AISI 4140 Round Bar Round Bar in South Africa
AISI 4140 Round Bar Round Bar in South Africa offers a versatile solution for industries requiring high-strength alloy steel components. This material, known for its excellent toughness, fatigue resistance, and hardenability, is widely used in manufacturing and engineering sectors. The round bar product type is favored for its uniform cross-section, making it ideal for machining, forging, and construction applications. South Africa's strategic location and developed industrial base make it a key supplier for both domestic and international markets.
The alloy composition of AISI 4140 includes chromium, molybdenum, and manganese, which contribute to its outstanding mechanical properties. Typically supplied in various diameters and lengths, these round bars meet stringent standards such as ASTM and SAE specifications. Heat treatment processes like quenching and tempering enhance the steelβs strength and wear resistance, ensuring reliability under demanding conditions. This makes the material suitable for parts like gears, shafts, bolts, and heavy-duty machinery components.
In terms of applications, these alloy steel bars are extensively used in automotive, aerospace, mining, and construction industries. Their ability to withstand high stress and strain without deforming allows manufacturers to produce durable and high-performance parts. Additionally, the materialβs machinability ensures precision engineering and tight tolerances, which are critical for industrial buyers focusing on quality and long service life.
South African suppliers of these alloy steel bars are well-equipped to handle large volume orders and offer customization to meet specific client requirements. The export readiness of these products is supported by adherence to international quality certifications and efficient logistics networks. This ensures timely delivery and compliance with global standards, making them a reliable choice for buyers worldwide.
Choosing AISI 4140 alloy steel round bars from South Africa provides industrial buyers with a combination of superior material properties, competitive pricing, and dependable supply chain management. Whether for local manufacturing or international export, these round bars serve as a foundational element in producing robust and high-performance industrial components.
Our Approvals | Third Party Inspection
Lead Time
2β7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why AISI 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 AISI 4140 Round Bar Round Bar in South Africa
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 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 AISI 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 AISI 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 AISI 4140 Round Bar
- β High tensile strength for demanding applications
- β Excellent toughness and wear resistance
- β Good machinability and weldability characteristics
- β Available in various diameters and lengths
- β Suitable for heat treatment processes
- β Compliant with industry standards and specifications
Technical Overview of AISI 4140 Round Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4140 Round Bar | C: 0.38-0.43%, Cr: 0.90-1.20%, Mo: 0.15-0.25% | Used in high-strength applications such as gears, axles, and shafts. | ASTM A829, SAE J403 |
| AISI 4140 Round Bar | C: 0.38-0.43%, Cr: 0.90-1.20%, Mo: 0.15-0.25% | Ideal for heat-treated applications requiring high toughness and wear resistance. | AMS 6345, ASTM A216 |
| AISI 4140 Round Bar | C: 0.38-0.43%, Cr: 0.90-1.20%, Mo: 0.15-0.25% | Commonly used in the manufacturing of automotive components and machinery parts. | ASME SA-829, ISO 683-17 |
Specifications Table
| Material | AISI 4140 |
|---|---|
| Grades | 4140, 4140H |
| Standard | ASTM A829, SAE J403 |
| Size Range | 10 mm to 300 mm Diameter |
| Length | Up to 6 meters |
| Form | Round Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4140 Round Bar | C: 0.38-0.43, Mn: 0.75-1.00, Cr: 0.80-1.10, Mo: 0.15-0.25 | Automotive components, gears, axles |
| AISI 4140 HT Round Bar | C: 0.38-0.43, Mn: 0.75-1.00, Cr: 0.80-1.10, Mo: 0.15-0.25 | High-stress applications, oil and gas tools |
