4140 Hollow Bar Stockist
Super Metal Manufacturing Co. is a reliable 4140 Hollow Bar Stockist supplying high-strength AISI 4140 alloy steel hollow bars for engineering, automotive, hydraulic, machinery, construction, oil and gas, mining and general industrial applications. Our 4140 Hollow Bars are available in different outside diameters, inside diameters, wall thicknesses and lengths according to customer requirements and stock availability.
AISI 4140 is a chromium-molybdenum alloy steel known for its high strength, toughness, hardenability and wear resistance. 4140 Hollow Bars are particularly useful for engineering components where a hollow geometry can provide material efficiency while maintaining the required mechanical performance.
As an experienced 4140 Hollow Bar Stockist, we maintain access to different sizes and material conditions for customers requiring quick supply. Depending on availability and specification, bars can be supplied in annealed, normalized, hardened and tempered or quenched and tempered conditions.
Customers can provide their required outside diameter, inside diameter, wall thickness, length, quantity, surface finish and material condition. Our team can then check suitable stock availability and provide a commercial quotation according to the required specification.
Our 4140 Hollow Bar Stock is selected for dimensional accuracy, material quality and suitability for machining and engineering applications. Stock can be supplied in standard and customized sizes depending on availability and customer requirements.
We support cut-to-length requirements and can coordinate inspection and material documentation for industrial orders. Customers requiring specific heat treatment, surface finish or dimensional tolerances can share their technical specifications before placing an order.
Super Metal Manufacturing Co. supplies 4140 Hollow Bars to manufacturers, OEMs, engineering companies, machinery manufacturers, fabricators, distributors and industrial buyers. Our stocking and supply capabilities help customers source alloy steel hollow products for both regular and project-based requirements.
What are 4140 Hollow Bars?
4140 Hollow Bars are hollow alloy steel bars manufactured from AISI 4140 chromium-molybdenum steel. Unlike solid round bars, hollow bars contain an internal bore and are selected for applications where the component design requires a hollow section combined with high-strength alloy steel properties.
AISI 4140 is identified by UNS G41400 and is commonly compared with grades such as 42CrMo4, 1.7225, EN19 and SCM440 depending on the applicable standard. Exact grade equivalence should be confirmed against the required purchasing and material specification.
The chromium and molybdenum alloying elements provide good hardenability and contribute to the mechanical performance of 4140 steel. The material can be heat treated to obtain a suitable balance of strength, hardness and toughness for demanding engineering applications.
4140 Hollow Bar Stockist and Supplier
Super Metal Manufacturing Co. supplies 4140 Hollow Bars for industrial and engineering requirements. As a stockist, we support customers looking for readily available alloy steel hollow bars in standard and customized dimensions.
Our supply range can include different outside diameters, inside diameters, wall thicknesses and lengths. Customers can share drawings or technical specifications when a precise dimensional requirement is needed.
We also support bulk requirements for manufacturers and distributors. For project orders, customers can provide the required grade, dimensions, quantity, heat-treatment condition and delivery location to receive stock and quotation details.
Advantages of 4140 Hollow Bars
4140 Hollow Bars combine the mechanical properties of chromium-molybdenum alloy steel with a hollow section. This can make them suitable for selected shafts, sleeves, hydraulic components and other engineered parts where weight and material efficiency are important considerations.
- High tensile strength
- Good yield strength
- Excellent hardenability
- Good toughness
- Good wear resistance
- Suitable for heat treatment
- Good resistance to mechanical stress
- Suitable for heavy-duty engineering applications
- Suitable for machining
- Material-efficient hollow construction
- Available in customized dimensions
- Suitable for stock and bulk requirements
4140 Hollow Bar Standards and Equivalent Grades
| Country standards | UNS | AISI | ASTM A29 | DIN 17200 | BS 970 | JIS G4105 | GB/T 3077 | AS 1444 |
|---|---|---|---|---|---|---|---|---|
| Grades | G41400 | 4140 | 4140 | 1.7225 / 42CrMo4 | EN 19 / 42CrMo4 | SCM440 | 42CrMo | 4140 |
4140 Hollow Bar Chemical Composition
4140 alloy steel contains carbon, silicon, manganese, chromium and molybdenum. These alloying elements contribute to its strength, hardenability, toughness and wear resistance.
| Element | Composition |
|---|---|
| Carbon (C) | 0.38 – 0.43% |
| Silicon (Si) | 0.15 – 0.35% |
| Manganese (Mn) | 0.75 – 1.00% |
| Chromium (Cr) | 0.80 – 1.10% |
| Molybdenum (Mo) | 0.15 – 0.25% |
| Phosphorus (P) | 0.035% Max |
| Sulfur (S) | 0.040% Max |
4140 Hollow Bar Mechanical Properties
The mechanical properties of 4140 Hollow Bars vary according to section size, manufacturing route and heat-treatment condition. The material can be heat treated to obtain the required strength, hardness and toughness.
| Property | Typical Condition |
|---|---|
| Tensile Strength | Depending on heat-treatment condition |
| Yield Strength | Depending on section size and condition |
| Elongation | Depending on material condition |
| Hardness | Depending on heat treatment |
| Impact Toughness | Depending on material condition |
4140 Hollow Bar Manufacturing Process
The manufacturing process begins with alloy steel material having the required chemical composition. Controlled heating and forming operations are used to produce the hollow section according to the required dimensions.
Depending on the manufacturing route and product requirements, processes such as hot working, piercing, forging and machining may be used. The outside diameter, inside diameter and wall thickness are controlled according to the specified dimensional requirements.
After forming, the hollow bars can undergo suitable heat treatment such as annealing, normalizing, hardening and tempering or quenching and tempering. The selected condition depends on the required mechanical properties and intended application.
