IS 2062 E350 — Mild Steel (MS) Grade Specification, Properties & Equivalents
IS 2062 E350 is a high-strength structural steel grade conforming to the Bureau of Indian Standards (BIS). Specifically, 'E350' denotes a minimum yield strength of 350 MPa, making it a preferred choice for demanding construction and fabrication projects across India. This grade o
IS 2062 E350 is a high-strength structural steel grade conforming to the Bureau of Indian Standards (BIS). Specifically, 'E350' denotes a minimum yield strength of 350 MPa, making it a preferred choice for demanding construction and fabrication projects across India. This grade offers an excellent balance of strength, weldability, and formability, crucial for applications such as bridges, high-rise buildings, heavy machinery frames, and automotive chassis. Indian manufacturers like SAIL, JSW Steel, and RINL produce IS 2062 E350, ensuring its widespread availability in major industrial hubs like Mumbai, Pune, and Chennai. Its superior mechanical properties compared to lower-strength grades translate into lighter yet stronger structures, offering significant advantages in material efficiency and overall project cost-effectiveness for procurement engineers and fabricators nationwide. Quality assurance typically includes Mill Test Certificates (MTC) confirming compliance with specified chemical and mechanical properties.
Chemical Composition of IS 2062 E350
| Element / % range | IS 2062 E350 |
|---|---|
| Carbon (C) | 0.18 max |
| Manganese (Mn) | 1.50 max |
| Silicon (Si) | 0.40 max |
| Sulphur (S) | 0.050 max |
| Phosphorus (P) | 0.050 max |
Mechanical Properties of IS 2062 E350
| Property | Value (for thickness up to 16mm) |
|---|---|
| Minimum Yield Strength (MPa) | 350 |
| Minimum Tensile Strength (MPa) | 490 |
| Maximum Tensile Strength (MPa) | 620 |
| Minimum Elongation (%) | 22 |
| Hardness (Brinell) | Approx. 131-175 HB |
| Density (g/cm³) | 7.85 |
| Modulus of Elasticity (GPa) | 200-210 |
Available Forms in India for IS 2062 E350
| Shape | Typical Sizes / Thickness | Standard Length |
|---|---|---|
| Plates | 5 mm to 150 mm thickness | 6 meters, 12 meters (custom lengths on request) |
| Plates (Cut to Size) | As per fabrication drawing requirements | N/A |
| Hot Rolled Sheets/Strips | 2.0 mm to 12 mm thickness | Coils or cut lengths up to 6 meters |
| Structural Sections (I-Beams, Channels, Angles) | Various standard profiles (e.g., ISMB, ISMC, ISA) | 12 meters (standard) |
| Hot Rolled Bars/Rods | 10 mm to 50 mm diameter | 6 meters to 12 meters |
Real-world Applications for IS 2062 E350
- Structural Steelwork: Load-bearing beams, columns, and trusses in industrial buildings and infrastructure projects across India.
- Bridges & Flyovers: Construction of robust bridge decks, girders, and supporting structures by NHAI and PWD.
- Automotive Frames: Chassis and structural components for heavy-duty trucks and buses, requiring high yield strength.
- Equipment Manufacturing: Fabrication of heavy machinery frames, earthmoving equipment, and industrial plant structures.
- Storage Tanks: Construction of large industrial storage tanks and silos where structural integrity is paramount.
- Transmission Towers: Critical components for high-voltage electricity transmission towers, ensuring stability in diverse environmental conditions.
- Marine & Offshore: Hull structures and platforms for offshore exploration and support vessels, demanding high tensile strength.
- Construction Equipment: Fabrication of cranes, excavators, and other construction machinery parts needing wear resistance and strength.
