4140 Round Bar Round Bar in South Africa
4140 Round Bar Round Bar in South Africa is a high-strength alloy steel product widely used in various industrial applications due to its excellent mechanical properties and versatility. This chromium-molybdenum steel grade offers superior toughness, wear resistance, and fatigue strength, making it ideal for manufacturing components that require durability under high stress. Available in multiple diameters and lengths, these bars are precision-engineered to meet stringent quality standards, ensuring consistent performance across different sectors.
Typically supplied in a hot-rolled or cold-finished condition, these bars exhibit a fine grain structure that enhances machinability and heat treatment responsiveness. The materialβs chemical composition, including elements like carbon, chromium, molybdenum, and manganese, contributes to its hardenability and ability to retain strength at elevated temperatures. This makes it a preferred choice for gears, shafts, bolts, and other critical parts in automotive, aerospace, and heavy machinery industries.
Manufacturers and fabricators in South Africa benefit from reliable local availability combined with export capabilities, allowing seamless integration into global supply chains. The product is often certified to comply with international standards such as ASTM A29 and EN 10083, ensuring it meets rigorous requirements for mechanical properties and dimensional tolerances. This certification facilitates confidence among international buyers looking for quality-assured alloy steel bars for their engineering projects.
In terms of applications, these alloy steel bars are extensively used in the production of high-stress components like crankshafts, connecting rods, and hydraulic parts. Their excellent weldability and heat treatment options provide flexibility in manufacturing processes, enabling customized solutions tailored to specific operational demands. Additionally, the corrosion resistance traits of 4140 steel contribute to longer service life, especially in harsh industrial environments.
Export-ready inventory of these round bars ensures timely delivery and support for global industrial buyers requiring robust raw materials for fabrication and assembly. The combination of mechanical strength, precision manufacturing, and compliance with international standards positions this product as a reliable choice for engineering firms and OEMs seeking dependable alloy steel components from South Africa.
Our Approvals | Third Party Inspection
Lead Time
2β7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why 4140 Round Bar Round Bar in South Africa Are Preferred by Global Buyers
- β Factory Pricing: Direct manufacturer rates with bulk stock
- β Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- β Export-Ready: Sea-worthy packaging for on-time delivery
- β Fast RFQs: Quick quotes for custom sizes & quantities
- β Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 500 MT / Month
- Export Experience: 50+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is 4140 Round Bar Round Bar in South Africa
- 2. How to Choose the Right Manufacturer
- 3.Comparison of 4140 Round Bar Round Bar in South Africa
- 4. Why Global Buyers Source from Super Metal Manufacturing Co.
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21.Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Super Metal Manufacturing Co.
How to Choose the Right 4140 Round Bar Round Bar in South Africa
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among 4140 Round Bar Round Bar in South Africa
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Super Metal Manufacturing Co.
Super Metal Manufacturing Co. is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15β20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of 4140 Round Bar
- β High tensile strength for demanding applications
- β Excellent hardenability and wear resistance
- β Good machinability for precision fabrication
- β Versatile use in automotive and structural components
- β Enhanced toughness in different heat treatment processes
- β Available in various sizes and lengths for custom projects
