Quenched and Tempered Steel SAE4140 SAE4145 SAE4340 SCM440 42CrMoS4 708M40 Steel Round Bar
- 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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Quenched and Tempered Steel SAE4140 SAE4145 SAE4340 SCM440 42CrMoS4 708M40 Steel Round Bar
Products Details
1. Chemical Composition and Mechanical Properties(In Quenched & Tempered State)
Material | 4140 | ||
Chemical Composition | Mechanical Properties(In Quenched & Tempered State) | ||
C | 0.38-0.45 | Tensile strength(MPA) | ≥1080 |
Si | 0.17-0.37 | Yield strength (MPA) | ≥930 |
Mn | 0.50-0.80 | Elongation(δ5/%) | 12 |
Cr | 0.90-1.20 | Reduction in Area (ψ/%) | 45 |
Mo | 0.15-0.25 | Impact (J) | 63 |
P | ≤0.035 |
Hardness |
≤217HB |
S | ≤0.035 | ||
Cu | ≤0.30 | ||
Ni | ≤0.30 | ||
2. Product Application Areas
Our products have been used in all kinds of areas, such as aviation,aerospace,navigation,nuclear energy,chemical industry,electronic information,achine manufacture, petrochemical, automotive,instrument and meter, Communication ,transportation, and medical instruments, etc.
3. Similar steel grade & equivalent steel materials
USA | Japanese | Gemany | British | France | International | Chinese |
ASTM&AISI&SAE | JIS | EN DIN | EN BS | EN NF | ISO | GB |
4140 | SCM440 | 42CrMo4 1.7225 | 42CrMo4 1.7225 | 42CrMo4 1.7225 | ------ | 42CrMo |
Product Sales Information
Material | 4140 steel round bar |
Size | Diameter:20mm-1000mm Length:500mm-6000mm |
Origin place | Made In China |
Delivery Condition | Hot rolled,cold drawn,forged |
Surface require | Black,grinding,bright,polish |
Heat treatment | Quenched,Tempered,annealed |
Packing | seaworthy packing ,wooden case ,carton,woven bag or at client's requires |
Delivery time | In 10-50 days |
Trade Term | EXW,FOB,CIF |
Payments | T/T or L/C at sight |
Port | China main Port,such as shanghai,Dalian,Shenzhen port. |
MOQ | 1 Ton |
Company Main Products
Alloy Steel | 4140, 4142, 42CrMo4, 1.7225, SCM440, 4130, SCM430, 25CrMo4, 1.7218, 34CrNiMo6, 1.6582, 4340, SNCM439, 36CrNiMo4, 1.6511, SACN645, 1340, SMn438, SNC236, |
Tool Steel | H13, 1.2344, SKD61, D2, SKD11, 1.2379, 1.2510, 01, SKS3, 95MnWCr5, D3, SKD1, 1.2419, SKS31, H21, SKD5, 1.2581, P20, 35CrMo7, 1.2738, 1.2316, M2 |
Bearing Steel | GCr15, 52100, SUJ1, SUJ2, 100Cr6, 1.2067, 55C, 8620, 4320, 9310, 440C, M50 |
Spring Steel | 9260, SUP6, SUP7, 1.7108, 54SiCr6, 1.7102, 5155, SUP9, 1.7176, 5160, 1.7177, 6150, SUP10, 51CrV4, 1.8159 |
Stainless Steel | 321, sus321, 1.4541, 304, SUS304, 1.4301, 410, SUS410, 1.4006, 420, 1.4021, 1.4028, 434, 1.4113, 316L, SUS316L, 1.4435, 630, 1.4542, 431, 1.4057, |
Products Show
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:Can steel round bars be coated?
- Indeed, it is possible to coat steel round bars. Coating them yields numerous advantages, such as enhanced resistance to corrosion, increased durability, and improved visual appeal. The most commonly utilized coatings for steel round bars encompass galvanized coatings, epoxy coatings, and powder coatings. Galvanized coatings encompass the application of a zinc layer onto the steel's surface, which provides exceptional protection against corrosion. Epoxy coatings, on the other hand, find common application in industrial settings due to their remarkable chemical resistance and ability to withstand harsh environments. Powder coatings, involving the electrostatic application of a dry powder, are then cured under heat to form a robust and protective layer. These coatings can be employed on steel round bars to safeguard against rust and other forms of corrosion, thereby rendering them suitable for a broad scope of applications across various industries, including construction, manufacturing, and automotive.
- Q:Are steel round bars susceptible to rust?
- Steel round bars are indeed susceptible to rust. Rust is the result of a chemical reaction between iron and oxygen in the presence of moisture. Since steel is primarily made of iron, it can rust when exposed to air and moisture. However, the susceptibility to rust can be reduced by taking certain preventive measures. Steel round bars can be coated with protective layers such as paint, oil, or galvanized coatings to create a barrier between the steel and the surrounding environment, thus preventing or delaying the onset of rust. Regular maintenance, including cleaning and reapplying protective coatings, can further help in minimizing the risk of rust formation on steel round bars.
