ST 52.3 Carbon Steel
We are ST 52.3 Carbon Steel Manufacturers, Suppliers, and Exporters in Mumbai, India. STEEL MART is an ISO 9001:2015 certified company established in 1986, with decades of experience in supplying high-quality carbon steel products to various industries. We specialize in manufacturing and supplying ST 52.3 Carbon Steels (DIN 17100 St52-3 / 1.0570 / EN 10025-2 S355J2 / S355N / 1.0577) that meet national and international quality standards for heavy structural engineering, offshore platforms, crane manufacturing, bridge construction, and mining equipment applications. ST 52.3 Carbon Steel is a German standard high-yield unalloyed structural steel known for its minimum yield strength of 355 MPa, tensile strength of 490-630 MPa, exceptional weldability, high impact toughness at sub-zero temperatures (-20°C), and reliable cold forming properties. With carbon content restricted below 0.20% and fine grain manganese-silicon structure, ST 52.3 allows effortless conventional welding while delivering 30% higher load capacity than standard St37 and St42 structural steels. ST 52.3 is typically supplied in normalized (St52-3N), control rolled, or hot rolled condition, ensuring uniform mechanical properties and long-term structural security. This carbon steel grade is widely used for manufacturing heavy beams, columns, bridge girders, offshore jacket structures, crane booms, hydraulic cylinder tubes, and machinery bases.
Our ST 52.3 Carbon Steels are 100% Prime – Tested & Guaranteed, ensuring precise chemical composition, dimensional accuracy, and consistent mechanical properties. Each product is supplied with proper Mill Test Certificates (MTC) confirming compliance with DIN / EN standards. STEEL MART follows strict quality control procedures and ensures timely delivery.
What is ST 52.3 Carbon Steel?
ST 52.3 Carbon Steel (DIN 17100 St52-3 / 1.0570 / EN 10025-2 S355J2 / S355N / 1.0577) is an unalloyed high-yield structural steel grade suitable for heavy construction, offshore platforms, cranes, bridges, and hydraulic cylinders requiring high yield strength (355 MPa Min), excellent sub-zero impact toughness (-20°C), and superior weldability. Supplied in normalized (St52-3N), control rolled, or hot rolled plates, bars, and seamless tubes, it provides exceptional load-bearing performance.
355 MPa Yield Strength
Guarantees minimum yield strength of 355 MPa for heavy structural load bearing capacity.
Exceptional Weldability
Low carbon equivalent enables seamless welding with SMAW, GMAW, and SAW methods.
High Formability
Allows cold bending, shearing, pressing, and hole punching without structural degradation.
Charpy Sub-Zero Toughness
Tested for Charpy V-notch impact toughness (27 J at -20°C) for extreme cold operations.
Normalized (St52-3N) Finish
Fine grain structure ensures high fatigue resistance and superior notch toughness.
Full Traceability
Supplied with complete chemical heat analysis and EN 10204 3.1 Mill Test Certificates.
Why Choose STEEL MART for ST 52.3 Carbon Steel
STEEL MART is the preferred choice for purchasing ST 52.3 Carbon Steel due to its strong reputation for quality and reliability. With over 40 years of experience in the steel industry, the company ensures that every product meets strict industry standards. The company follows strict quality inspection procedures to ensure that every ST 52.3 Carbon Steel product meets international standards.
Each product is carefully tested to ensure durability, strength, and performance. Customers trust STEEL MART for consistent quality, competitive pricing, and timely delivery. The company maintains a large inventory to meet urgent and bulk requirements efficiently. In addition to ST 52.3 Carbon Steels, STEEL MART also supplies a wide range of carbon steel and alloy steel products for various industrial applications.
Chemical Composition of ST 52.3 Carbon Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 % Max |
| Manganese (Mn) | 1.60 % Max |
| Silicon (Si) | 0.55 % Max |
| Sulphur (S) | 0.035 % Max |
| Phosphorus (P) | 0.035 % Max |
This chemical composition ensures optimal strength, yield resistance, and weldability.
