4140 Round Bar Supplier in Kolkata
Super Metal Manufacturing Co. Since 1965 is a reliable 4140 Round Bar Supplier in Kolkata, serving engineering companies, automotive component manufacturers, machinery manufacturers, fabricators, forging companies, OEMs and industrial buyers with alloy steel round bars.
Kolkata has a well-established steel, engineering and metal-trading ecosystem. Local business listings include steel distributors, alloy-steel dealers, metal suppliers and manufacturers operating across areas such as Burrabazar, Manicktala, Bowbazar, Chandni Chowk and other industrial locations.
Our 4140 Round Bars are suitable for customers requiring alloy steel with a useful combination of strength, toughness, hardenability and wear resistance. The material can be supplied according to the required grade, diameter, length, finish and heat-treatment condition.
We support requirements from industrial and commercial locations including Howrah, Durgapur, Haldia, Dankuni, Bidhannagar, Rajarhat, Barasat and nearby West Bengal industrial areas, subject to product availability and customer requirements.
What is 4140 Round Bar?
4140 Round Bar is a chromium-molybdenum alloy steel round bar commonly identified by designations such as AISI 4140, SAE 4140 and UNS G41400. It is widely used in engineering and mechanical applications where strength, toughness and hardenability are required.
Chromium and molybdenum contribute to the hardenability and mechanical performance of 4140 alloy steel. Depending on the heat-treatment condition, 4140 can achieve different combinations of hardness, tensile strength and toughness.
4140 Round Bars can be machined through turning, drilling, milling, threading and grinding under appropriate material and machining conditions. This makes them suitable for shafts, gears, pins, spindles, rollers, studs, axles and other mechanical components.
4140 is also commonly associated with specifications such as EN19, 42CrMo4 and DIN 1.7225. Exact equivalence should always be confirmed against the applicable standard, chemical composition and mechanical-property requirements.
Advantages of 4140 Round Bars
4140 Alloy Steel Round Bars are selected for demanding engineering applications because of their balance of strength, toughness and hardenability. Major advantages include:
- High Strength: Suitable for components subjected to substantial mechanical loading.
- Good Toughness: Provides a useful balance between strength and toughness after suitable heat treatment.
- Good Hardenability: Chromium and molybdenum contribute to hardenability in suitable sections.
- Good Wear Resistance: Suitable heat treatment can improve resistance to mechanical wear.
- Fatigue Performance: Suitable for components exposed to repeated mechanical loading.
- Machinability: Can be machined into various engineering components under appropriate material conditions.
- Heat Treatment Capability: Can be supplied in different material conditions according to application requirements.
4140 Round Bar Manufacturing Process
The production and processing of 4140 Round Bars involves controlled stages to achieve the required dimensions, surface finish and mechanical properties. The exact production route depends on the required size, grade specification and supply condition.
Raw Material Selection
Suitable chromium-molybdenum alloy steel is selected according to the specified 4140 grade and applicable material standard.
Heating
The alloy steel is heated under controlled conditions before hot working to support consistent rolling or forging.
Hot Rolling
Heated alloy steel is processed through rolling equipment to obtain the required round-bar profile and approximate dimensions.
Forging
Forging can be used for specific 4140 applications where forged material is required for heavy-duty engineering components.
Heat Treatment
Depending on the specified material condition, 4140 Round Bars may undergo annealing, normalizing, hardening, quenching and tempering.
Cutting and Straightening
Bars can be straightened and cut to standard or customer-specified lengths according to order requirements.
Surface Finishing
4140 Round Bars can be supplied in black, bright, turned, peeled, ground or forged finishes depending on size and requirements.
Inspection
Inspection may include chemical analysis, dimensional inspection, surface inspection and mechanical testing according to the applicable specification.
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 | Bright, Black, Forged, Turned Bright |
| Form | Round, Billet, Ingot, Forging |
| 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 alloy steel contains carbon, manganese, silicon, chromium and molybdenum. These alloying elements contribute to the material's strength, hardenability and mechanical performance.
Actual chemical composition should always be confirmed against the applicable material standard and Mill Test Certificate for the supplied heat.
| 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 |
4140 Round Bars Mechanical Properties
Mechanical properties depend on the material condition, heat treatment, section size and applicable specification. Representative values should be confirmed against the specified material condition and test certificate.
| Property | Typical Value / Range |
|---|---|
| Tensile Strength | 850 – 1000 MPa |
| Hardness (Q&T) | 28 – 34 HRC |
| Material Condition | As Specified / Heat Treated |
4140 Round Bars Applications in Kolkata
4140 Round Bars are suitable for a wide range of engineering, automotive, machinery, forging, fabrication and industrial applications in Kolkata and the surrounding West Bengal industrial belt.
