Description
EN353 – Bright Bar Grade Introduction:
EN353 is an alloy steel grade known for its high strength and hardness, commonly used in manufacturing machinery and automotive components. It is made from prime quality billets and blooms to ensure high internal and external strength. This alloy steel is typically hardened and tempered, containing nickel, chromium, and molybdenum, providing high tensile strength, ductility, and wear resistance. With its relatively good impact properties even at low temperatures, EN353 is ideal for applications requiring both durability and strength.
EN353 – Bright Bar Grade Application:
EN353 steel bright bars are used in various automotive and heavy-duty applications, including:
- Heavy-duty gears
- Shafts
- Pinions
- Camshafts
- Gudgeon pins
EN353 – Bright Bar Equivalent Grades:
- BRITISH BS 970:1991: 815M17
- GERMAN DIN: 20NiCrMo5
- FRENCH AFNOR: 20NCD5
- SWEDISH SS: 2523
- EUROPEAN STEEL NAME: 17NiCrMoS6-4
- EUROPEAN STANDARD: EN10277-4
EN353 – Bright Bar Chemical Composition:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.10-0.20 |
| Silicon (Si) | 0.10-0.35 |
| Manganese (Mn) | 0.50-1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.040 |
| Chromium (Cr) | 0.75-1.25 |
| Molybdenum (Mo) | 0.08-0.15 |
| Nickel (Ni) | 1.00-1.50 |
EN353 – Bright Bar Mechanical Properties:
| Property | Value |
|---|---|
| Hardening | 840-870°C |
| Quenching | Oil |
| Tempering | 150-200°C |
| Hardness (Brinell) | 150-200 |
| Tensile Strength (MPa) | 680-1280 (depending on ruling section) |
| Yield Stress (MPa) | 440-1050 (depending on ruling section) |
| Elongation (%) | 10-22% (depending on ruling section) |
| ISO V Impact (Joules) | 7-30 (depending on section size) |
EN353 – Bright Bar Hardness:
- Hardness: HB 270
EN353 – Bright Bar Heat Treatment:
The standard hardening treatment for EN353 steel includes heating to a specific temperature and cooling it rapidly through oil quenching. The steel is then tempered to achieve the desired mechanical properties.
EN353 – Bright Bar Hardening:
- Hardening Temperature: 780-820°C
EN353 – Bright Bar Tempering:
- Tempering Temperature: 150-200°C
- Hardness After Tempering: 62-64 HRC
EN353 – Bright Bar Physical Properties:
| Property | Value |
|---|---|
| Density (g/cm³) | 8.08 |
| Density (lb/in³) | 0.292 |
| Thermal Conductivity (W/(m*K)) | 11.3 – 14.5 (at different temperatures) |
EN353 – Bright Bar Thermal Properties:
EN353 steel has good thermal conductivity, making it suitable for high-temperature applications.
EN353 – Bright Bar Forging Properties:
EN353 bright bars are known for their excellent combination of ductility, strength, and wear resistance. These properties make them ideal for heavy-duty applications such as gears and shafts.
EN353 – Bright Bar Stress Relieving:
- Stress Relieving Temperature: 150-200°C
- Pre-heating steps at 400°C, followed by heating between 780-805°C.
EN353 – Bright Bar Normalizing:
Normalizing processes enhance the mechanical properties by heating to a specific temperature followed by air cooling.
EN353 – Bright Bar Annealing:
- Annealing Temperature: 630-670°C
EN353 – Bright Bar Machinability:
- Machinability Rating: 75 (good machinability)
EN353 – Bright Bar Welding:
EN353 bright bars can be welded using conventional welding methods, but care must be taken to ensure the quality and durability of the welded joints.
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