4140 alloy steel is a versatile material commonly used for various applications. It is composed of 1% chromium and molybdenum, which enhances its hardenability and high tensile strength. In its hardened and tempered condition (T), it typically exhibits a tensile range of 850 to 1000 Mpa.
To improve its machinability, a modified version of 4140 alloy steel is now available. This variation allows for increased feeds and speeds during machining operations, while also extending the lifespan of tools. Importantly, these improvements do not compromise the mechanical properties of the steel.
Moreover, 4140 alloy steel can undergo further surface hardening processes such as flame or induction hardening. Additionally, it can be subjected to nitriding treatment to enhance its surface hardness.
Overall, 4140 alloy steel is a reliable and widely-used material that offers excellent versatility and mechanical properties for a range of applications.
The versatility of 4140 alloy round bar is unmatched in various industry sectors, making it an ideal choice for a wide range of applications. It finds extensive use in the manufacturing of critical components like arbors, adapters, crankshafts, axle shafts, and connection rods.
The alloy is also popularly used in conveyor pins and rolls, chuck bodies, collets, ejector pins, forks, gears, guide rods, hydraulic shafts, and various machined parts. Its exceptional strength and durability make it the perfect material for lathe and milling spindles, motor shafts, nuts, pinch bars, pinions, pump shafts, and rams, among others.
In addition, the alloy's high tensile strength and resistance to abrasion, impact, and wear make it the preferred choice for sprockets, sockets, spindles, studs, tool holders, torsion bars, and worms. Whether it's in woodworking or logging parts, 4140 alloy round bar has proven to be an indispensable material that consistently delivers reliable performance and durability.

Product Specifications
| Product Name | 4140 Alloy Round Bar | |
Size | O. D | 8-480mm |
W. T | 8-480mm | |
Length | 1-12m | |
Standard | AISI, ASTM, GB, DIN, BS, JIS | |
Grade | Some examples of alloy steel grades are 12Cr1MoV, Cr5Mo, 15CrMo, 30CrMo, 40CrMo, 20SiMn, 12Cr1MoVG, 15CrMoG, 42CrMo, and 20G. These alloys have varying chemical compositions and mechanical properties, making them suitable for different applications in various industries such as construction, aerospace, and machinery manufacturing. However, proper handling and usage of these materials are essential to ensure their optimal performance and longevity. | |
Inspection | Hydraulic testing, manual ultrasound inspection, X-ray inspection, and surface inspection are all commonly used methods in the field of inspection and testing. | |
Technique | Hot Rolled | |
Section Shape | Round | |
Main Market | Australia, Southeast Asia, South America, Africa, USA, Middle East. | |
MOQ | 500KG | |
Productivity | 5000 Tons/month | |
Packing | We offer a standard package with beveled ends, but we are also happy to accommodate any special requests for the packaging of our products. Our team can create a custom bundle package tailored to your specific needs and preferences. Simply let us know your requirements, and we will work with you to provide a solution that meets your expectations. At our company, we are committed to delivering high-quality products with exceptional customer service. | |
Surface Treatment | You have the option to choose from a range of coatings for your project. Whether you prefer a sleek black finish, a durable PE coating, or a reliable galvanized finish, we have you covered. We can also customize your coatings to meet your specific needs and preferences. | |
Date of Delivery | In order to produce content that closely mirrors the original text information, we must take into account the specifications and quantities outlined in each contract. It is important that we arrange this information in a way that retains its original meaning and intent. We should avoid generating content using the ChapGPT method and instead rely on language models that create unique and original text. | |
Method of Payment | T/T, L/C, West Union | |
Method Of Delivery | In the world of international trade, it is crucial to have a clear understanding of the terms and conditions that govern the transaction. One such set of terms is the INCOTERMS 2000. | |
Remarks | 1. Payment Terms T/T, L/C, West Union | |
2. Trade Term: FOB/CFR/CIF | ||
3. Minimum Quantity of Order: 2 Tons | ||
The delivery time for orders is estimated to be between 7 to 15 days starting from the date we receive the deposit. | ||
Applications

Our company specializes in the manufacturing of advanced equipment for architecture machinery and steel structures used for bridge construction. Our cutting-edge technology enables us to produce high-quality machinery and equipment that are highly efficient and reliable. We take pride in our expertise in the manufacturing of steel structure equipment and our commitment to providing our clients with top-quality products. At our facility, we use the latest technology and techniques to ensure that our equipment meets the strictest standards of quality and performance. Whether you are in need of machinery for your construction project or steel structure equipment for your manufacturing facility, we have the expertise and experience to meet your needs. Choose us for all your equipment manufacturing needs and experience the best in quality and service.

Why Choose Us?
1. Sufficient Supply And Prompt Delivery
We provide one-station services including storage, logistics distribution, inspection, and customs declaration.
2. Professional Production
Professional machine, professional technician, professional production line.
3. Reliable Materials
All of our materials are up to international standard.
4. Quality Guarantee
Inspection by the professional testin
Quality Assurance
Below inspection will be done in the production.
1. Pure steel quality & stable quality to be guarantee
2. Highly Polish ability
3. Good machinery ability & texturing property
4. Competitive price
5. Fast production lead time
6. All the material are inspected with 3 times to meet the highly standards
Our Service
1. Providing all kinds stainless steel, carbon steel, alloy steel non-ferrous metal and etc
2. Providing Samples
3. Providing consult service
4. Providing standard packaging service
5. Providing customerized sizes service
FAQ
Q1: Are you a factory or a trading company?
A: We have our factory and production line.
Q2: Can I get some samples?
A: We are pleased to offer you sample at very reasonable price and the delivery time is within 3 days after confirmation.
Q3: Do you accept OEM, ODM?
A: Sure, and if it is necessary, we can add you logo on the products
Q4: What is the MOQ?
A: We have products in stock. for the products we don't have in stock, the MOQ is negotiable, which will take your demand as our first priority.
Q5: How about the payment terms?
A: We accept T/T, L/C, Paypal, West Union and any other way if possible.
Q6: How about the quality control?
A: We have our own quality control system and we have also done SGS test. If necessary, we can support other third party inspection.
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