Alloy Steel Round Bars 42CrMo4

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 120000 m.t./month

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GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

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

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: Are steel round bars used in the construction industry?: Yes, steel round bars are commonly used in the construction industry. They are versatile and can be used in various applications, such as reinforcing concrete structures, providing structural support in buildings, and fabricating components for bridges, highways, and other infrastructure projects. Steel round bars offer high strength and durability, making them suitable for withstanding heavy loads and harsh environmental conditions. Additionally, their uniform shape and smooth surface allow for easy welding, bending, and machining, which makes them an ideal choice for construction projects.

Q: How do you prevent rust on steel round bars?: To prevent rust on steel round bars, there are several effective methods you can employ: 1. Apply a protective coating: One of the most common ways to prevent rust is by applying a protective coating such as paint, varnish, or enamel. These coatings act as a barrier, preventing moisture and oxygen from reaching the steel surface and causing rust. 2. Galvanization: Galvanizing steel round bars involves coating them with a layer of zinc. This process creates a protective barrier, as the zinc acts as a sacrificial anode, corroding instead of the steel. Galvanized steel is highly resistant to rust and is commonly used in outdoor applications. 3. Powder coating: Powder coating is another effective method of preventing rust on steel round bars. In this process, a dry powder is electrostatically applied to the steel surface, which is then cured under heat. The resulting coating provides excellent protection against rust and corrosion. 4. Regular cleaning and maintenance: Regularly cleaning your steel round bars and removing any dirt, moisture, or other corrosive substances can help prevent rust. Additionally, applying a rust inhibitor or lubricant can further protect the steel from corrosion. 5. Proper storage: Storing steel round bars in a dry and well-ventilated area can significantly reduce the risk of rust. Avoid storing them directly on the ground or in areas prone to moisture. Using pallets or racks to keep the steel elevated and properly spaced can also help prevent rust formation. 6. Avoid exposure to harsh environments: Exposing steel round bars to harsh environments, such as saltwater or acidic chemicals, significantly increases the risk of rust. If possible, try to protect the steel from prolonged exposure to these substances or consider using a more corrosion-resistant material in such conditions. By implementing these preventive measures, you can effectively reduce the likelihood of rust formation on steel round bars, ensuring their longevity and maintaining their structural integrity.

Q: What is the maximum copper content allowed for steel round bars?: The permissible copper content in steel round bars varies depending on the grade and industry standards. Generally, copper is regarded as an alloying element in steel and is usually added in small quantities to improve specific properties. For most steel round bars, the maximum acceptable copper content typically ranges from 0.50% to 1.00%. However, it is crucial to consider that this may differ based on the application and grade of steel utilized. To determine the maximum allowable copper content, it is advisable to refer to the applicable industry standards or specifications for the specific steel grade and application.

Q: Can steel round bars be used for structural purposes?: Yes, steel round bars can be used for structural purposes. They are commonly used in the construction industry for various applications, such as providing support and reinforcement in buildings, bridges, and other structures. The high strength and durability of steel make round bars an ideal choice for structural use, as they can withstand heavy loads and provide stability.

Q: Can steel round bars be used in the production of packaging equipment?: Yes, steel round bars can be used in the production of packaging equipment. Steel round bars are commonly used in various industries due to their high strength and durability. In packaging equipment, steel round bars can be used to provide structural support, reinforcement, or as components in the machinery's moving parts. The steel's hardness and resistance to wear and tear make it suitable for handling heavy loads and continuous operation. Additionally, steel round bars can be easily machined, welded, and modified to meet the specific requirements of the packaging equipment. Overall, steel round bars are a reliable and commonly used material in the production of packaging equipment.

Q: What is the difference between a cold-drawn and a centerless ground steel round bar?: Both cold-drawn and centerless ground steel round bars are distinct types of steel bars that have undergone different manufacturing processes, leading to varied characteristics and properties. To produce cold-drawn steel round bars, a hot-rolled or annealed steel bar is pulled through a die, decreasing its diameter and increasing its length. This procedure enhances the steel's mechanical properties, making it stronger, more precise in dimensions, and possessing a smoother surface finish. Cold-drawn bars exhibit superior tensile strength, improved surface finish, and tighter dimensional tolerances compared to hot-rolled bars. They are frequently employed in applications that necessitate precision and strength, such as automotive components, machinery parts, and construction materials. On the contrary, centerless ground steel round bars are created by passing a cylindrical steel bar through a grinding machine without the need for centers or support. This grinding process eliminates surface imperfections and deviations in diameter, resulting in a precise and smooth finish. Centerless ground bars offer exceptional dimensional accuracy, surface finish, and roundness. They are commonly utilized in applications where precision and tight tolerances are crucial, such as in the production of bearings, shafts, and hydraulic cylinders. In conclusion, the primary distinction between a cold-drawn steel round bar and a centerless ground steel round bar lies in the manufacturing process and the resultant properties. Cold-drawn bars are formed by pulling the steel through a die, leading to enhanced mechanical properties, tighter tolerances, and a smoother surface finish. Centerless ground bars are produced by grinding the steel to enhance dimensional accuracy, roundness, and surface finish. Both types of bars possess their own advantages and are suitable for different applications based on the required precision, strength, and surface finish.

