EN48 steel is a high-grade medium carbon alloy steel, revered in India's industrial sectors for its superior combination of toughness, ductility, and high tensile strength. This makes EN48 a preferred choice for critical components subjected to significant shock, impact, and wear, particularly within the automotive and heavy machinery manufacturing segments. Industries across India rely on EN48 for its consistent performance under demanding operational conditions, ensuring the longevity and reliability of vital engineering parts. The material's specific alloying elements contribute to its hardenability, allowing for a fine grain structure and enhanced mechanical properties after heat treatment, a crucial factor for applications requiring precision and durability. MetaleMart connects you with leading Indian producers and stockists of EN48 steel, ensuring a seamless procurement process with readily available material and essential documentation like Material Test Certificates (MTC).
Chemical Composition of EN48
EN48 Chemical Composition (%)
| Element | Percentage |
| Carbon (C) | 0.40 - 0.50 |
| Manganese (Mn) | 0.70 - 1.00 |
| Silicon (Si) | 0.10 - 0.35 |
| Phosphorus (P) | Max 0.050 |
| Sulphur (S) | Max 0.050 |
| Chromium (Cr) | 0.90 - 1.40 |
| Molybdenum (Mo) | 0.20 - 0.35 |
Mechanical Properties of EN48
EN48 Mechanical Properties
| Property | Value (Approximate, Oil Quenched & Tempered) |
| Ultimate Tensile Strength (UTS) | 650-800 MPa |
| Yield Strength (YS) | 380-550 MPa |
| Elongation at Break | 15-20% |
| Impact Strength (Izod/Charpy) | High |
| Hardness (Brinell) | 190-240 HB |
| Density | 7.85 g/cm³ |
| Modulus of Elasticity | 200 GPa |
EN48 Steel Available Forms in India
| Shape | Typical Sizes | Standard Length |
| Rounds (Hot Rolled/Forged) | 15 mm - 250 mm Diameter | 6-7 Meters |
| Bars (Cold Drawn) | 10 mm - 80 mm Diameter | 3-5 Meters |
| Shafts/Forgings | Custom | Custom |
| Plates/Sheets | 5 mm - 50 mm Thickness | As per customer specification |
EN48 Steel Real-world Applications
- Automotive Industry: Crankshafts, connecting rods, gears, and axle shafts requiring high impact resistance.
- Heavy Machinery: Heavy-duty gears, high-stress shafts, and critical pins for construction and mining equipment.
- Aerospace: Landing gear components and high-strength fasteners where reliability is paramount.
- Manufacturing: Specialized tooling, press components, and high-wear parts.
- Oil & Gas: Drill collars and high-stress connectors due to EN48
EN48 Steel Machinability & Weldability
Machining EN48 steel is feasible, though it requires careful consideration of its medium-carbon alloyed nature. It is best machined in the annealed or normalized condition to achieve optimal cutting speeds and tool life. Whenmachining EN48 in the hardened and tempered state, lower speeds and robust tooling are essential. Carbide-tipped tools are generally recommended, utilizing coolants for efficient chip removal and preventing overheating. Common machining operations for EN48 include turning, milling, drilling, and tapping. Weldability of EN48 steel is considered moderate. Preheating EN48 to around 200-300°C is advisable to minimize the risk of hydrogen-induced cracking, especially in thicker sections. Low-hydrogen welding consumables (e.g., E7018, E8018 for coated electrodes, or suitable MIG/TIG wires) should be employed. Post-weld heat treatment (PWHT), typically involving stress relieving at 550-650°C, is crucial to restore the microstructure and mechanical properties around the weld zone, ensuring the integrity of the fabricated EN48 component.
EN48 Steel Heat Treatment & Processing
Heat treatment is critical for unlocking the full potential of EN48 steel. Annealing EN48 involves heating to 650-700°C followed by slow furnace cooling, resulting in a softer microstructure for ease of machining, with a hardness typically below 240 HB. Normalizing EN48 is done by heating to 840-870°C and air cooling, refining the grain structure and improving uniformity. Hardening of EN48 is achieved through oil quenching from a temperature of 820-860°C, creating a martensitic structure. Tempering EN48 follows hardening and is crucial for reducing brittleness and achieving the desired toughness and tensile strength; temperatures typically range from 500°C to 650°C, depending on the target mechanical properties, with higher tempering temperatures yielding greater ductility and lower hardness. The exact EN48 processing parameters must be tailored to the specific application requirements and section size.