Automotive Components
4140 Round Bars can be used for suitable shafts, axles, gears, pins, crankshafts and other automotive components according to design and material requirements.
Engineering Components
Engineering manufacturers can use 4140 alloy steel for shafts, spindles, rollers, studs, pins, axles and customized mechanical components.
Forging Components
4140 alloy steel is commonly selected for suitable forged components where strength, toughness and hardenability are required.
Machinery Manufacturing
4140 is suitable for selected machinery components exposed to mechanical loading, torsional stresses and repeated operation.
Hydraulic Components
4140 Round Bars can be considered for suitable shafts, pins and other mechanically loaded hydraulic components, subject to design and service requirements.
CNC Machining
4140 Round Bars can be machined into precision shafts, pins, rollers, spindles and other components when the selected material condition and machining parameters are appropriate.
4140 Round Bars Heat Treatment
4140 alloy steel can undergo different heat-treatment processes to achieve the required balance of hardness, strength and toughness. The selected process depends on the final application and specified mechanical properties.
Annealing
Annealing provides a relatively softer material condition and can support machining and subsequent processing.
Normalizing
Normalizing can help establish a suitable and uniform microstructure.
Hardening
Hardening increases hardness and strength through controlled heating and cooling.
Quenching
Quenching forms part of the hardening process and the appropriate cooling method depends on section size and required properties.
Tempering
Tempering after hardening helps achieve a suitable balance between strength, hardness and toughness.
4140 Round Bar Supplier for Kolkata
Super Metal Manufacturing Co. supplies 4140 Round Bars for Kolkata industrial and engineering requirements. Our supply service is suitable for manufacturers, machinery companies, fabricators, OEMs, automotive companies, forging companies and engineering industries requiring alloy steel round bars.
Customers from Kolkata and nearby industrial areas can contact us with the required grade, diameter, length, quantity, finish and material condition. We can check suitable product availability and provide commercial details based on the requirement.
4140 Round Bar Supplier for Burrabazar
Burrabazar is one of Kolkata's major commercial and metal-trading areas. Customers requiring 4140 Round Bars for engineering, machining, fabrication and industrial requirements can contact Super Metal Manufacturing Co. for suitable material specifications.
4140 Round Bar Supplier for Manicktala
Manicktala and surrounding areas have established steel and metal businesses. We support 4140 Alloy Steel Round Bar requirements for suitable shafts, pins, rollers, machinery parts and engineering applications.
4140 Round Bar Supplier for Bowbazar
Customers in Bowbazar and nearby commercial areas can contact us for 4140 Round Bars required for engineering, fabrication and industrial applications according to specified grade, size and quantity.
4140 Round Bar Supplier for Chandni Chowk
Chandni Chowk and central Kolkata have an established metal and engineering trading ecosystem. We can supply 4140 Round Bars for suitable machining, fabrication and industrial requirements.
4140 Round Bar Supplier for Howrah
Howrah is an important engineering and manufacturing centre adjoining Kolkata. Super Metal Manufacturing Co. can supply 4140 Alloy Steel Round Bars for suitable machinery, automotive, fabrication and engineering requirements in Howrah.
4140 Round Bar Supplier for Dankuni
Dankuni and its surrounding industrial belt support manufacturing, warehousing and engineering activities. Customers requiring 4140 Round Bars can share their specifications for availability and quotation.
4140 Round Bar Supplier for Haldia
Haldia is an important industrial location in West Bengal. 4140 Round Bars can be supplied for suitable machinery, engineering, fabrication and industrial applications according to customer requirements.
4140 Round Bar Supplier for Durgapur
Durgapur is a major industrial and steel-producing region in West Bengal. We support 4140 Round Bar requirements for suitable engineering, automotive, machinery, forging and fabrication applications.
4140 Round Bar Supplier for Bidhannagar
Customers in Bidhannagar and nearby industrial and commercial locations can contact Super Metal Manufacturing Co. for 4140 Alloy Steel Round Bars according to required diameter, length, quantity and material condition.
