Description
EN29B Alloy Steel Introduction:
EN29B is a high-strength alloy steel known for its exceptional toughness, wear resistance, and durability. It contains alloying elements like nickel, chromium, and molybdenum, which impart superior mechanical properties compared to other standard steels. EN29B is typically supplied in hardened and tempered conditions, making it an ideal material for components subjected to high levels of stress, wear, and heavy-duty applications.
Due to its high nickel and chromium content, EN29B provides excellent fatigue resistance and maintains high tensile strength under challenging conditions. This steel is widely used in applications where components are subjected to repeated loading, impact, and high levels of wear.
EN29B Alloy Steel Application:
EN29B alloy steel is used in industries where high strength and wear resistance are critical. Common applications include:
- Automotive Components: Drive shafts, gears, and crankshafts.
- Engineering Components: Heavy-duty axles, spindles, and couplings.
- Oil and Gas: Drilling tools, drill collars, and valve stems.
- Aerospace Industry: High-strength structural parts.
- Tooling: Forging dies, cutting tools, and other high-stress tools.
- Power Generation: Turbine blades, connecting rods, and generator components.
EN29B Alloy Steel Equivalent Grades:
| Standard | Equivalent Grade |
|---|---|
| BS970 | EN29B |
| AISI/SAE | 4340 |
| DIN | 1.6582 |
| JIS | SNCM439 |
| UNS | G43400 |
EN29B Alloy Steel Chemical Composition:
The table below shows the chemical composition of EN29B alloy steel:
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38-0.43 |
| Silicon (Si) | 0.10-0.35 |
| Manganese (Mn) | 0.50-0.80 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Chromium (Cr) | 0.60-0.80 |
| Nickel (Ni) | 1.30-1.80 |
| Molybdenum (Mo) | 0.15-0.30 |
EN29B Alloy Steel Mechanical Properties:
EN29B is characterized by its high tensile strength, toughness, and wear resistance. Below are the mechanical properties:
| Property | Value (Typical) |
|---|---|
| Tensile Strength (MPa) | 930 – 1080 |
| Yield Strength (MPa) | 680 |
| Elongation (%) | 13 |
| Hardness (HB) | 248 – 302 |
| Impact Toughness (J) | 30 (at 20°C) |
EN29B Alloy Steel Heat Treatment:
The heat treatment process plays a crucial role in enhancing the mechanical properties of EN29B alloy steel.
- Annealing: Heat to 800-850°C, hold until temperature is uniform, then cool slowly in the furnace.
- Hardening: Heat to 830-860°C, quench in oil or water for parts with high-stress requirements.
- Tempering: Temper at 450-650°C depending on the desired mechanical properties. Higher tempering temperatures result in greater toughness but lower hardness.
EN29B Alloy Steel Hardness:
The typical hardness of EN29B in its hardened condition is around 248-302 HB. Post-tempering, the hardness is typically in the range of 200-280 HB, depending on the tempering temperature.
EN29B Alloy Steel Physical Properties:
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Thermal Conductivity | 42 W/m·K (at 20°C) |
| Specific Heat Capacity | 486 J/kg·K |
| Modulus of Elasticity | 200 GPa |
EN29B Alloy Steel Forging Properties:
EN29B can be forged at a temperature between 850°C to 1150°C. After forging, it is recommended to cool the material slowly in the furnace to avoid creating internal stresses that may lead to cracking.
EN29B Alloy Steel Machinability:
EN29B alloy steel has good machinability in the annealed condition. The alloy’s high toughness and wear resistance make it suitable for complex machining operations such as turning, drilling, and milling.
EN29B Alloy Steel Welding:
Welding of EN29B is not typically recommended due to the high risk of cracking and distortion. However, if welding is necessary, it should be preheated to 200-300°C and post-weld heat treated to relieve stresses.
EN29B Alloy Steel Stress Relieving:
After heavy machining or heat treatment, EN29B may undergo stress relieving at 600-650°C. The part should be heated slowly, allowed to equalize, and then cooled in the furnace to minimize residual stresses.
EN29B Alloy Steel Normalizing:
Normalizing is typically performed at 850-900°C for EN29B. The process involves heating the steel to the desired temperature, followed by air cooling. Normalizing refines the grain structure and enhances mechanical properties.
EN29B Alloy Steel Applications:
- Automotive Industry: Drive shafts, connecting rods, gears, and axles.
- Aerospace Industry: High-strength components such as landing gear and structural members.
- Engineering: Forging dies, spindles, hydraulic shafts, and heavy-duty machinery parts.
- Tooling: Molds, punches, and other high-stress tools.
- Oil and Gas Industry: Drill collars, valve stems, and wellhead components.
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka, Ghaziabad Kolkata.
