AISI 4340 Forged Round Steel Bars
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 10000 m.t./month
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AISI 4340 Forged Round Steel Bars
Products Details
| aisi 4340 forged steel round bars | |||||||||||
| Comparative standard | Grade | C | Si | Mn | Cr | Mo | V | W | P | S | Ni |
| GB | 40CrNiMoA | 0.36-0.44 | 0.10-0.350 | 0.45-0.70 | 1.10-1.40 | 0.20-0.35 | 0.03 | 0.02 | 1.30-1.7 | ||
| AISI | 4337/4340 | ||||||||||
| JIS | SNCM8 | ||||||||||
| DIN | 34CrNiMo6/1.6582 | 0.34 | max 0.40 | 0.65 | 1.50 | 0.23 | 0.03 | 0.03 | 1.50 | ||
| Dimensions | |||||||||||
| Round bar | |||||||||||
| Dia:10mm~700mm | Length:2m~6m | ||||||||||
| Flat bar | |||||||||||
| Thickness:10mm~500mm | Length:2m~12m | ||||||||||
| *Dimensions can be customized | |||||||||||
| Heat Treatment | |||||||||||
| Normalizing | 850-880°C | - | |||||||||
| Stress Relieving | 650°C | air cooling | |||||||||
| Quenching | 830-860°C | oil quenching | |||||||||
| Tempering | 540-660°C | ||||||||||
| 1.Normalizing | |||||||||||
| Normalizing temperature : 850-880°C | |||||||||||
| 2.Stress Relieving | |||||||||||
| Stress relieving to remove machining stresses should be carried out by heating to approx.650°C, | |||||||||||
| holding for 1-2 hours at heat,followed by air cooling . | |||||||||||
| This operation is performed to reduce distortion during heat treatment . | |||||||||||
| 3.Hardening | |||||||||||
| Harden from a temperature of 830-860°C followed by oil quenching. | |||||||||||
| Quenching temperature in the end quench test is 850°C. | |||||||||||
| 4.Tempering | |||||||||||
| tempering temperature: 540-660°C | |||||||||||
| Detail information | |||||||||||
| Process | EAF+LF+VD+Forging+(Rolling)+Annealing Condition (optional) | ||||||||||
| Delivery Condition | Hot forged+Rough machined/turned surface | ||||||||||
| MOQ | 1 ton | ||||||||||
| Technical Data | According to customer’s requirements of chemical composition, physical properties and mechanical testing | ||||||||||
| Ultrasonic Test | Ultrasonic test according to SEP 1921-84 G3 D/d E/d | ||||||||||
| Applications | |||||||||||
| Hot extrusion dies, forging die forging hammer, forging press die, precision forging die well as aluminum, copper and alloys die-casting mold. | |||||||||||
| Relevant documents | |||||||||||
| Contract Documents | Contract, Debit Note, PI(Performa Invoice) | ||||||||||
| Shipping Documents | B/L(Bill of Loading), Packing List, Shipping list, CI(Commercial Invoice) | ||||||||||
| Certifications | SGS, ISO9001-2008, UT(Ultrasonic Test), CO(Certificate of Original), MTC(Milling Test Certificate) | ||||||||||
Products Show
Product Overviews
| Product Name | Typical Grades | Diameter(mm) | Standard adopted |
| Carbon Steel | 20 (1020/S20C/C22) | Ø16-Ø300 |
GB/SAE/JIS/DIN
|
| 40 (1040/S40C/C40) | |||
| 45 (1045/S45C/C45) | |||
| Bearing Steel | GCr9 (51100/SUJ1) | Ø12-Ø250 | |
| GCr15 (52100/SUJ2/100Gr6) | |||
| GCr9SiMn (A485-Gr.1/SUJ3) | |||
Cr-Mo Steel | 20Cr (5120/SCr420H/20Cr4) | Ø12-Ø250 | |
| 40Cr (5140/SCr440/41Cr4) | |||
| 42CrMo(4140/SCM440/42CrMo4) | |||
| Gear Steel | 20CrNiMo | Ø16-Ø600 | |
| 20CrMn(5115/SMnC420/20MnCr5) | |||
| 20CrNiMo(8620/SNCM220/20CrMiMo2) |
Application
| Carbon Steel | Mold bottom, Plastic mold, Construction machinery parts Automobile parts, Security grills, Screens, Construction |
| Bearing Steel | Aerospace, Navigation, Nuclear energy, Chemical industry Electronic information, Petrochemical, Instrument and meter Transportation |
| Cr-Mo Steel | Mechanism & Fasteners gear, Stressed components for vehicles Engines and machines, Parts of larger cross-section |
| Gear Steel | All kinds of gears, Statically and dynamically stressed component for vehicles Engines and machine, Larger cross-section parts, Crankshafts |
Work Shop
Company Information
CNBM International Corporation is the most important trading platform of CNBM group.
Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.
FAQ
1, Your advantages?
professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale
2, Test & Certificate?
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem
3, Factory or Trading Company?
CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.
4, Payment Terms?
30% TT as deposit and 70% before delivery.
Irrevocable L/C at sight.
