AISI 4340 Forged Black Flat Bar Round Bar in South Africa
AISI 4340 Forged Black Flat Bar Round Bar in South Africa represents a premium choice for industrial components requiring exceptional strength and toughness. This alloy steel, known for its high tensile strength and fatigue resistance, is commonly supplied in both flat and round bar forms, forged to enhance its mechanical properties. The black finish typically refers to the protective oxide layer formed during the manufacturing process, providing corrosion resistance and a clean surface suitable for further machining or fabrication.
Manufactured to stringent quality standards, these bars exhibit excellent hardenability and can be heat treated to achieve varying degrees of hardness and strength. With a chemical composition that includes nickel, chromium, and molybdenum, AISI 4340 offers superior performance in demanding environments. The flat bars provide versatility for structural and support applications, while the round bars are ideal for shafts, fasteners, and aerospace components where dimensional accuracy and fatigue resistance are critical.
These forged bars are widely used across sectors such as automotive, aerospace, heavy machinery, and mining, where durability under high stress and impact conditions is essential. Their ability to withstand extreme loads makes them particularly suited for gear manufacturing, crankshafts, and other critical rotating components. The robust microstructure achieved through forging ensures consistent mechanical properties throughout the material, reducing the risk of failure in service.
South Africaβs strategic location and advanced metallurgical industry enable efficient export logistics, making these bars readily available for international markets. Suppliers in the region maintain comprehensive quality certifications and offer customized dimensions to meet specific project requirements. This export readiness ensures timely delivery and compliance with global standards, supporting manufacturers worldwide in sourcing reliable alloy steel products.
For industrial buyers seeking dependable, high-performance steel bars, the combination of AISI 4340βs alloy characteristics with the precision forging process and black oxide finish provides a cost-effective solution. Whether for prototyping or large-scale production, these bars deliver the mechanical integrity and machinability necessary to optimize manufacturing workflows and product longevity.
Our Approvals | Third Party Inspection
Lead Time
2β7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why AISI 4340 Forged Black Flat 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 4340 Forged Black Flat Bar Round Bar in South Africa
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Forged Black Flat 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 4340 Forged Black Flat 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 4340 Forged Black Flat 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 4340 Forged Black Flat Bar Round Bar
- β High tensile strength for enhanced durability
- β Excellent toughness and fatigue resistance
- β Good machinability for precision applications
- β Versatile for various industrial applications
- β Resistant to wear and tear in demanding environments
- β Readily available in multiple sizes and dimensions
Technical Overview of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4340 Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Silicon: 0.15-0.40%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.20-0.30% | Used in applications requiring high strength and toughness, such as gears, axles, and heavy machinery components. | ASTM A29/A29M, ASTM AISI 4340 |
| AISI 4340 Forged Round Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Silicon: 0.15-0.40%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.20-0.30% | Ideal for high-stress applications in the aerospace and automotive industries. | ASTM A29/A29M, ASTM AISI 4340 |
| AISI 4340 Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Silicon: 0.15-0.40%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.20-0.30% | Commonly used in manufacturing high-performance components requiring excellent mechanical properties. | ASTM A29/A29M, ASTM AISI 4340 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A829 |
| Size Range | Flat Bar: 20mm to 200mm; Round Bar: 10mm to 150mm |
| Length | 6m to 12m |
| Form | Forged Black |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Phosphorus (max 0.035%), Sulfur (max 0.040%), Chromium (0.70-0.90%), Nickel (1.65-2.00%), Molybdenum (0.15-0.25%) | Used in the manufacturing of gears, crankshafts, and aircraft components. |
| AISI 4340 Forged Round Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Phosphorus (max 0.035%), Sulfur (max 0.040%), Chromium (0.70-0.90%), Nickel (1.65-2.00%), Molybdenum (0.15-0.25%) | Ideal for high-strength fasteners, axles, and heavy machinery components. |
