AISI 4340 Round Bar exporter in Thailand
AISI 4340 Round Bar exporter in Thailand offers high-quality alloy steel bars known for their excellent strength, toughness, and fatigue resistance. These bars are widely used in demanding industrial applications where superior mechanical properties are essential. Manufactured to meet rigorous international standards, the product ensures reliable performance in critical engineering projects.
The alloy composition of this steel grade includes nickel, chromium, and molybdenum, which contribute to its outstanding hardenability and tensile strength. Typically supplied in round bar form, these materials come in various diameters and lengths to accommodate diverse machining and fabrication requirements. Heat treatment processes further enhance the mechanical properties, making them suitable for heavy-duty usage.
Engineers and manufacturers utilize these alloy steel bars extensively in sectors such as aerospace, automotive, oil and gas, and heavy machinery. Common applications include gears, shafts, bolts, and structural components subjected to high stress and impact. The metalβs ability to withstand dynamic loads and resist wear makes it a preferred choice for critical parts that demand durability and precision.
Thailand-based suppliers specializing in export ensure that the round bars are packaged and shipped according to international logistics and quality assurance protocols. This guarantees timely delivery and compliance with global trade regulations. Industrial buyers can expect comprehensive documentation, including mill test certificates and material traceability, to support quality control and certification needs.
With a focus on export readiness, these alloy steel bars are sourced from trusted mills and undergo stringent inspection before dispatch. This commitment to quality and service makes the offering ideal for global clients seeking dependable material solutions for advanced manufacturing and engineering projects.
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 Round Bar exporter in Thailand 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 Round Bar exporter in Thailand
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Round Bar exporter in Thailand
- 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 Thailand
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 Thailand
| 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 Round Bar
- β High tensile strength for demanding applications
- β Excellent fatigue resistance, ideal for heavy load conditions
- β Superior toughness and ductility, enhancing performance in various environments
- β Good machinability and weldability for ease of fabrication
- β Suitable for heat treatment to achieve desired hardness
- β Widely used in aerospace, automotive, and industrial applications
Technical Overview of AISI 4340 Round Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4340 Round Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Nickel: 1.65-2.00%, Chromium: 0.70-0.90%, Molybdenum: 0.15-0.25% | Used in high-stress applications, including gears, shafts, and other heavy machinery components. | ASTM A322, ASTM A29, SAE J403 |
| AISI 4340 Round Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Nickel: 1.65-2.00%, Chromium: 0.70-0.90%, Molybdenum: 0.15-0.25% | Commonly used in the aerospace industry for its strength and toughness. | AMS 6414, AMS 6415 |
| AISI 4340 Round Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Nickel: 1.65-2.00%, Chromium: 0.70-0.90%, Molybdenum: 0.15-0.25% | Ideal for making high-strength structural components in the automotive sector. | SAE J404, ASTM A829 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A29/A29M |
| 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 | 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% | High strength applications, aerospace components, automotive parts, machinery parts |
| AISI 4340 HT Round Bar | 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% | High-temperature applications, tooling, and heavy machinery |
| AISI 4340 QT Round Bar | 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% | Quenched and tempered applications, high-stress components, gears, and shafts |
| AISI 4340 Normalized Round Bar | 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% | Normalized applications, structural components, heavy-duty machinery |
| AISI 4340 Annealed Round Bar | 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% | General-purpose applications, machining, and fabrication |
Available Sizes of AISI 4340 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 12 |
| 14 | 16 |
| 18 | 20 |
| 22 | 25 |
| 28 | 30 |
| 32 | 35 |
| 40 | 45 |
| 50 | 55 |
| 60 | 65 |
| 70 | 75 |
Chemical Properties of AISI 4340
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 - 0.40 |
| Nickel (Ni) | 1.65 - 2.00 |
| Chromium (Cr) | 0.70 - 0.90 |
| Molybdenum (Mo) | 0.20 - 0.30 |
Mechanical Properties of AISI 4340
| Property | Value |
|---|---|
| Tensile Strength | 745 MPa (108,000 psi) |
| Yield Strength | 655 MPa (95,000 psi) |
| Elongation | 15% |
| Reduction of Area | 55% |
| Hardness | HRC 28-34 |
AISI 4340 Round Bar β Physical & Thermal Properties
Density of AISI 4340 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cmΒ³ | 0.284 lb/inΒ³ |
Melting Point of AISI 4340 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1540 Β°C | 2600 - 2800 Β°F |
Specific Heat of AISI 4340 Round Bar
| Specific Heat of AISI 4340 Round Bar | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 200 | Elevated Temperature |
| 700 | 200 - 400 | High Temperature |
Electrical Resistivity of AISI 4340 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 75 | 20 | Annealed |
| 80 | 100 | |
| 85 | 200 | |
| 90 | 300 | |
| 95 | 400 | |
Equivalent of AISI 4340 Round Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| EN 10083-3 | 34CrNiMo6 | G43400 |
| SAE J404 | 4340 | G43400 |
Manufacturing Process & Heat Treatment of AISI 4340
Annealing
The annealing process for AISI 4340 steel involves heating the material to a temperature range of 800-850Β°C, followed by a slow cooling process. This procedure helps to relieve internal stresses, improve ductility, and enhance machinability, making the steel easier to work with in subsequent manufacturing processes.
Forging
Forging of AISI 4340 is typically performed at elevated temperatures ranging from 1100-1200Β°C. This process enhances the mechanical properties of the steel by refining the grain structure, resulting in improved 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 | To increase hardness and strength of the steel |
| Tempering | 400-600 | Air | To reduce brittleness and improve toughness |
| Stress Relieving | 600-650 | Air | To relieve internal stresses post-hardening |
The manufacturing and heat treatment processes of AISI 4340 round bars are critical in ensuring the material meets the required specifications for strength, toughness, and durability in various industrial applications.
Various Types
AISI 4340 Round Bar - Hot Rolled
- Diameter: 10 mm to 300 mm
- Condition: Hot Rolled
- Applications: Automobiles, Aerospace, Heavy Machinery
AISI 4340 Round Bar - Cold Drawn
- Diameter: 6 mm to 150 mm
- Condition: Cold Drawn
- Applications: Manufacturing, Tooling, Oil & Gas
AISI 4340 Round Bar - Annealed
- Diameter: 20 mm to 250 mm
- Condition: Annealed
- Applications: Structural Components, Aerospace Parts
AISI 4340 Round Bar - Quenched and Tempered
- Diameter: 15 mm to 200 mm
- Condition: Quenched and Tempered
- Applications: High-stress Applications, Heavy Equipment
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 β $5.00 | βΉ370 β βΉ410 |
| AISI 4340 | 6 mm | $4.80 β $5.30 | βΉ395 β βΉ435 |
| AISI 4340 | 10 mm | $5.00 β $5.60 | βΉ410 β βΉ460 |
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: 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 4340 Steel Properties
- AISI 4340 Round Bar Suppliers in Thailand
- AISI 4340 Round Bar Price in Thailand
- AISI 4340 Round Bar Manufacturers
- AISI 4340 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.