Technical Overview of 4140 Round Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.20-0.35% Cr, 0.04-0.10% Mo | Used in structural applications, automotive components, and machinery parts due to its high toughness and strength. | ASTM A829, ASTM A36, SAE J403 |
| 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.20-0.35% Cr, 0.04-0.10% Mo | Ideal for manufacturing gears, axles, and crankshafts that require high tensile strength and wear resistance. | ASTM A829, ASTM A36, SAE J403 |
| 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.20-0.35% Cr, 0.04-0.10% Mo | Commonly used in the production of high-stress components in the oil and gas industry. | ASTM A829, ASTM A36, SAE J403 |
Specifications Table
| Material | 4140 Steel |
|---|---|
| Grades | AISI 4140 |
| Standard | ASTM A829 |
| Size Range | 20 mm to 300 mm Diameter |
| Length | 3 m to 6 m |
| Form | Round Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| 4140 Round Bar | C: 0.38 - 0.43%, Mn: 0.75 - 1.00%, Cr: 0.80 - 1.10%, Mo: 0.15 - 0.25% | Used in the manufacturing of automotive components, gears, and heavy machinery. |
| 4140 HT Round Bar | C: 0.38 - 0.43%, Mn: 0.75 - 1.00%, Cr: 0.80 - 1.10%, Mo: 0.15 - 0.25% | Ideal for high-stress applications such as shafts, bolts, and fittings. |
| 4140 QT Round Bar | C: 0.38 - 0.43%, Mn: 0.75 - 1.00%, Cr: 0.80 - 1.10%, Mo: 0.15 - 0.25% | Suitable for critical components in aerospace and military applications. |
| 4140 Alloy Round Bar | C: 0.38 - 0.43%, Mn: 0.75 - 1.00%, Cr: 0.80 - 1.10%, Mo: 0.15 - 0.25% | Commonly used in the fabrication of tools and dies. |
| 4140 Pre-Hardened Round Bar | C: 0.38 - 0.43%, Mn: 0.75 - 1.00%, Cr: 0.80 - 1.10%, Mo: 0.15 - 0.25% | Used in applications requiring moderate hardness and wear resistance. |
Available Sizes of 4140 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 | 25 |
| 30 | 35 |
| 40 | 45 |
| 50 | 55 |
| 60 | 65 |
| 70 | 75 |
| 80 | 85 |
| 90 | 95 |
| 100 | 110 |
| 120 | 130 |
Chemical Properties of 4140 Round Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Phosphorus (P) | max 0.04 |
| Sulfur (S) | max 0.04 |
| Iron (Fe) | Balance |
Mechanical Properties of 4140 Round Bar
| Property | Value |
|---|---|
| Tensile Strength | 655 MPa (95 ksi) |
| Yield Strength | 415 MPa (60 ksi) |
| Elongation | 20% |
| Hardness (Brinell) | 207 HB |
| Impact Toughness | 35 J at -20Β°C |
4140 Round Bar β Physical & Thermal Properties
Density of 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cmΒ³ | 0.284 lb/inΒ³ |
Melting Point of 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1420-1540 Β°C | 2600-2800 Β°F |
Specific Heat of 4140 Round Bar
| Specific Heat of 4140 Round Bar | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 460 | 20-100 | Annealed |
| 480 | 100-300 | Tempered |
| 490 | 300-500 | Quenched |
Electrical Resistivity of 4140 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 70 | 20 | Annealed |
| 75 | 100 | |
| 80 | 200 | |
| 85 | 300 | |
| 90 | 400 | |
Equivalent of 4140 Round Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A829 | 42CrMo4 | S41400 |
| SAE J403 | 4140 | S41400 |
Manufacturing Process & Heat Treatment of 4140 Round Bar
Annealing
Annealing of 4140 round bar involves heating the steel to a temperature range of 850-900Β°C, followed by controlled cooling. This process relieves internal stresses, refines the grain structure, and improves machinability, making it easier to work with in subsequent manufacturing processes.
Forging
Forging of 4140 round bar is typically conducted at temperatures between 1100-1250Β°C. This hot working process enhances the mechanical properties of the steel by aligning the grain structure and increasing its strength and toughness. The forged bars are then allowed to cool gradually to room temperature.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-880 | Oil or Water | To increase hardness and strength by transforming austenite into martensite. |
| Tempering | 400-700 | Air | To reduce brittleness and relieve stresses while maintaining desired hardness. |
| Stress Relieving | 600-650 | Air | To reduce residual stresses from machining and previous heat treatments. |
The manufacturing and heat treatment processes for 4140 round bar are critical in achieving the desired mechanical properties for various industrial applications, ensuring high performance and reliability in service.
