4140 Round Bars Manufacturer in India
Super Metal Manufacturing Co. Since 1965 is an experienced supplier and manufacturer of alloy steel products in Mumbai, India. We provide 4140 Round Bars for industrial customers, OEMs, engineering companies, fabricators, machinery manufacturers, distributors and international buyers.
As a 4140 Round Bars Manufacturer in India, we understand that different industries require different material conditions, diameters, lengths and surface finishes. Therefore, 4140 Round Bars can be supplied according to the required specification, application and order quantity.
Our 4140 Round Bars are suitable for components subjected to mechanical loads, impact, torsional stresses and repeated service. The chromium and molybdenum alloying elements contribute to hardenability and allow the material to be heat treated for different combinations of hardness, strength and toughness.
What are 4140 Round Bars?
4140 Round Bars are solid circular bars produced from chromium-molybdenum alloy steel. The material is commonly identified by the designations AISI 4140 and SAE 4140. It is a medium-carbon alloy steel widely used in mechanical and engineering applications where strength and toughness are important.
The circular shape makes 4140 Round Bars suitable for turning, milling, drilling, grinding, threading and other machining operations. They are commonly used for shafts, gears, axles, pins, spindles, rollers, studs, crankshafts and other high-strength components.
4140 is also commonly compared with EN19 and 42CrMo4 / 1.7225. These grades may be used for similar engineering applications, but exact equivalence should always be verified against the applicable standard, chemical composition and mechanical properties.
4140 Round Bars Manufacturing Process
The manufacturing process of 4140 Round Bars depends on the required diameter, length, surface finish, production route and material condition. A typical manufacturing route includes raw material selection, controlled heating, hot rolling or forging, heat treatment, straightening, cutting, surface finishing and inspection.
Raw Material Selection
Suitable chromium-molybdenum alloy steel is selected according to the required 4140 grade and applicable material specification. Material identification and heat traceability can be maintained according to customer requirements.
Heating
The selected steel is heated under controlled conditions before rolling or forging. Controlled heating helps achieve uniform deformation and suitable metallurgical characteristics.
Hot Rolling
For rolled 4140 Round Bars, heated alloy steel is passed through rolling equipment to reduce the cross-section and achieve the required diameter. Controlled rolling helps produce consistent dimensions and material properties.
Forging
Forged 4140 Round Bars are produced by controlled deformation of heated steel. Forged material can be selected for applications requiring forged stock and suitable mechanical characteristics.
Heat Treatment
4140 Round Bars may undergo annealing, normalizing, hardening, quenching and tempering according to the required material condition. Heat treatment is used to achieve the required combination of hardness, strength and toughness.
Cutting and Straightening
After manufacturing and heat treatment, the bars can be straightened and cut to standard or customer-specified lengths.
Surface Finishing
Depending on the application, 4140 Round Bars can be supplied in black, bright, turned, peeled, ground or machined conditions. Ground and machined surfaces can be used where closer dimensional accuracy is required.
Inspection
Inspection can include chemical analysis, dimensional inspection, surface inspection and mechanical testing according to the applicable specification and customer requirements.
4140 Round Bars Material Specification
| Grade | AISI 4140 / SAE 4140 |
|---|---|
| Material Type | Chromium Molybdenum Alloy Steel |
| Material Number | 1.7225 / 42CrMo4 |
| UNS | G41400 |
| Standards | ASTM, ASME, AISI, SAE, EN, DIN, JIS, BS |
| Diameter | 5 mm to 500 mm |
| Length | 1000 mm to 6000 mm |
| Finish | Black, Bright, Turned, Peeled, Ground, Forged |
| Form | Round Bar, Forged Bar, Bright Bar |
| Supply Condition | Annealed, Normalized, Hardened & Tempered, Quenched & Tempered |
AISI 4140 / SAE 4140 / EN19 / 42CrMo4 Round Bars Grade
| Country names | USA | German | British | Japan | China | Australia | |
|---|---|---|---|---|---|---|---|
| Country standards | UNS | AISI / ASTM | DIN | BS | JIS | GB/T | AS |
| Grades | G41400 | 4140 | 1.7225 / 42CrMo4 | EN19 / 817M40 | SCM440 | 42CrMo | 4140 |
4140 Round Bars Chemical Composition
4140 is a chromium-molybdenum alloy steel. Carbon contributes to strength and hardness, while chromium and molybdenum improve hardenability and support the material's performance after suitable heat treatment. Typical composition ranges are shown below; the actual chemical composition should be confirmed against the applicable specification and Mill Test Certificate.