Final operations can include straightening, cutting, machining and surface finishing. Inspection can include dimensional checking, chemical analysis, hardness testing, mechanical testing and surface inspection according to customer requirements.
4140 Hollow Bar Applications
4140 Hollow Bars are used in demanding engineering applications where high strength, toughness and reliable mechanical performance are required.
- Automotive Industry: Shafts, axles, sleeves and high-strength components.
- Hydraulic Equipment: Hydraulic components, sleeves and selected cylinder components.
- Industrial Machinery: Machine components, shafts, couplings and mechanical parts.
- Oil & Gas: Selected high-strength machinery and equipment components.
- Construction Equipment: Heavy-duty machinery components.
- Mining Equipment: Components exposed to high mechanical loads.
- Power Transmission: Shafts, sleeves and selected mechanical components.
- General Engineering: Machined and fabricated engineering components.
- Manufacturing: Components requiring high-strength alloy steel.
4140 Hollow Bar Heat Treatment
4140 alloy steel is suitable for different heat-treatment conditions. Depending on the required properties, hollow bars can be supplied in annealed, normalized, hardened and tempered or quenched and tempered conditions.
Heat treatment can improve hardness and strength while maintaining an appropriate level of toughness. The required condition should be selected according to the applicable material standard and end-use requirements.
Alloy Steel 4140 Hollow Bars Dimensions Standard
| Outside Diameter | Inside Diameter | Wall Thickness | Length |
|---|---|---|---|
| As per requirement | As per requirement | As per requirement | 1000 mm to 6000 mm |
| Custom OD | Custom ID | Custom Thickness | Cut-to-Length Available |
4140 Hollow Bars can be supplied in different outside diameters, inside diameters, wall thicknesses and lengths according to stock availability and customer requirements. Customized dimensions and cut-to-length services can be discussed for specific applications.
Certifications & Quality Assurance
We maintain robust quality processes and can provide the following documents with shipments:
- Mill Test Certificate
- Quality Management: ISO certificate
- Third-party inspection reports (TPI) available on request
- Chemical Composition Report
- Mechanical Test Report
- Dimensional Inspection Report
Export Packing & Shipping
Typical export packing: steel bundles, wooden crates or skids, waterproof wrapping and fumigated wood where required. We ship from the nearest major port and can handle CIF/FOB/EXW terms depending on buyer preference.
MOQ, Lead Time & Payment
Minimum Order Quantity (MOQ): Contact us for exact MOQ per size/grade.
Lead Time: In-stock items: 1–3 weeks, subject to inspection and documentation. Mill direct and custom production: 3–8 weeks depending on order size.
Payment Terms: Contact us to choose payment terms.
HS Code & Export Documentation
HS classification can vary according to the exact product form and destination-country customs requirements. Documents supplied can include Commercial Invoice, Packing List, Bill of Lading / AWB, Mill Test Certificate and Certificate of Origin (COO), where required.
Typical Applications
4140 Hollow Bars are commonly used for shafts, sleeves, axles, hydraulic components, machine parts, automotive components, construction equipment, mining machinery, oil and gas equipment and other high-strength engineering components.
Export Destinations (Selected)
We supply 4140 Hollow Bars to international markets across Europe, the Middle East, Africa, Asia and North America. Export requirements can be arranged according to destination country, product dimensions, quantity, inspection requirements and delivery terms.
Frequently Asked Questions
What are 4140 Hollow Bars?
4140 Hollow Bars are high-strength chromium-molybdenum alloy steel hollow bars used for engineering, automotive, hydraulic, machinery, construction, oil and gas and industrial applications.
What is the equivalent grade of 4140 Hollow Bars?
AISI 4140 is identified as UNS G41400 and is commonly compared with 42CrMo4, 1.7225, EN19 and SCM440 depending on the applicable material standard.
Can 4140 Hollow Bars be supplied from stock?
Yes. Stock availability depends on the required outside diameter, inside diameter, wall thickness, length, quantity and material condition. Contact us with your exact requirements for current availability.
Can 4140 Hollow Bars be heat treated?
Yes. 4140 Hollow Bars can be supplied in suitable heat-treated conditions including annealed, normalized, hardened and tempered and quenched and tempered conditions.
What are 4140 Hollow Bars used for?
They are commonly used for shafts, sleeves, axles, hydraulic components, automotive parts, industrial machinery, construction equipment, mining machinery and other high-strength engineering components.
Can you supply customized 4140 Hollow Bar sizes?
Yes. Customized outside diameter, inside diameter, wall thickness and cut-to-length requirements can be discussed according to customer drawings and technical specifications.
How can I request a price quotation?
You can share your grade, outside diameter, inside diameter, wall thickness, quantity and delivery location via WhatsApp, email or our Request a Quote form.
What details do you need to provide a quotation?
Please provide the required grade, dimensions, quantity, preferred standards, heat-treatment condition and delivery location.
What payment terms do you offer?
We accept bank transfer (TT), LC and advance payment depending on order size, buyer requirements and agreed commercial terms.
How long does delivery take?
Stock items can generally be dispatched within the agreed lead time after order confirmation, while custom manufacturing may require additional time depending on specifications, quantity, heat treatment and inspection.
Can I get a sample before ordering?
Yes. Sample requirements can be discussed with our sales team depending on product dimensions, quantity and application.
How do you pack 4140 Hollow Bars for export?
We use suitable export packing such as steel bundles, wooden boxes or pallets, waterproof HDPE wrapping and proper product identification for safe transportation.
Do you offer bulk order discounts?
Yes, we offer competitive pricing for bulk quantities, repeat buyers and long-term supply contracts.