Various Types
4140 Round Bar - Standard
- Diameter: 20mm to 300mm
- Condition: Hot Rolled, Annealed
- Applications: Automotive components, machinery parts, and tools
4140 Round Bar - Cold Drawn
- Diameter: 10mm to 100mm
- Condition: Cold Drawn, Heat Treated
- Applications: High-stress applications, hydraulic cylinders, and shafts
4140 Round Bar - Quenched and Tempered
- Diameter: 25mm to 200mm
- Condition: Quenched and Tempered
- Applications: Heavy machinery, structural components, and oilfield equipment
4140 Round Bar - Precision Ground
- Diameter: 15mm to 150mm
- Condition: Precision Ground
- Applications: Aerospace components, automotive parts, and precision instruments
Applications & Uses
- Oil & Gas Industry
- Petrochemical Plants
- Water Treatment Plants
- Pharmaceutical Industry
- Food & Beverage Industry
- Automobile Industry
Industries We Serve
Our alloys are widely used across:
- Steel Plants
- Foundries & Casting Units
- Automobile Industry
- Shipbuilding & Marine
- Oil & Gas
- Engineering Components
- Heavy Industrial Machinery
latest Price List of 4140 Round Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| 4140 Round Bar | 3 mm | $2.50 β $2.80 | βΉ207 β βΉ232 |
| 4140 Round Bar | 6 mm | $2.40 β $2.70 | βΉ199 β βΉ224 |
| 4140 Round Bar | 10 mm | $2.30 β $2.60 | βΉ192 β βΉ216 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for 4140 Round Bar.
MOQ & Payment Terms
Minimum Order Quantity: 25β100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
Cities We Suppllied In India
| Supply Cities | |||||
|---|---|---|---|---|---|
| Mumbai | Delhi | Pune | Chennai | Hyderabad | Bengaluru |
| Ahmedabad | Rajkot | Coimbatore | Kolkata | Bhopal | Surat |
We exported to 50+ countries worldwide.
| Exported Countries | |||||
|---|---|---|---|---|---|
| USA | UK | UAE | Germany | South Africa | Australia |
| Italy | Canada | Netherlands | Qatar | Saudi Arabia | Malaysia |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards.
Quality Inspection & Testing
At Super Metal Manufacturing Co., all products are checked through strict quality inspection and testing to meet international standards such as ASTM, ASME, EN, and DIN. This ensures consistent quality, accurate dimensions, and full material traceability.
- β Chemical composition testing
- β Mechanical tests such as tensile and hardness
- β Dimensional inspection as per standard tolerances
- β PMI, ultrasonic, and visual inspection (if required)
- β EN 10204 3.1 / 3.2 test certificates
- β Third-party inspection by SGS, TUV, BV, or Lloydβs
Our quality systems support reliable supply for oil & gas, petrochemical, power, marine, and heavy engineering projects.
People Also Search For
- 4140 Steel Properties
- 4140 Round Bar Suppliers in South Africa
- 4140 Steel Applications
- Alloy Steel Round Bar in South Africa
- Heat Treatment of 4140 Steel
Frequently Asked Questions
About Super Metal Manufacturing Co.
Super Metal Manufacturing Co. is a trusted name in the metal industry since 1965, specializing in the manufacturing and export of high-quality 4140, EN19, and 42CrMo4 round bars. With decades of experience, we have built a strong reputation for delivering precision-engineered, durable, and high-performance steel products to industries worldwide.
Our company is committed to excellence through a robust quality management system and strict quality control at every stage of production. From sourcing premium raw materials from reputed suppliers like SAIL and JSW to final delivery, every product undergoes rigorous testing including tensile testing, bend and rebend tests, chemical analysis, and ultrasonic testing to ensure superior performance and reliability.
We are accredited with ISO 9001 certification and are TUV certified, reflecting our commitment to international quality standards. Our state-of-the-art manufacturing facilities, advanced machinery, and skilled workforce enable us to deliver customized solutions tailored to client requirements.
- β 50+ years of industry experience in alloy steel and round bar manufacturing
- β Specialized in 4140, EN19, and 42CrMo4 high-performance round bars
- β ISO certified and TUV approved quality standards
- β Strict quality testing including ultrasonic and chemical analysis
- β Premium raw material sourcing from SAIL and JSW
- β Advanced manufacturing infrastructure with modern machinery
- β Custom-engineered solutions as per drawings and specifications
- β Global export capability with reliable delivery
- β Trusted by industries for critical and high-performance applications
Our Mission
Our mission is to deliver the highest-quality alloy steel round bars while maintaining excellence in precision, innovation, and customer satisfaction. We aim to empower industries worldwide by providing reliable and durable products that meet evolving manufacturing needs.
Our Vision
Our vision is to become a global leader in the manufacturing and export of premium-quality round bars, recognized for our product excellence, innovation, and commitment to exceeding customer expectations.