- Q:Can steel round bars be used for making tie rods?
- Yes, steel round bars can be used for making tie rods.
- Q:Can steel round bars be used for making molds?
- While steel round bars can be utilized in mold production, they may not be the most customary or optimal choice of material. Typically, steel round bars find application in structural or support roles. In the realm of mold fabrication, other materials such as silicone, aluminum, or specific steel molds are generally favored. These alternatives provide superior resistance to heat, flexibility, and convenience for molding purposes. Nevertheless, if the steel round bars are appropriately machined, shaped, and treated, they can still serve in fashioning uncomplicated molds for specific applications. However, prior to employing steel round bars, it is crucial to consider the mold's specific requirements, including the material being molded, the temperature and pressure conditions, and the desired final product finish.
- Q:What is the typical lead time for manufacturing steel round bars?
- The lead time for manufacturing steel round bars can vary depending on different factors, including the bars' size and quantity, the complexity of the manufacturing process, and the manufacturer's production capacity. Typically, manufacturing steel round bars takes anywhere from a few days to several weeks. When it comes to standard sizes and quantities, the lead time is usually shorter since manufacturers keep them in stock. However, custom orders or larger quantities require additional processes such as sourcing raw materials, cutting, heat treating, and quality control checks, which can extend the lead time. It's important to consider that market demand and the manufacturer's production schedule can also impact lead times. During periods of high demand or limited production capacity, lead times may be longer. Conversely, during times of low demand or surplus production capacity, lead times can be shorter. To get an accurate estimate of the lead time for manufacturing steel round bars, it is recommended to directly contact specific manufacturers or suppliers. They will be able to provide more precise information based on their capabilities and current workload.
- Q:How are steel round bars used in the construction of high-rise buildings?
- Steel round bars are commonly used in the construction of high-rise buildings as they provide structural support and reinforcement. These bars are used in various applications such as columns, beams, and foundations to enhance the overall strength and stability of the structure. Additionally, steel round bars provide flexibility in design, allowing for efficient load distribution and resistance against external forces such as earthquakes and high winds.
- Q:How do you prevent rust on steel round bars?
- To prevent rust on steel round bars, you can apply a protective coating such as paint, oil, or a rust inhibitor. Regular cleaning and maintenance, including keeping the bars dry and free from moisture, can also help prevent rust formation.
- Q:What are the different grades of alloy steel round bars?
- There are several different grades of alloy steel round bars, including but not limited to, 4140, 4340, 8620, and 52100. Each grade offers specific properties and characteristics that make them suitable for different applications and industries.
- Q:What are the different types of steel round bar surface treatments used in the automotive industry?
- In order to enhance the performance, durability, and aesthetics of components in the automotive industry, various surface treatments are utilized for steel round bars. Some commonly employed treatments include: 1. Phosphating: Widely used, this treatment involves the application of a phosphate coating onto the steel round bar. Its purpose is to improve corrosion resistance and establish a suitable foundation for further coatings or paints. 2. Galvanizing: Another method is to apply a layer of zinc onto the surface of the steel round bar. This treatment offers excellent corrosion resistance and extends the lifespan of the component. 3. Electroplating: By utilizing an electric current, a thin layer of metal, such as chrome or nickel, is deposited onto the steel round bar's surface. This treatment enhances appearance, provides corrosion resistance, and improves wear resistance. 4. Powder coating: A popular technique involves the application of a dry powder onto the surface of the steel round bar, followed by heating to form a protective coating. This treatment ensures exceptional durability, corrosion resistance, and can be customized with different colors and finishes. 5. Anodizing: Typically used for aluminum components, anodizing can also be applied to steel round bars in specific cases. This treatment involves the creation of an oxide layer on the surface, resulting in improved corrosion resistance and enhanced appearance. 6. Black oxide coating: A chemical treatment that produces a blackened surface on the steel round bar. This treatment offers corrosion resistance, improved aesthetics, and can serve as a lubricant in certain applications. It is crucial to consider the specific requirements of the automotive component, including environmental conditions, desired appearance, and functional properties when selecting the appropriate surface treatment. Manufacturers meticulously choose the most suitable treatment to ensure optimal performance and longevity of steel round bars in the automotive industry.
- Q:Can steel round bars be used for hydraulic cylinder applications?
- Yes, steel round bars can be used for hydraulic cylinder applications. Steel round bars are often used in the construction of hydraulic cylinders due to their high strength and durability. They provide excellent resistance to impact, corrosion, and wear, making them suitable for heavy-duty applications. Additionally, steel round bars can be easily machined and fabricated to meet specific dimensional requirements for hydraulic cylinder components. Therefore, steel round bars are a popular choice for hydraulic cylinder applications.
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Quenched and Tempered Steel SAE4140 SAE4145 SAE4340 SCM440 42CrMoS4 708M40 Steel Round Bar
- 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
OKorder Financial Service
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