| AISI 4140 QT Round Bar | C: 0.38-0.43, Mn: 0.75-1.00, Cr: 0.80-1.10, Mo: 0.15-0.25 | Heavy machinery, structural applications |
| AISI 4140 Normalized Round Bar | C: 0.38-0.43, Mn: 0.75-1.00, Cr: 0.80-1.10, Mo: 0.15-0.25 | Heavy duty automotive parts, tooling |
| AISI 4140 Cold Drawn Round Bar | C: 0.38-0.43, Mn: 0.75-1.00, Cr: 0.80-1.10, Mo: 0.15-0.25 | Precision machined components, fixtures |
Available Sizes of AISI 4140 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 20 |
| 25 | 30 |
| 35 | 40 |
| 45 | 50 |
| 55 | 60 |
| 70 | 80 |
| 90 | 100 |
| 110 | 120 |
| 130 | 140 |
| 150 | 160 |
Chemical Properties of AISI 4140 Round Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Iron (Fe) | Balance |
Mechanical Properties of AISI 4140 Round Bar
| Property | Value |
|---|---|
| Tensile Strength | 655 MPa |
| Yield Strength | 415 MPa |
| Elongation | 20% |
| Hardness (Brinell) | 207 HB |
| Impact Toughness | 35 J |
AISI 4140 Round Bar β Physical & Thermal Properties
Density of AISI 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,850 kg/mΒ³ | 490 lb/ftΒ³ |
Melting Point of AISI 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,540 Β°C | 2,804 Β°F |
Specific Heat of AISI 4140 Round Bar
| Specific Heat of AISI 4140 Round Bar | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 20 - 100 | Annealed |
| 460 | 100 - 300 | Tempered |
| 420 | 300 - 600 | Quenched |
Electrical Resistivity of AISI 4140 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 70 | 20 | As quenched |
| 75 | 100 | |
| 80 | 200 | |
| 85 | 300 | |
| 90 | 400 | |
Equivalent of AISI 4140 Round Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| SANS 1431 | 42CrMo4 | G41400 |
| ASTM A829 | 4140 | G41400 |
Manufacturing Process & Heat Treatment of AISI 4140 Round Bar
Annealing
The annealing process for AISI 4140 round bars involves heating the material to a temperature of approximately 850-900Β°C, followed by a slow cooling process. This treatment helps to relieve internal stresses, improve ductility, and refine the grain structure, making the steel easier to work with in subsequent manufacturing stages.
Forging
Forging of AISI 4140 round bars typically occurs at temperatures between 1100-1250Β°C. This process enhances the mechanical properties of the steel by aligning the grain structure and increasing strength. The forged bars are then allowed to cool naturally or be subjected to further heat treatment processes.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-880 | Oil or Water | To increase hardness and strength through martensitic transformation. |
| Tempering | 400-600 | Air | To reduce brittleness and improve toughness after hardening. |
| Stress Relieving | 600-650 | Air | To relieve residual stresses from machining or welding operations. |
The combination of these processes ensures that AISI 4140 round bars achieve optimal mechanical properties suitable for various industrial applications, including automotive and structural components.
Various Types
AISI 4140 Round Bar - Standard
- Diameter: 20mm to 300mm
- Condition: Hot Rolled, Annealed
- Applications: Automotive components, Machinery parts
AISI 4140 Round Bar - Quenched and Tempered
- Diameter: 25mm to 200mm
- Condition: Quenched and Tempered
- Applications: High-stress applications, Gear manufacturing
AISI 4140 Round Bar - Cold Drawn
- Diameter: 10mm to 150mm
- Condition: Cold Drawn
- Applications: Precision machining, Tooling
AISI 4140 Round Bar - Alloy Steel
- Diameter: 15mm to 250mm
- Condition: Normalized
- Applications: Construction, Oil & Gas industry
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 AISI 4140 Round Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| AISI 4140 Round Bar | 3 mm | $3.20 β $3.50 | βΉ265 β βΉ290 |
| AISI 4140 Round Bar | 6 mm | $3.10 β $3.40 | βΉ260 β βΉ285 |
| AISI 4140 Round Bar | 10 mm | $3.00 β $3.30 | βΉ255 β βΉ280 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for AISI 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
- AISI 4140 Steel Properties
- AISI 4140 Round Bar Suppliers in South Africa
- AISI 4140 Heat Treatment Process
- AISI 4140 Round Bar Price per Kg
- AISI 4140 Round Bar Applications
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.