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Phosphorus (max 0.035%), Sulfur (max 0.040%), Chromium (0.70-0.90%), Nickel (1.65-2.00%), Molybdenum (0.15-0.25%) | Commonly used in oil and gas applications due to its toughness. |
| AISI 4340 Forged Round Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Phosphorus (max 0.035%), Sulfur (max 0.040%), Chromium (0.70-0.90%), Nickel (1.65-2.00%), Molybdenum (0.15-0.25%) | Used in the construction of high-performance vehicles and aerospace structures. |
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Phosphorus (max 0.035%), Sulfur (max 0.040%), Chromium (0.70-0.90%), Nickel (1.65-2.00%), Molybdenum (0.15-0.25%) | Applicable in the production of heavy machinery and structural components. |
Available Sizes of AISI 4340 Forged Black Flat Bar Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 20 |
| 30 | 40 |
| 50 | 60 |
| 70 | 80 |
| 90 | 100 |
| 110 | 120 |
| 130 | 140 |
| 150 | 160 |
| 170 | 180 |
| 190 | 200 |
Chemical Properties of AISI 4340 Forged Black Flat Bar Round Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.60 - 0.90 |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.70 - 0.90 |
| Nickel (Ni) | 1.65 - 2.00 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.05 max |
Mechanical Properties of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 1080-1300 |
| Yield Strength (MPa) | 930-1100 |
| Elongation (%) | 12-15 |
| Hardness (HB) | 250-350 |
| Modulus of Elasticity (GPa) | 210 |
AISI 4340 Forged Black Flat Bar Round Bar in South Africa β Physical & Thermal Properties
Density of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Property | Metric | Imperial |
|---|---|---|
| Density | 7,850 kg/mΒ³ | 490 lb/ftΒ³ |
Melting Point of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1,400 - 1,500 Β°C | 2,552 - 2,732 Β°F |
Specific Heat of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Specific Heat of AISI 4340 Forged Black Flat Bar Round Bar in South Africa | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 25 - 100 | Annealed |
| 450 | 100 - 300 | Tempered |
| 400 | 300 - 500 | Hardened |
Electrical Resistivity of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 75 | 20 | As Forged |
| 80 | 100 | |
| 85 | 200 | |
| 90 | 300 | |
| 95 | 400 | |
Equivalent of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 10083-3 | 34CrNiMo6 | G43400 |
| SAE J403 | 4340 | G43400 |
Manufacturing Process & Heat Treatment of AISI 4340 Forged Black Flat Bar Round Bar in South Africa
Annealing
Annealing of AISI 4340 is conducted to relieve internal stresses and improve machinability. This process involves heating the steel to a temperature range of 850-900Β°C, followed by a slow cooling in the furnace to achieve a uniform microstructure and enhance ductility.
Forging
The forging of AISI 4340 involves shaping the steel through compressive forces, typically at temperatures around 1150-1250Β°C. This process enhances the mechanical properties of the material, such as strength and toughness, by refining the grain structure and eliminating porosity.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-900 | Oil | Increase hardness and strength |
| Tempering | 400-600 | Air | Reduce brittleness and relieve stresses |
| Stress Relieving | 600-700 | Air | Minimize residual stresses after forging |
The manufacturing and heat treatment processes of AISI 4340 ensure that the material meets the rigorous demands of industrial applications, providing enhanced performance and durability for various applications.
Various Types
AISI 4340 Forged Black Flat Bar
- Width: 50mm, Thickness: 20mm, Length: 6m
- Condition: Heat Treated
- Applications: Structural Components, Machinery Parts
AISI 4340 Forged Black Round Bar
- Diameter: 25mm, Length: 3m
- Condition: Annealed
- Applications: Shafts, Fasteners
AISI 4340 Forged Black Flat Bar
- Width: 100mm, Thickness: 10mm, Length: 4m
- Condition: Cold Drawn
- Applications: Tooling, Fixtures
AISI 4340 Forged Black Round Bar
- Diameter: 50mm, Length: 6m
- Condition: Quenched and Tempered
- Applications: Heavy Machinery, Automotive Parts
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 4340 Forged Black Flat Bar Round Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| AISI 4340 Forged Black Flat Bar Round Bar | 3 mm | $4.50 β $5.00 | βΉ370 β βΉ410 |
| AISI 4340 Forged Black Flat Bar Round Bar | 6 mm | $4.80 β $5.30 | βΉ400 β βΉ440 |
| AISI 4340 Forged Black Flat Bar Round Bar | 10 mm | $5.10 β $5.60 | βΉ430 β βΉ470 |
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 4340 Forged Black Flat Bar 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
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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.