| Element | Typical Composition |
|---|---|
| Carbon (C) | 0.38 – 0.43% |
| Manganese (Mn) | 0.75 – 1.00% |
| Silicon (Si) | 0.15 – 0.35% |
| Chromium (Cr) | 0.80 – 1.10% |
| Molybdenum (Mo) | 0.15 – 0.25% |
| Phosphorus (P) | As per applicable specification |
| Sulfur (S) | As per applicable specification |
Advantages of 4140 Round Bars
- High Strength: 4140 is suitable for high-load mechanical and engineering components.
- Good Toughness: Suitable heat treatment provides a useful balance between strength and toughness.
- Excellent Hardenability: Chromium and molybdenum improve hardenability through the section.
- Good Wear Resistance: Heat-treated 4140 can provide useful resistance to mechanical wear.
- Heat Treatment Capability: The grade can be supplied in different heat-treated conditions.
- Good Machinability: Annealed and suitably processed 4140 can be machined effectively.
- High Fatigue Strength: The material is widely selected for components subjected to repeated mechanical loading.
- Versatile Engineering Grade: 4140 is used across automotive, machinery, construction, mining, agriculture and general engineering applications.
4140 Round Bars Applications
4140 Round Bars are used for manufacturing components where strength, toughness, hardenability and resistance to mechanical loading are required.
Automotive Industry
Applications include axles, shafts, gears, crankshafts, spindles, pins and other high-strength automotive components.
Heavy Machinery
4140 Round Bars can be machined into drive shafts, gears, rollers, axles, pins, spindles and other machinery components.
Construction Equipment
The grade is suitable for selected pins, shafts, axles, brackets and mechanical components used in construction machinery.
Mining Equipment
4140 can be used for shafts, gears, pins, rollers and other mechanical components subjected to demanding service conditions.
Agricultural Machinery
Applications include shafts, gears, axles, pins and other high-strength components used in agricultural equipment.
Oil & Gas Industry
4140 alloy steel is used for selected high-strength mechanical components, tooling and equipment parts where suitable material properties are required.
General Engineering
The material is widely used for machine components, tooling, fixtures, studs, bolts, shafts and other engineered parts.
4140 Round Bars Heat Treatment
Heat treatment is one of the important characteristics of 4140 Alloy Steel. Different heat-treatment processes can be selected to obtain the required combination of hardness, tensile strength, yield strength and toughness.
Annealing
Annealing produces a relatively softer material condition and can improve machinability for subsequent manufacturing operations.
Normalizing
Normalizing can be used to refine the structure and obtain a suitable starting condition before further processing or heat treatment.
Hardening
Hardening increases the hardness and strength of 4140 through controlled heating followed by suitable cooling.
Quenching
Quenching is used as part of the hardening process. The selected quenching method depends on the section size, required properties and applicable heat-treatment procedure.
Tempering
Tempering after hardening helps reduce excessive brittleness and provides a practical balance between hardness, strength and toughness.
4140 Round Bars Manufacturer in Mumbai
Super Metal Manufacturing Co. Since 1965 is based at 7, Kika Street, Gulalwadi, 2/1, Kikabhai Mansion, Mumbai - 400004, India. We supply alloy steel products for industrial customers in India and international markets.
Customers looking for a reliable 4140 Round Bars Manufacturer in Mumbai can share their required diameter, length, quantity, material condition, surface finish and application. Our team can evaluate the requirement and provide suitable availability and quotation details.