Equivalent Grades of ST 52.3 Carbon Steel
| Standard | Equivalent Grade |
|---|---|
| DIN 17100 | St52-3 / St52-3N / 1.0570 |
| EN 10025-2 | S355J2 / S355J2G3 / S355N / 1.0577 |
| BS 4360 | 50D / 50DD |
| ASTM | A572 Grade 50 |
| IS | IS 2062 E350 / Fe 490 |
These equivalent grades ensure global compatibility across projects.
Mechanical Properties of ST 52.3 Carbon Steel
The mechanical properties of ST 52.3 Carbon Steels make them suitable for heavy-duty load-bearing structural and engineering fabrications. In normalized (St52-3N) condition, this grade delivers guaranteed minimum 355 MPa yield strength and high impact toughness.
Heat Treatment & Processing of ST 52.3 Carbon Steel
ST 52.3 Carbon Steels can be processed using standard heat treatment techniques.
Normalizing (St52-3N)
Heated to 890°C–930°C and air-cooled to refine grain structure and impact resistance.
Annealing
Heated to 850°C–890°C for maximum cold formability.
Stress Relieving
Heated to 550°C–650°C to remove residual welding and flame cutting stresses.
Flame / Plasma Cutting
Easily cut into custom structural shapes, flanges, and profiled plates.
ST 52.3 Carbon Steel Industry Applications
ST 52.3 Carbon Steels are widely used across multiple industrial sectors.
Construction & High-Rise
Used for heavy structural columns, main beams, baseplates, and trusses.
Bridge Engineering
Used in bridge girders, stiffener plates, and overpass supports.
Crane & Lifting Equipment
Used for crane booms, excavator arms, and heavy chassis frames.
Hydraulic Cylinder Tubes
Used for honeable hydraulic cylinders, honed tubes, and barrel assemblies.
Mining & Earthmoving
Used in crusher frames, dump truck bodies, and shovel booms.
Offshore & Energy
Used for platform legs, jacket structures, and heavy flanges.
Availability and Customization
At STEEL MART, we supply ST 52.3 Carbon Steels in a wide range of sizes and specifications.
| Thickness / Size | Plates from 3 mm to 300 mm, bars from 10 mm to 450 mm, honed tubes |
| Condition | Available in As-Rolled / Normalized (St52-3N) / Control Rolled condition |
| Length | Standard lengths from 3 meters to 12 meters |
| Forms | Plates, Sheets, Round Bars, Flat Bars, Channels, Angles, Beams, Seamless Tubes |
| Customization | Custom cut sizes, profiling, and beveling available as per drawings |
| Services | Plasma cutting, laser cutting, shearing, and drilling available |
| Certification | Supplied with Mill Test Certificates and inspection reports |
Our strict quality control ensures consistent quality.
Enquire For Rates ✉
Submit your specific requirements to get instant price quotes directly from Steel Mart Mumbai.
GET INSTANT PRICE QUOTEConclusion
ST 52.3 Carbon Steel (DIN 17100 St52-3 / 1.0570 / EN 10025-2 S355J2 / S355N / 1.0577) is a highly reliable unalloyed high-yield structural steel widely specified across heavy construction, offshore structures, bridge engineering, hydraulic cylinders, and crane manufacturing. Featuring 355 MPa minimum yield strength, exceptional weldability, and superior sub-zero impact toughness (-20°C), it provides long-term structural security for columns, beams, girders, plates, and heavy machinery frames. Supplied by STEEL MART with strict quality control and Mill Test Certification, ST 52.3 Carbon Steel is a cost-effective and dependable solution for engineering applications.
Frequently Asked Questions
Common answers regarding ST 52.3 Carbon Steel specifications and parameters.
ST 52.3 (St52-3N) provides a guaranteed minimum yield strength of 355 MPa.
The suffix "3" signifies fully killed steel with guaranteed sub-zero impact toughness (27 J at -20°C).
DIN 17100 St52-3 / 1.0570, EN 10025-2 S355J2 / S355N (1.0577), BS 4360 50D, ASTM A572 Gr 50, and IS 2062 E350.
Yes, its low carbon equivalent allows all standard conventional welding processes without pre-heating.
Plates, Sheets, Round Bars, Flat Bars, Angles, Channels, I-Beams, Honed Hydraulic Tubes, and custom cut sizes.