Sourcing EN48 Steel in India
EN48 steel is readily sourced across India, with major producers like SAIL, JSW Steel, and RINL offering various forms. Stockholders in industrial hubs such as Mumbai, Pune, and Chennai maintain significant inventory of EN48 rounds and bars, catering to diverse order volumes. Minimum Order Quantities (MOQs) for standard EN48 products typically range from 1 to 5 metric tons from larger mills, while smaller quantities (0.5 to 1 ton) are often available off-the-shelf from regional distributors. The price band for EN48 steel in India fluctuates based on market conditions, form, and quantity, generally falling between INR 70 to INR 110 per kilogram. It is standard practice to request comprehensive Material Test Certificates (MTC) conforming to IS 2002 standards or equivalent international specifications, ensuring full traceability and quality compliance for every EN48 batch procured.
EN48 Steel International Equivalents
| IS | ASTM | EN | JIS | DIN | GOST |
| - | - | 1567 / 1.1731 | S45C (similar but not identical) | C45Cr2 / 1.7131 (close match) | 40Kh |
| IS 1570 45C8 (similar but not direct) | 1045 / AISI 1045 (similar but not direct) | - | - | C45 (similar but not direct) | - |
FAQs about EN48
What is the primary advantage of using EN48 steel?
The primary advantage of EN48 steel lies in its excellent combination of high tensile strength, toughness, and fatigue resistance. This makes EN48 particularly suitable for components that experience significant shock loads and stress, ensuring durability and reliability in demanding applications common in India's automotive and heavy engineering sectors. Its hardenability allows it to achieve superior mechanical properties post-heat treatment.
Is EN48 steel suitable for high-temperature applications?
While EN48 steel possesses good mechanical properties at moderate temperatures, it is not primarily designed for sustained high-temperature service. Its strength and toughness, achieved through heat treatment, are optimized for ambient to moderately elevated temperatures. For applications exceeding 400-450°C, alternative alloy steels with superior high-temperature creep resistance, such as certain stainless steels or nickel-based alloys, would be more appropriate than EN48.
What is the typical hardness range for EN48 steel after heat treatment?
After proper oil quenching and tempering, EN48 steel typically achieves a hardness in the range of 190 to 240 HB (Brinell Hardness). However, depending on the specific tempering temperature employed post-quenching, this value can be adjusted to meet different application requirements. For instance, lower tempering temperatures will result in higher hardness values for the EN48 steel.
Where can I source EN48 steel in India with MTC?
EN48 steel with Material Test Certificates (MTC) is readily available from authorized stockists and manufacturers across India, particularly in major industrial hubs like Mumbai, Pune, and Chennai. Reputable suppliers listed on MetaleMart ensure that all supplied EN48 steel batches are accompanied by MTCs detailing chemical composition and mechanical properties as per relevant standards (e.g., IS 2002 or EN specifications).
Can EN48 steel be used for gears and shafts?
Yes, EN48 steel is highly suitable for manufacturing gears and shafts. Its medium carbon content, coupled with alloying elements like chromium and molybdenum, provides the necessary strength, toughness, and wear resistance required for these critical components. EN48 is frequently heat-treated (hardened and tempered) to achieve the optimal balance of core toughness and surface hardness for gears and shafts in automotive and heavy machinery.
What is the difference between EN48 and EN8 steel?
EN48 steel is an alloy steel with added chromium and molybdenum, offering superior hardenability, tensile strength, and toughness compared to EN8 (a plain medium carbon steel). EN8 is more commonly used for general-purpose applications requiring moderate strength. EN48 is specified for more demanding applications where higher performance under shock and stress is critical, such as in heavy-duty automotive components.