Machinability & Weldability of IS 2062 E350
Machining IS 2062 E350 requires attention due to its higher strength compared to mild steel. Recommended cutting speeds for operations like turning and milling are generally lower, typically 50-70% of those used for lower carbon steels. Utilizing carbide tooling with a positive rake angle and ensuring ample coolant flow is advised to manage heat and tool wear effectively. Drilling can be performed using high-speed steel (HSS) or carbide-tipped drills, with a focus on chip management. For welding IS 2062 E350, preheating is crucial, especially for thicknesses exceeding 16mm or in environments with ambient temperatures below 10°C, to mitigate the risk of cold cracking. A preheat temperature range of 100-150°C is typical. Low-hydrogen electrodes (e.g., E7018 or equivalent) are recommended for shielded metal arc welding (SMAW). Gas Metal Arc Welding (GMAW) with appropriate shielding gas mixtures (e.g., Argon + CO2) also provides good results. IS 2062 E350 generally does not require post-weld heat treatment (PWHT) for most standard structural applications due to its optimized chemistry, simplifying fabrication processes for Indian fabricators. However, PWHT at around 550-600°C may be considered for very thick sections or specific service conditions requiring stress relief.Heat Treatment & Processing of IS 2062 E350
IS 2062 E350 is typically supplied in the as-rolled condition, leveraging the controlled rolling process for its mechanical properties. However, it can respond to further heat treatments. Annealing can be performed at temperatures around 860-900°C, followed by slow cooling, to refine the grain structure and improve toughness, especially after significant cold working or if a finer grain is desired. Normalizing, carried out at approximately 880-920°C with air cooling, also refines the grain structure and enhances uniformity, albeit with slightly higher strength and lower ductility than full annealing. Hardening and tempering are less common for IS 2062 E350 in its typical structural applications, but if required, it can be heated to around 840-900°C and quenched in oil or water, followed by tempering at 550-650°C to achieve specific hardness and strength combinations. The choice of processing depends heavily on the final application requirements and design specifications for components made from IS 2062 E350. Ensuring proper temperature control during any heat treatment is vital for achieving the desired properties and avoiding detrimental effects on the microstructure of IS 2062 E350.Sourcing IS 2062 E350 in India
IS 2062 E350 structural steel is readily available across India, with major manufacturers including SAIL (Steel Authority of India Limited), JSW Steel, TATA Steel, and RINL (Rashtriya Ispat Nigam Limited) supplying substantial quantities. Stockists and distributors in key industrial centers like Mumbai, Pune, Chennai, Delhi, and Ahmedabad maintain significant inventories. Availability is typically in forms like plates, sheets, structural sections (beams, channels), and bars. Minimum Order Quantities (MOQs) can vary; while large projects might procure directly from mills with MOQs in the hundreds of tonnes, smaller fabricators can often source required quantities from distributors with MOQs as low as 1 tonne, especially for standard sizes. The price band for IS 2062 E350 generally ranges from ₹60 to ₹75 per kilogram (INR/kg), dependent on market fluctuations, thickness, quantity, and specific mill source. Buyers must insist on a Mill Test Certificate (MTC) as per EN 10204 3.1, confirming the specific heat tested chemistry and mechanical properties for the supplied IS 2062 E350 batch. Price negotiation is common based on volume and contractual terms.International Equivalents for IS 2062 E350
| Standard | Code |
|---|---|
| Indian (IS) | IS 2062 E350 |
| ASTM (USA) | A572 Grade 50 / A656 Grade 80 |
| EN (Europe) | EN 10025-2 S355JR / S355J2 |
| JIS (Japan) | JIS G 3106 SM490A |
| DIN (Germany) | DIN 17100 St 52-3 |
FAQs about IS 2062 E350
What is IS 2062 E350 steel?
IS 2062 E350 is a structural steel grade specified by the Bureau of Indian Standards (BIS). The 'E350' designation indicates a minimum yield strength of 350 MPa (Megapascals) for thicknesses up to 16mm. This grade is widely used in India for constructing bridges, buildings, and heavy machinery due to its good weldability, formability, and high tensile properties. It offers a superior strength-to-weight ratio compared to lower grades, making it a cost-effective choice for demanding structural applications. IS 2062 E350 is a workhorse steel for infrastructure development in India.
What are the main applications of IS 2062 E350 in India?
The primary applications for IS 2062 E350 steel in India include building robust infrastructure like bridges, flyovers, and large industrial buildings. It's also extensively used in manufacturing heavy equipment, vehicle chassis (especially trucks and buses), transmission towers, and large storage tanks. Its excellent mechanical properties make it suitable for any application demanding high strength and reliable performance under load. Procurement teams often specify IS 2062 E350 for critical structural components.
Can IS 2062 E350 steel be welded?
Yes, IS 2062 E350 steel offers excellent weldability when proper procedures are followed. Preheating is generally recommended for thicker sections (above 16mm) and in colder ambient conditions to prevent hydrogen-induced cracking. Consumables with a lower hydrogen content are advised. Post-weld heat treatment (PWHT) is typically not required for IS 2062 E350 unless specified by the design code or application requirements, owing to its relatively low carbon equivalent, making fabrication straightforward for many Indian fabricators.
What are the minimum yield and tensile strength values for IS 2062 E350?
The minimum yield strength for IS 2062 E350 is 350 MPa for material up to 16mm thick. For thicknesses between 16mm and 40mm, the minimum yield strength is 335 MPa. For thicknesses between 40mm and 100mm, it is 325 MPa, and for 100mm to 250mm, it is 315 MPa. The minimum tensile strength (UTS) typically ranges from 490 to 620 MPa. These values are crucial for structural engineers in India when designing with IS 2062 E350.
What are the sourcing and quality assurance requirements for IS 2062 E350 in India?
Meeting the stringent quality requirements for IS 2062 E350 in India necessitates Mill Test Certificates (MTC) as per EN 10204 3.1. Positive Material Identification (PMI) is often requested, especially for critical applications like bridges or offshore structures, to verify the chemical composition matches the specified grade. Reputable Indian steel manufacturers like SAIL, JSW, and RINL provide these certifications as standard. Procurement departments must ensure MTCs are received with each supply batch.
Tags: grade, mild steel (ms), is 2062 e350