Hot Rolled Alloy Structural Steel Round Bar SCM440

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 1

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 2

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 3

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 4

Hot Rolled Alloy Structural Steel Round Bar SCM440

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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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Standard	Grade	C	Cr	Mo	Si	Mn	P	S	Ni	Cu

GB	42CrMo	0.38-0.45	0.90-1.20	0.15-0.25	0.17-0.37	0.50-0.80	0.035	0.035	0.3	0.3
JIS	SCM440	0.38-0.43	0.90-1.20	0.15-0.30	0.15-0.35	0.60-0.90	0.03	0.03	0.25	0.3
ASTM	4140	0.38-0.43	0.80-1.10	0.15-0.25	0.15-0.35	0.75-1.00	0.035	0.04	—	—
ENISO	42CrMo4	0.38-0.45	0.90-1.20	0.15-0.30	≤0.40	0.60-0.90	0.035	0.035	—

Grade	aisi4140 astm4140 sae4140 42CrMo,1.7225,scm440,42CrMo4
Processing	EAF+LF+VD
Commodity	steel round bar/round steel bar/round bar steel
Technique	hot rolled
Diameter	10-310mm
Length	canbe required to 3-12m
Sizes tolerance	length: +/-100mm,straightless:3mm/m
Application	1) General service industries (petroleum, food, chemical, paper, fertilizer, Fabric, aviation and nuclear) 2) Fluid, gas and oil transport 3) Pressure and heat transmission 4) Construction and ornament 5) Boiler heat exchangers
Advantages of this material	1) High fatigue strength and impact resistance after tempering 2) Good low-temperature impact toughness 3) No obvious temper brittleness
Quality Condition	1): Straightness: 3mm/m (max) 2): Corner Radius: 3(max) 3): The ends will be end cut or gas cut 4): No cracks on the surface
Packing	1): Paint oil on the surface to protect steel bars from rusting. 2): Bundle packing by Iron Strips. 3): Bundle weight is from 2mt to 3 mt. 4): Two or three tags will be attached on each bundle.
MOQ	5 tons for each sizes

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)

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:What are the advantages of using nickel-zinc alloy steel round bars?: There are several advantages to using nickel-zinc alloy steel round bars. Firstly, they offer excellent corrosion resistance, making them ideal for applications in harsh environments or where exposure to moisture is a concern. Secondly, these round bars exhibit high strength and toughness, making them suitable for heavy-duty applications that require a reliable and durable material. Additionally, nickel-zinc alloy steel round bars have good heat resistance, allowing them to withstand elevated temperatures without significant deformation or loss of mechanical properties. Overall, these advantages make nickel-zinc alloy steel round bars a versatile and reliable choice for various industrial and construction applications.

Q:What are the different finishes available for steel round bars?: There are several different finishes available for steel round bars, including hot rolled, cold drawn, turned and polished, and coated finishes.

Q:What are the different safety considerations when working with steel round bars?: When dealing with steel round bars, several safety factors must be taken into consideration. First and foremost, it is imperative to wear suitable personal protective equipment (PPE), such as safety goggles, gloves, and steel-toed boots, to safeguard against potential hazards. One primary safety concern when handling steel round bars is the potential for injury from sharp edges or burrs. If not handled with care, these can lead to cuts or puncture wounds. It is vital to carefully inspect the round bars for any sharp edges or burrs and, if necessary, file them down or use protective coverings. Another crucial aspect to consider is the weight of the steel round bars. Depending on their size and length, they can be quite heavy and may necessitate the use of lifting equipment or assistance from another person to prevent strain or back injuries. It is essential to employ proper lifting techniques and avoid overexertion when moving or transporting the bars. Fire safety is also a concern when working with steel round bars. Since steel can conduct heat and electricity, precautions must be taken to prevent sparks or heat sources from igniting flammable materials in the vicinity. Fire extinguishers should be easily accessible, and the work area should be well-ventilated to minimize the risk of fire or smoke inhalation. Furthermore, when cutting or manipulating steel round bars, there is a potential for flying debris or metal chips. To safeguard the eyes from these hazards, safety goggles or a face shield should be worn. It is also crucial to utilize appropriate cutting tools and techniques to prevent accidents or injuries. Finally, having proper training and knowledge of the equipment and machinery used when working with steel round bars is crucial. This includes comprehending the correct procedures for cutting, bending, or welding the bars, as well as being aware of any specific safety precautions associated with the machinery being used. In conclusion, safety should always be given top priority when working with steel round bars. By adhering to these considerations and taking the necessary precautions, the risk of accidents or injuries can be minimized, thereby ensuring a safe working environment.

