AISI 4140 Round Bar exporter
AISI 4140 Round Bar exporter plays a crucial role in supplying high-strength alloy steel bars that meet stringent industrial standards. Known for its exceptional toughness, fatigue resistance, and excellent machinability, this chromium-molybdenum alloy steel is widely used across various heavy-duty applications. The round bars are precision-manufactured to ensure uniformity in diameter and surface finish, making them ideal for critical mechanical components.
The material properties of these alloy steel bars include a balanced combination of hardness and ductility, achieved through controlled heat treatment processes. Typically, the round bars conform to ASTM A29 or equivalent standards, ensuring consistent chemical composition and mechanical performance. With tensile strengths ranging from 95,000 to 110,000 psi and good impact resistance, they are suitable for manufacturing gears, shafts, bolts, and other high-stress parts.
Industries such as automotive, aerospace, oil and gas, and heavy machinery rely heavily on these alloy steel bars for their structural integrity and durability under demanding conditions. Their resistance to wear and fatigue makes them a preferred choice for components exposed to cyclic loading and harsh environments. Additionally, the alloyβs compatibility with various surface treatments and coatings enhances its corrosion resistance and lifespan.
Export readiness is a key consideration, with suppliers ensuring compliance with international quality certifications and offering customization options to meet diverse client requirements. Packaging is optimized for safe transit, and logistics partners are experienced in handling industrial shipments to global destinations. This ensures timely delivery and seamless integration into global supply chains.
For industrial buyers seeking reliable alloy steel solutions, sourcing from a well-established exporter guarantees access to premium grade round bars with traceable quality documentation. Technical support and post-shipment services further enhance the procurement experience, making these steel bars a dependable choice for critical manufacturing needs worldwide.
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 exporter 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 exporter
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4140 Round Bar exporter
- 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
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
| 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 fatigue and impact resistance
- β Good machinability and weldability
- β Available in various sizes and specifications
- β Heat treatable for enhanced performance
- β Corrosion-resistant options available
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, 0.15-0.30% Mo | Used in oil and gas, automotive, and machinery applications for its strength and toughness | ASTM A829, AMS 6349 |
| AISI 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.80-1.10% Cr, 0.15-0.30% Mo | Ideal for manufacturing gears, axles, and shafts requiring high fatigue strength | SAE J403, ASTM A331 |
| AISI 4140 Round Bar | 0.38-0.43% C, 0.75-1.00% Mn, 0.15-0.25% Si, 0.80-1.10% Cr, 0.15-0.30% Mo | Commonly used in construction and structural applications | ISO 683-17, ASTM A108 |
Specifications Table
| Material | AISI 4140 |
|---|---|
| Grades | 4140, 4142, 4145 |
| Standard | ASTM A829, SAE J403 |
| Size Range | 0.5 inches to 12 inches diameter |
| Length | Up to 20 feet |
| 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% | Used in the manufacture of gears, axles, and crankshafts. |
| AISI 4140 HT Round Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25%, Heat Treated | Ideal for high-stress applications, including heavy machinery components. |
| 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%, Quenched and Tempered | Commonly used in the oil and gas industry for downhole tools. |
| AISI 4140 Prehard Round Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25%, Pre-hardened to 28-32 HRC | Suitable for applications requiring machining without additional heat treatment. |
| 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% | Used in automotive and aerospace applications for structural components. |
Available Sizes of AISI 4140 Round Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 | 30 |
| 25 | 35 |
| 28 | 40 |
| 32 | 45 |
| 38 | 50 |
| 42 | 55 |
| 48 | 60 |
| 55 | 70 |
| 60 | 75 |
| 70 | 80 |
Chemical Properties of AISI 4140
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Chromium (Cr) | 0.90 - 1.20 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | Max 0.035 |
| Sulfur (S) | Max 0.040 |
| Iron (Fe) | Balance |
Mechanical Properties of AISI 4140
| Property | Value |
|---|---|
| Yield Strength (MPa) | 655 |
| Tensile Strength (MPa) | 758 |
| Elongation (%) | 21 |
| Hardness (HB) | 207 |
| Modulus of Elasticity (GPa) | 210 |
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 |
| 460 | 20 - 100 | Annealed |
| 420 | 100 - 300 | Tempered |
| 390 | 300 - 500 | Quenched |
Electrical Resistivity of AISI 4140 Round Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 75 | 20 | Quenched and Tempered |
| 80 | 100 | |
| 85 | 200 | |
| 90 | 300 | |
| 95 | 400 | |
Equivalent of AISI 4140
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A29 | 42CrMo4 | G41400 |
| DIN 1.7225 | 42CrMo4 | G41400 |
Manufacturing Process & Heat Treatment of AISI 4140
Annealing
Annealing of AISI 4140 is typically performed to relieve internal stresses and to soften the material, enhancing its machinability. The process involves heating the steel to a temperature range of approximately 800-900Β°C, followed by slow cooling in a furnace or air. This treatment results in a refined microstructure, ensuring uniform properties throughout the round bar.
Forging
Forging of AISI 4140 round bars is conducted at temperatures between 950-1200Β°C. This process improves the mechanical properties of the steel by refining the grain structure and enhancing strength and toughness. The hot working process shapes the material while minimizing defects, making it suitable for various industrial applications.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-870 | Oil or Water | Increase hardness and strength |
| Tempering | 400-600 | Air | Reduce brittleness and improve toughness |
| Stress Relieving | 600-650 | Air | Minimize residual stresses from hardening |
The combination of these processes ensures that AISI 4140 round bars possess high strength, toughness, and wear resistance, making them ideal for demanding applications in various industries.
Various Types
AISI 4140 Round Bar - Hot Rolled
- Diameter: 20mm to 300mm
- Condition: Hot Rolled
- Applications: Machinery parts, shafts, and axles
AISI 4140 Round Bar - Cold Drawn
- Diameter: 10mm to 100mm
- Condition: Cold Drawn
- Applications: Precision machining, automotive components
AISI 4140 Round Bar - Annealed
- Diameter: 25mm to 150mm
- Condition: Annealed
- Applications: Tooling, fixtures, and dies
AISI 4140 Round Bar - Quenched and Tempered
- Diameter: 30mm to 200mm
- Condition: Quenched and Tempered
- Applications: Heavy 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 | 3 mm | $2.50 β $2.80 | βΉ207 β βΉ232 |
| AISI 4140 | 6 mm | $2.40 β $2.70 | βΉ200 β βΉ225 |
| AISI 4140 | 10 mm | $2.30 β $2.60 | βΉ195 β βΉ220 |
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
- AISI 4140 Heat Treatment
- AISI 4140 Round Bar Price
- 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.