be set correctly in order to ensure satisfactory results. The cutting speed is usually between 20 to 50 meters/minute (760 to 1,967 feet/minute). The feed rate should usually be between 0.05 and 0.2 millimeters/revolution (0.002 to 0.007 in/rev). The cutting depth will depend on the tool being used, but typically ranges between 2 to 5 millimeters (0.078 to 0.19 in).