5, Trading Terms?
EXW, FOB, CIF, FFR, CNF
6, After-sale Service?
CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.
For any problem, please kindly contact us at any your convenient time.
We'll reply you in our first priority within 24 hours.
Packaging & Delivery
1, Packaging: seaworthy package or as required
2, Delivery: 35-45 days or based on quantity
- Q:What is the maximum length of a steel round bar?
- The maximum length of a steel round bar can vary depending on several factors such as the diameter of the bar, the manufacturing capabilities of the steel supplier, and the transportation limitations. Generally, steel round bars are produced in standard lengths that range from 6 to 12 meters (20 to 40 feet). However, it is possible to manufacture longer bars through special processes or by joining multiple bars together using welding techniques. In some cases, steel round bars can be custom-made to exceed standard lengths, but this would require specific arrangements with the supplier and considerations for logistics and handling during transportation. Ultimately, the maximum length of a steel round bar is determined by practical limitations and the specific requirements of the project or application.
- Q:What is the tensile strength of steel round bars?
- The tensile strength of steel round bars can vary depending on the specific grade and composition of the steel. However, on average, steel round bars typically have a tensile strength ranging from 400 to 700 megapascals (MPa).
- Q:How are steel round bars used in the construction of tunnels and underground structures?
- Steel round bars are commonly used in the construction of tunnels and underground structures as reinforcement for concrete. These bars are placed within the concrete to provide strength and stability, preventing the structure from cracking or collapsing under pressure. The steel round bars also enhance the overall durability and load-bearing capacity of the tunnel or underground structure, ensuring its long-term structural integrity.
- Q:Can steel round bars be used in the manufacturing of springs?
- Yes, steel round bars can be used in the manufacturing of springs. Steel round bars are commonly used as a raw material in spring manufacturing due to their high strength and durability. They can be formed, heat-treated, and shaped into various types of springs, such as compression springs, tension springs, and torsion springs, depending on the specific application requirements.
- Q:What are the different grades of steel used in round bars?
- The different grades of steel used in round bars vary depending on the desired properties and applications. Some common grades include mild steel (low carbon steel), stainless steel, alloy steel, and tool steel. Each grade offers specific characteristics such as strength, corrosion resistance, hardness, or machinability, allowing for a wide range of applications in industries like construction, manufacturing, automotive, and aerospace.
- Q:Are steel round bars corrosion-resistant?
- Yes, steel round bars can be corrosion-resistant depending on the type of steel used and any additional protective coatings or treatments applied.
- Q:Are steel round bars suitable for welding applications?
- Yes, steel round bars are suitable for welding applications. Steel is a commonly used material in welding due to its high strength and durability. Round bars have a consistent shape and provide good stability and support during the welding process. They can be easily welded using various methods such as MIG, TIG, or stick welding, making them ideal for a wide range of welding applications in industries like construction, manufacturing, and automotive.
- Q:Can steel round bars be used for making wire?
- Yes, steel round bars can be used for making wire. Steel round bars can be processed into wire by a process called wire drawing. In this process, the steel round bar is pulled through a series of progressively smaller dies to reduce its diameter until it reaches the desired wire size. This process is commonly used in the manufacturing of various types of wire, including steel wire used in construction, electrical wiring, fencing, and other applications. The steel round bars used for making wire are typically made from carbon steel, which provides the necessary strength and durability for the wire to be used in various applications.
- Q:Can steel round bars be used in the renewable energy industry?
- Yes, steel round bars can be used in the renewable energy industry. They are commonly used in the construction of wind turbine towers, solar panel structures, and hydroelectric power systems. Steel round bars offer high strength, durability, and resistance to corrosion, making them suitable for supporting and securing various renewable energy infrastructure components.
- Q:What are the different tolerances for steel round bars?
- There are various tolerances for steel round bars, depending on the specific requirements and standards set by different industries and applications. These tolerances ensure that the dimensions and surface conditions of the steel round bars meet the desired specifications. The most common tolerance for steel round bars is the diameter tolerance. This refers to the allowable deviation from the specified diameter. For example, a steel round bar with a diameter tolerance of +/- 0.005 inches means that the actual diameter of the bar can vary within this range. Another important tolerance for steel round bars is the straightness tolerance. This refers to the allowable deviation from a straight line over a specified length of the bar. Straightness tolerances are usually given in terms of the maximum deviation in relation to the length, such as 0.010 inches per foot. Surface finish tolerance is also crucial for steel round bars. It refers to the acceptable variation in the surface texture or roughness of the bar. This tolerance is often specified using parameters such as Ra (average roughness) or Rz (maximum roughness depth). For example, a surface finish tolerance of Ra 0.8 micrometers means that the average roughness of the bar's surface should not exceed this value. In addition to these common tolerances, there may be other specific tolerances based on the intended application of the steel round bars. These can include tolerances for straightness, length, weight, or other dimensional properties. It is important to note that the tolerances for steel round bars can vary depending on the standards followed by different industries and countries. It is always recommended to refer to the relevant standards or specifications to determine the specific tolerances required for a particular application.
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AISI 4340 Forged Round Steel Bars
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 10000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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