Q:What is the corrosion resistance of steel round bars?: The corrosion resistance of steel round bars depends on the specific type of steel used and any additional coatings or treatments that have been applied. Generally, stainless steel round bars have excellent corrosion resistance due to their high levels of chromium and nickel, which form a protective oxide layer on the surface. However, carbon steel round bars are more susceptible to corrosion and may require additional protection such as galvanization or painting to enhance their resistance.

Q:Can steel round bars be used for valve stem applications?: Yes, steel round bars can be used for valve stem applications. Steel round bars are often used in various industrial applications, including valve stems, due to their strength, durability, and resistance to corrosion.

Q:How do you determine the straightness of a steel round bar?: To determine the straightness of a steel round bar, you can use a straightedge or a precision measuring instrument such as a dial indicator. Place the straightedge along the length of the bar and observe if there are any visible gaps or deviations from a straight line. Alternatively, by using a dial indicator, you can measure the amount of deflection or deviation from a straight path at different points along the bar's length.

Q:What are the corrosion resistance properties of steel round bars?: Steel round bars have excellent corrosion resistance properties due to the presence of alloying elements such as chromium, nickel, and molybdenum. These elements form a protective oxide layer on the surface of the steel, preventing the metal from coming into contact with corrosive substances. Additionally, stainless steel round bars are highly resistant to rust and corrosion caused by exposure to moisture, chemicals, and atmospheric conditions, making them suitable for various applications in industries such as construction, marine, and manufacturing.

Q:What are the advantages of using nickel-iron alloy steel round bars?: Nickel-iron alloy steel round bars offer several advantages. Firstly, they exhibit excellent corrosion resistance, making them suitable for applications in harsh environments. Additionally, these bars possess high mechanical strength and toughness, allowing them to withstand heavy loads and impacts. They also have good thermal stability, making them ideal for use in high-temperature applications. Moreover, nickel-iron alloy steel round bars have good magnetic properties, making them suitable for use in electromagnetic applications. Overall, the combination of corrosion resistance, mechanical strength, thermal stability, and magnetic properties make nickel-iron alloy steel round bars advantageous in various industrial applications.

Q:What are the advantages of using heat-treatable steel round bars?: Using heat-treatable steel round bars offers several advantages: 1. Strength Enhancement: Controlled heating and cooling processes can be applied to heat-treatable steel round bars, which enhance their strength and hardness. This renders them suitable for applications demanding high strength and durability. 2. Enhanced Resistance to Wear: Heat treatment enables the development of a hardened surface layer on the steel round bars, significantly improving their wear and abrasion resistance. As a result, they are ideal for use in industries such as manufacturing, construction, and automotive, where components experience heavy wear and tear. 3. Tailored Customization: Heat-treatable steel round bars possess the advantage of easy customization to meet specific requirements. By adjusting the heat treatment process, the bars' hardness, strength, and other mechanical properties can be tailored to suit different applications, ensuring optimal performance. 4. Convenient Machinability: Heat-treatable steel round bars generally exhibit good machinability, allowing for easy cutting, drilling, or shaping into various forms without compromising their structural integrity. This convenience reduces production time and costs. 5. Versatility: Heat-treatable steel round bars find versatile applications across a wide range of industries, including construction, manufacturing, oil and gas, automotive, and aerospace. They are commonly utilized in the production of shafts, gears, bolts, axles, and other critical components. 6. Long-term Cost-effectiveness: Although heat-treatable steel round bars may initially have a higher cost compared to non-heat-treatable or lower-grade steels, their durability and enhanced properties make them cost-effective in the long run. The improved strength and wear resistance contribute to a longer service life, reducing the need for frequent replacements and maintenance. In conclusion, the utilization of heat-treatable steel round bars offers a multitude of benefits, including increased strength, improved wear resistance, customized properties, easy machinability, versatility, and long-term cost-effectiveness. These advantages position them as the preferred choice for demanding applications requiring high-performance materials.

Q:What is the difference between a polished and a cold drawn steel round bar?: A polished steel round bar refers to a steel bar that has undergone a polishing process, which involves using abrasive materials to remove any surface imperfections and create a smooth, shiny finish. Polishing enhances the aesthetic appearance of the steel bar and improves its corrosion resistance. This process is commonly used for decorative or architectural applications where the visual appeal is important. On the other hand, a cold drawn steel round bar is produced through a different manufacturing process. In this method, a steel bar is pulled through a die at room temperature to reduce its diameter and increase its length. This process results in a bar with a more precise and uniform diameter, as well as improved mechanical properties such as higher tensile strength and dimensional accuracy. Cold drawing also enhances the surface finish, but it may not achieve the same level of smoothness and shine as a polished bar. In summary, the main difference between a polished and a cold drawn steel round bar lies in the manufacturing process and the resulting properties. Polishing provides a smooth and shiny finish for aesthetic purposes, while cold drawing improves the dimensional accuracy and mechanical properties of the steel bar.

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