AISI 4340 Round Bar exporter in Brazil
AISI 4340 Round Bar exporter in Brazil plays a crucial role in supplying high-strength alloy steel components to various heavy industries. Known for its excellent toughness, fatigue strength, and wear resistance, this nickel-chromium-molybdenum steel grade is widely used in applications requiring superior mechanical properties. Brazilian exporters ensure that these bars meet stringent international standards, making them attractive to global markets seeking reliable raw materials.
The AISI 4340 round bars offered typically feature a balanced composition that includes nickel, chromium, and molybdenum, which contribute to enhanced hardenability and tensile strength. These bars are available in various diameters and lengths, catering to diverse industrial requirements. Heat treatment processes such as quenching and tempering are commonly applied to optimize their mechanical performance, ensuring durability and resistance to impact in demanding environments.
Industries such as aerospace, automotive, oil and gas, and heavy machinery heavily rely on these alloy steel bars for manufacturing critical components like gears, shafts, fasteners, and aircraft landing gear parts. Their ability to maintain strength at elevated temperatures and under cyclic loads makes them indispensable for parts subjected to high stress and fatigue.
Brazilian exporters emphasize export readiness by adhering to international quality certifications and providing comprehensive documentation, including material test reports and compliance with ASTM and SAE specifications. Efficient logistics and packaging solutions are implemented to preserve the integrity of the bars during transit, ensuring timely delivery to industrial buyers worldwide.
Choosing a supplier from Brazil guarantees access to premium AISI 4340 round bars with consistent chemical composition and mechanical properties. This reliability supports manufacturers in producing components that meet rigorous performance criteria, ultimately contributing to the success of their end products in competitive markets.
Our Approvals | Third Party Inspection
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why AISI 4340 Round Bar exporter in Brazil Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ 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 Round Bar exporter in Brazil
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Round Bar exporter in Brazil
- 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 Round Bar exporter in Brazil
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 Round Bar exporter in Brazil
| 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 15–20% 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 Round Bar
- ✔ High tensile strength for demanding applications
- ✔ Excellent hardenability and toughness
- ✔ Good fatigue resistance for structural components
- ✔ Suitable for heat treatment processes
- ✔ Versatile for various industrial applications
- ✔ Available in various diameters and lengths
Technical Overview of AISI 4340 Round Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4340 Round Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.80%, Mo: 0.20-0.30% | Used in high-strength applications such as aerospace, automotive, and machinery components. | AISI, ASTM, SAE |
| AISI 4340 Round Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.80%, Mo: 0.20-0.30% | Ideal for manufacturing gears, shafts, and heavy-duty machinery parts. | ASTM A29, ASTM A322 |
| AISI 4340 Round Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.80%, Mo: 0.20-0.30% | Commonly used in the oil and gas industry for drill collars and other downhole tools. | SAE J403, J404 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A829 |
| Size Range | 10 mm to 300 mm Diameter |
| Length | Up to 6 meters |
| Form | Round Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4340 Round Bar | C: 0.38-0.43, Mn: 0.60-0.90, P: max 0.035, S: max 0.040, Cr: 0.70-0.90, Mo: 0.15-0.25, Ni: 1.65-2.00 | Used in automotive components, gears, and heavy machinery. |
| AISI 4340H Round Bar | C: 0.43-0.48, Mn: 0.60-0.90, P: max 0.035, S: max 0.040, Cr: 0.70-0.90, Mo: 0.15-0.25, Ni: 1.80-2.10 | Used in high-stress applications, such as aircraft components and heavy-duty axles. |
| AISI 4340Q Round Bar | C: 0.36-0.44, Mn: 0.70-0.90, P: max 0.035, S: max 0.040, Cr: 0.70-0.90, Mo: 0.20-0.30, Ni: 1.50-1.75 | Suitable for oil and gas applications, as well as high-performance machinery. |
| AISI 4340V Round Bar | C: 0.40-0.48, Mn: 0.70-0.90, P: max 0.035, S: max 0.040, Cr: 0.70-0.90, Mo: 0.15-0.25, Ni: 1.80-2.10, V: 0.05-0.15 | Ideal for components requiring high tensile strength and toughness. |
| AISI 4340W Round Bar | C: 0.38-0.43, Mn: 0.60-0.90, P: max 0.035, S: max 0.040, Cr: 0.70-0.90, Mo: 0.15-0.25, Ni: 1.65-2.00, W: 0.05-0.15 | Used in manufacturing heavy equipment and structural applications. |