Q: What are the advantages of using nickel-chromium alloy steel round bars?: There are several advantages of using nickel-chromium alloy steel round bars in various applications. Firstly, nickel-chromium alloy steel round bars have excellent corrosion resistance properties. The presence of nickel and chromium elements in the alloy enhances its ability to resist corrosion from various environmental factors such as moisture, chemicals, and oxidation. This makes these round bars suitable for use in challenging environments such as marine applications, chemical processing plants, and oil refineries. Secondly, nickel-chromium alloy steel round bars offer high temperature resistance. The combination of nickel and chromium elements in the alloy allows it to withstand elevated temperatures without losing its structural integrity. This makes them suitable for use in heat exchangers, furnaces, and other high-temperature applications. Additionally, nickel-chromium alloy steel round bars have superior mechanical properties. They exhibit excellent strength, toughness, and wear resistance, making them ideal for applications that require high load-bearing capabilities. These round bars also exhibit good ductility, allowing for ease of machining and fabrication. Moreover, nickel-chromium alloy steel round bars have good electrical conductivity. This makes them suitable for electrical and electronic applications where conductivity is essential, such as in the manufacturing of resistors, heating elements, and electrical connectors. Lastly, nickel-chromium alloy steel round bars are readily available and cost-effective. As a widely used material in various industries, these round bars are easily accessible and can be obtained at competitive prices. In summary, the advantages of using nickel-chromium alloy steel round bars include excellent corrosion resistance, high-temperature resistance, superior mechanical properties, good electrical conductivity, and cost-effectiveness. These characteristics make them a preferred choice for a wide range of applications in industries such as construction, automotive, aerospace, and electrical engineering.

Q: Can steel round bars be used in the manufacturing of pumps?: Indeed, pumps can be manufactured using steel round bars. These round bars are widely utilized in diverse industries owing to their robustness, longevity, and adaptability. In the realm of pump manufacturing, steel round bars are frequently employed as shafts or rotors due to their capacity to endure intense pressure and rotational forces. To meet the specific demands of pump designs, these round bars can be subjected to machining, forging, or heat treatment processes. Moreover, steel round bars offer exceptional resistance to corrosion, rendering them suitable for pumps deployed in a variety of environments. On the whole, steel round bars constitute a dependable and prevalent material in the realm of pump manufacturing.

Q: What are the different types of steel round bar surface finishes for improved lubricity?: There are several different types of steel round bar surface finishes that can be used to improve lubricity. 1. Smooth Finish: This is the most basic type of finish, where the surface of the round bar is made smooth through processes like grinding or polishing. A smooth finish helps to reduce friction and provides a good base for applying lubricants. 2. Chrome Plating: Chrome plating involves electroplating a layer of chromium onto the surface of the round bar. This creates a hard, smooth, and corrosion-resistant surface that provides excellent lubricity. Chrome plating is commonly used in applications where low friction and wear resistance are required. 3. Nitriding: Nitriding is a surface hardening process that involves diffusing nitrogen into the surface of the round bar. This creates a hard layer that enhances the lubricity of the steel. Nitriding is often used in applications where high wear resistance and improved lubrication are important. 4. Black Oxide: Black oxide is a chemical conversion coating that forms a black surface on the steel round bar. This finish provides a thin layer of protection against corrosion and also improves lubricity. Black oxide is commonly used in applications where lubricity is essential but a decorative appearance is not required. 5. Teflon Coating: Teflon coating, also known as PTFE (polytetrafluoroethylene) coating, involves applying a thin layer of Teflon onto the surface of the round bar. This coating provides excellent lubricity and low friction properties. Teflon coating is often used in applications where non-stick properties are required, such as in food processing or packaging industries. These are just a few examples of the different types of steel round bar surface finishes that can be used to improve lubricity. The choice of finish depends on the specific application requirements and the desired level of lubrication and wear resistance.

Q: Are steel round bars suitable for use in the marine industry?: Yes, steel round bars are suitable for use in the marine industry. Steel is known for its strength, durability, and corrosion resistance, making it an excellent choice for marine applications. Steel round bars are commonly used in shipbuilding, offshore structures, and other marine equipment due to their ability to withstand harsh weather conditions, saltwater exposure, and heavy loads. Additionally, steel's versatility allows for easy fabrication and customization to meet specific requirements in the marine industry.

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