4140 Round Bars Quality Assurance
Quality inspection is an important part of supplying engineering alloy steel products. Depending on customer requirements, 4140 Round Bars can be supplied with relevant quality documentation and inspection reports.
- Mill Test Certificate
- Chemical Composition Report
- Mechanical Test Report
- Dimensional Inspection
- Surface Inspection
- Third-Party Inspection on Request
4140 Round Bars Export Packing
For domestic and international orders, 4140 Round Bars can be packed according to the product dimensions and transportation requirements. Export packing may include steel bundling, wooden crates or skids, waterproof wrapping and protective packaging.
Packing requirements can be discussed before dispatch according to destination, shipping method and customer handling requirements.
MOQ, Lead Time & Payment
Minimum Order Quantity:
MOQ depends on diameter, length, quantity, stock availability
and production requirements.
Lead Time:
Delivery time depends on stock availability, quantity, cutting,
inspection and documentation requirements.
Payment Terms:
Commercial payment terms can be discussed according to the
customer's order quantity, destination and business requirements.
HS Code & Export Documentation
The applicable HS classification should be confirmed according to the exact product form and destination. Export documentation may include Commercial Invoice, Packing List, Bill of Lading or AWB, Mill Test Certificate and Certificate of Origin where applicable.
Typical 4140 Round Bars Applications
4140 Round Bars are commonly used for shafts, gears, axles, crankshafts, hydraulic components, pins, rollers, spindles, studs, machine parts and other high-strength engineering components.
Global Supply
Super Metal Manufacturing Co. supports international enquiries for 4140 / EN19 / 42CrMo4 bars and ships to customers in global markets. Our website currently lists export destinations across the Middle East, Europe, North America, Asia, Africa and other industrial markets.
Frequently Asked Questions (FAQs)
Who is a 4140 Round Bars Manufacturer in India?
Super Metal Manufacturing Co. Since 1965 supplies 4140 Alloy Steel Round Bars for industrial and engineering applications. Different diameters, lengths, finishes and material conditions can be supplied according to customer requirements.
What are 4140 Round Bars?
4140 Round Bars are solid circular chromium-molybdenum alloy steel bars commonly designated AISI 4140 or SAE 4140. They are used for high-strength mechanical and engineering components.
What is 4140 Round Bar used for?
4140 Round Bars are used for shafts, gears, axles, pins, crankshafts, spindles, rollers, studs, machine parts and other components used in automotive, machinery, construction, mining and general engineering.
Is AISI 4140 the same as SAE 4140?
AISI 4140 and SAE 4140 are commonly used designations for the same 4140 alloy steel grade family. The exact material specification and applicable standard should be checked for every purchase.
Is 4140 equivalent to EN19 and 42CrMo4?
4140, EN19 and 42CrMo4 are commonly compared for similar engineering applications, but they should not automatically be treated as identical. Exact equivalence should be verified against the applicable chemical and mechanical specifications.
What sizes are available in 4140 Round Bars?
4140 Round Bars can be supplied in different diameters and lengths. Super Metal Manufacturing Co. can discuss standard and customized sizes according to stock, production capability and customer requirements.
Can 4140 Round Bars be heat treated?
Yes. 4140 Round Bars can be supplied in annealed, normalized, hardened and tempered or quenched and tempered conditions depending on the required specification and application.
What surface finishes are available for 4140 Round Bars?
4140 Round Bars can be supplied in black, bright, turned, peeled, ground, forged or machined finishes depending on size, application and availability.
Do you provide Mill Test Certificates for 4140 Round Bars?
Yes. Mill Test Certificates and relevant quality documentation can be provided according to the applicable purchase specification and customer requirements.
How can I buy 4140 Round Bars from the manufacturer?
Send the required grade, diameter, length, quantity, surface finish, heat-treatment condition, inspection requirements and delivery location to Super Metal Manufacturing Co. by email or WhatsApp for availability and quotation.