AISI 4140 Round Bar exporter in Thailand
AISI 4140 Round Bar exporter in Thailand offers high-quality alloy steel bars known for their excellent strength, toughness, and wear resistance. These bars are widely used in various industrial sectors due to their versatile mechanical properties and ability to withstand high stress and fatigue. Manufactured under strict quality controls, the product meets international standards, making it a reliable choice for demanding engineering applications.
The material composition of AISI 4140 includes chromium, molybdenum, and manganese, which enhance its hardenability and corrosion resistance. Available in multiple diameters and lengths, these round bars provide consistent dimensional accuracy and superior surface finish. They can be supplied in different heat treatment conditions, such as annealed, normalized, or quenched and tempered, to suit specific project requirements.
These alloy steel bars are extensively used in construction machinery, automotive components, oil and gas equipment, and heavy-duty shafts. Their combination of strength and ductility ensures durability under dynamic loading and harsh environments. Industrial buyers benefit from the bars' excellent machinability, which facilitates efficient fabrication and reduces production time.
Exporters in Thailand maintain robust logistics and quality assurance processes to ensure timely delivery and compliance with international shipping standards. With certifications like ISO and material test reports available on request, overseas clients can trust the consistent quality and traceability of the supplied round bars. This makes them an ideal partner for global manufacturers seeking dependable alloy steel solutions.
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 4140 Round Bar exporter in Thailand 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 4140 Round Bar exporter in Thailand
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4140 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 4140 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 4140 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 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 4140 Round Bar
- ✔ High tensile strength and toughness
- ✔ Excellent hardenability and wear resistance
- ✔ Suitable for a wide range of applications including automotive and machinery components
- ✔ Available in various diameters and lengths
- ✔ Consistent chemical composition meets industry standards
- ✔ Exceptional machinability and weldability
Technical Overview of AISI 4140 Round Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.80-1.10% Cr, 0.15-0.25% Mo | Used in the manufacturing of gears, shafts, and other high-stress components. | ASTM A29, ASTM A322, SAE J403 |
| AISI 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.80-1.10% Cr, 0.15-0.25% Mo | Commonly employed in oil and gas, mining, and automotive industries. | API 6A, API 7-1, ASME SA-722 |
| AISI 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.80-1.10% Cr, 0.15-0.25% Mo | Ideal for heat-treated applications requiring high tensile strength. | ISO 683, EN 10083 |
Specifications Table
| Material | AISI 4140 |
|---|---|
| Grades | 4140, 4142 |
| Standard | ASTM A29, ASTM A322 |
| Size Range | 20 mm to 500 mm diameter |
| Length | Up to 6 meters |
| Form | Round Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4140 Round Bar | Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%) | Automotive components, Machinery parts, Tooling |
| AISI 4140 QT Round Bar | Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%) | High-stress applications, Oil & gas industry, Heavy equipment manufacturing |
| AISI 4140 Pre-Hardened Round Bar | Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%) | General engineering, Heavy-duty machinery, Manufacturing fixtures |
| AISI 4140 Chrome Moly Round Bar | Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%) | Aerospace applications, High-performance components, Structural parts |
| AISI 4140 Alloy Steel Round Bar | Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%) | Energy sector, Automotive, Construction |
Available Sizes of AISI 4140 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 | 25 |
| 12 | 30 |
| 16 | 35 |
| 20 | 40 |
| 22 | 45 |
| 28 | 50 |
| 32 | 55 |
| 38 | 60 |
| 45 | 70 |
| 50 | 80 |
Chemical Properties of AISI 4140
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.04 |
| 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
| Property | Value |
|---|---|
| Tensile Strength | 655 MPa (95 ksi) |
| Yield Strength | 415 MPa (60 ksi) |
| Elongation | 20% |
| Hardness (Rockwell C) | 28 - 32 HRC |
| Modulus of Elasticity | 210 GPa (30 x 106 psi) |
AISI 4140 Round Bar – Physical & Thermal Properties
Density of AISI 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7850 kg/m³ | 490 lb/ft³ |
Melting Point of AISI 4140 Round Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1420 - 1540 °C | 2600 - 2800 °F |
Specific Heat of AISI 4140 Round Bar
| Specific Heat of AISI 4140 Round Bar | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 420 | 20 - 100 | Annealed |
| 460 | 100 - 400 | Tempered |
| 500 | 400 - 600 | Hardened |
Electrical Resistivity of AISI 4140 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 70 | 20 | Quenched and Tempered |
| 72 | 100 | |
| 74 | 200 | |
| 76 | 300 | |
| 78 | 400 | |
Equivalent of AISI 4140
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A29 | 1.7225 | G41400 |
| EN 10083-3 | 42CrMo4 | 1.7225 |
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°C to 900°C, followed by a slow cooling process. This treatment helps to relieve internal stresses and improve the ductility and machinability of the steel, making it more workable for subsequent manufacturing processes.
Forging
Forging of AISI 4140 round bars is typically conducted at temperatures ranging from 1100°C to 1250°C. This process involves shaping the steel by applying compressive forces, which enhances its mechanical properties, such as strength and toughness. The hot working process also refines the grain structure, resulting in improved performance characteristics.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 830 - 860 | Oil | To increase hardness and strength |
| Tempering | 400 - 700 | Air | To reduce brittleness and achieve desired toughness |
| Stress Relieving | 600 - 650 | Air | To alleviate residual stresses after machining |
The combination of these heat treatment processes ensures that AISI 4140 round bars achieve optimal mechanical properties, making them suitable for various industrial applications, particularly in demanding environments.
Various Types
AISI 4140 Round Bar - Hot Rolled
- Diameter: 10 mm to 300 mm
- Condition: Hot Rolled
- Applications: Automotive components, Machinery parts
AISI 4140 Round Bar - Cold Drawn
- Diameter: 5 mm to 100 mm
- Condition: Cold Drawn
- Applications: High-strength applications, Tool manufacturing
AISI 4140 Round Bar - Annealed
- Diameter: 12 mm to 250 mm
- Condition: Annealed
- Applications: Machining, Fabrication
AISI 4140 Round Bar - Quenched and Tempered
- Diameter: 20 mm to 150 mm
- Condition: Quenched and Tempered
- Applications: Heavy-duty machinery, Structural components
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 | $3.50 – $4.00 | ₹290 – ₹330 |
| AISI 4140 Round Bar | 6 mm | $3.20 – $3.80 | ₹260 – ₹310 |
| AISI 4140 Round Bar | 10 mm | $3.00 – $3.50 | ₹240 – ₹290 |
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: 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 4140 Steel Supplier in Thailand
- 4140 Round Bar Price in Thailand
- 4140 Steel Round Bar Manufacturer
- AISI 4140 Round Bar Specifications
- 4140 Alloy Steel Exporter in Thailand
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.