4140 Round Bar Supplier for Rajarhat
Rajarhat and surrounding areas are connected to Kolkata's wider commercial and industrial network. We can supply 4140 Round Bars for suitable engineering and industrial requirements.
4140 Round Bar Supplier from Mumbai
Super Metal Manufacturing Co. is based in Mumbai, Maharashtra and supplies 4140 Alloy Steel Round Bars to customers across India. Our supply network supports industrial requirements in Kolkata, West Bengal and other major manufacturing centres.
We supply AISI 4140, SAE 4140, EN19 and 42CrMo4 Round Bars for engineering, automotive, machinery, construction, mining and general industrial applications.
4140 Round Bars Quality Assurance
Quality documentation and material traceability are important for alloy steel products used in engineering applications. Relevant documentation can be supplied according to the applicable specification and customer purchase order requirements.
- Mill Test Certificate
- Chemical Composition Report
- Mechanical Test Report
- Dimensional Inspection Report
- Surface Inspection
- Material Traceability
- Third-Party Inspection on Request
4140 Round Bars Export Packing
4140 Round Bars can be packed according to product dimensions, quantity and transportation requirements. Export packing may include steel bundles, wooden crates or skids, protective wrapping and waterproof packaging where required.
MOQ, Lead Time & Payment
Minimum Order Quantity:
MOQ depends on diameter, quantity, stock availability and production
requirements.
Lead Time:
Lead time depends on stock availability, quantity, cutting, inspection,
heat treatment and documentation requirements.
Payment Terms:
Commercial payment terms can be discussed according to order quantity,
destination and customer requirements.
Why Choose Super Metal for 4140 Round Bars?
- Since 1965: Decades of experience in the metal industry.
- 4140 Alloy Steel Supply: Supply of AISI 4140 and related alloy steel grades.
- Industrial Supply: Suitable for engineering, automotive, forging and manufacturing requirements.
- Multiple Sizes: Different diameters and lengths according to specification and availability.
- Multiple Finishes: Bright, black, forged and turned finishes.
- Heat Treatment: Annealed, normalized and heat-treated conditions according to requirements.
- Quality Documentation: Relevant material and inspection documentation can be supplied.
- Pan-India Supply: Supply support for Kolkata, Howrah, West Bengal and other industrial locations across India.
Frequently Asked Questions (FAQs)
Who is a 4140 Round Bar Supplier in Kolkata?
Super Metal Manufacturing Co. Since 1965 is an experienced 4140 Round Bar Supplier from Mumbai, India, supplying 4140 Alloy Steel Round Bars for industrial and engineering requirements in Kolkata and other locations.
What is 4140 Round Bar?
4140 Round Bar is a chromium-molybdenum alloy steel round bar commonly specified as AISI 4140, SAE 4140 and UNS G41400. It is widely used for high-strength mechanical and engineering components.
What are 4140 Round Bars used for?
4140 Round Bars are used for shafts, gears, axles, pins, spindles, rollers, crankshafts, studs and other mechanically loaded components used in automotive, machinery, engineering, forging and industrial applications.
Can you supply 4140 Round Bars to Kolkata?
Yes. Super Metal Manufacturing Co. supplies 4140 Round Bars for customers in Kolkata and surrounding industrial areas, subject to product availability, order quantity and applicable specifications.
Can you supply 4140 Round Bars to Howrah and Durgapur?
Yes. 4140 Round Bars can be supplied for suitable industrial requirements in Howrah, Durgapur, Haldia and other West Bengal manufacturing areas, subject to availability and customer specifications.
What sizes of 4140 Round Bars are available?
4140 Round Bars can be supplied in different diameters and lengths according to the applicable specification, stock availability and customer requirements.
Can 4140 Round Bars be supplied heat treated?
Yes. Depending on the required specification, 4140 Round Bars can be supplied in annealed, normalized, quenched and tempered, or hardened and tempered conditions.
What finishes are available for 4140 Round Bars?
4140 Round Bars can be supplied in bright, black, forged, turned, peeled, ground and other specified finishes depending on size and customer requirements.
Do you provide Mill Test Certificates?
Yes. Relevant material and inspection documentation can be supplied according to the applicable specification and customer purchase order requirements.
How can I request a quotation for 4140 Round Bars in Kolkata?
You can send the required grade, diameter, length, quantity, finish and heat-treatment condition by email or WhatsApp to receive availability and commercial details.