Available Sizes of AISI 4340 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 20 |
| 25 | 30 |
| 35 | 40 |
| 45 | 50 |
| 55 | 60 |
| 65 | 70 |
| 75 | 80 |
| 85 | 90 |
| 95 | 100 |
| 110 | 120 |
Chemical Properties of AISI 4340
| 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) | 0.20 - 0.30 |
| Phosphorus (P) | 0.04 Max |
| Sulfur (S) | 0.04 Max |
Mechanical Properties of AISI 4340
| Property | Value |
|---|---|
| Tensile Strength | 980 MPa (142 ksi) |
| Yield Strength | 850 MPa (123 ksi) |
| Elongation | 15% in 50mm |
| Hardness | 28-32 HRC |
| Modulus of Elasticity | 210 GPa (30.5 x 106 psi) |
AISI 4340 Round Bar – Physical & Thermal Properties
Density of AISI 4340 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
Melting Point of AISI 4340 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1540 °C | 2600 - 2800 °F |
Specific Heat of AISI 4340 Round Bar
| Specific Heat of AISI 4340 Round Bar | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Annealed |
| 470 | 100 - 200 | Tempered |
| 460 | 200 - 300 | Quenched |
Electrical Resistivity of AISI 4340 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 76.0 | 20 | Quenched and Tempered |
| 78.5 | 100 | |
| 80.0 | 200 | |
| 82.5 | 300 | |
| 84.0 | 400 | |
Equivalent of AISI 4340
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 10083-3 | 34CrNiMo6 | G43400 |
| DIN 17200 | 42CrMo4 | 1.7225 |
Manufacturing Process & Heat Treatment of AISI 4340
Annealing
The annealing process for AISI 4340 involves heating the steel to a temperature range of 850-900°C, followed by slow cooling to relieve internal stresses and improve machinability. This process enhances the material's ductility and reduces hardness, making it easier to work with in subsequent manufacturing steps.
Forging
Forging of AISI 4340 is typically performed at elevated temperatures, around 1000-1200°C. This process involves shaping the steel through compressive forces, which refines the grain structure and increases the strength and toughness of the material. The forged bars are then allowed to cool slowly to room temperature.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 820-860 | Oil | To increase hardness and strength by transforming austenite to martensite. |
| Tempering | 400-600 | Air | To reduce brittleness and improve toughness after hardening. |
| Quenching | 820-860 | Oil or Water | To rapidly cool the steel for achieving desired mechanical properties. |
The manufacturing and heat treatment processes for AISI 4340 round bars are critical in achieving the desired mechanical properties, ensuring that the material meets international standards for quality and performance in various applications.
Various Types
AISI 4340 Round Bar - Standard Grade
- Diameter: 10mm to 300mm
- Condition: Hot Rolled, Cold Drawn
- Applications: Automotive, Aerospace, Heavy Machinery
AISI 4340 Round Bar - High Strength
- Diameter: 20mm to 250mm
- Condition: Quenched and Tempered
- Applications: Structural Components, Gear Manufacturing
AISI 4340 Round Bar - Alloy Steel
- Diameter: 15mm to 200mm
- Condition: Annealed
- Applications: Oil and Gas Industry, Mining Equipment
AISI 4340 Round Bar - Custom Sizes
- Diameter: Custom diameters available
- Condition: As per customer requirements
- Applications: Specialized Equipment, Custom Fabrications
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 Round Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| AISI 4340 | 3 mm | $4.50 – $5.00 | ₹370 – ₹410 |
| AISI 4340 | 6 mm | $4.30 – $4.80 | ₹360 – ₹400 |
| AISI 4340 | 10 mm | $4.10 – $4.60 | ₹350 – ₹390 |
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 Round Bar.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 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.
- ✔ Chemical composition testing
- ✔ Mechanical tests such as tensile and hardness
- ✔ Dimensional inspection as per standard tolerances
- ✔ PMI, ultrasonic, and visual inspection (if required)
- ✔ EN 10204 3.1 / 3.2 test certificates
- ✔ Third-party inspection by SGS, TUV, BV, or Lloyd’s
Our quality systems support reliable supply for oil & gas, petrochemical, power, marine, and heavy engineering projects.
People Also Search For
- AISI 4340 Steel Properties
- AISI 4340 Round Bar Suppliers in Brazil
- AISI 4340 Round Bar Price in Brazil
- AISI 4340 Round Bar Manufacturers
- AISI 4340 Heat Treatment Process
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.
- ✔ 50+ years of industry experience in alloy steel and round bar manufacturing
- ✔ Specialized in 4140, EN19, and 42CrMo4 high-performance round bars
- ✔ ISO certified and TUV approved quality standards
- ✔ Strict quality testing including ultrasonic and chemical analysis
- ✔ Premium raw material sourcing from SAIL and JSW
- ✔ Advanced manufacturing infrastructure with modern machinery
- ✔ Custom-engineered solutions as per drawings and specifications
- ✔ Global export capability with reliable delivery
- ✔ 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.