35CrMo AISI 4135 Forged Round Bars 34CrMo4

35CrMo AISI 4135 Forged Round Bars 34CrMo4 System 1

35CrMo AISI 4135 Forged Round Bars 34CrMo4 System 2

35CrMo AISI 4135 Forged Round Bars 34CrMo4 System 3

35CrMo AISI 4135 Forged Round Bars 34CrMo4 System 4

35CrMo AISI 4135 Forged Round Bars 34CrMo4

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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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Grade	C	Si	Mn	Cr	Mo
35CrMo	0.32/0.40	0.17/0.37	0.40/0.70	0.80/1.10	0.15/0.25

Material	Hot forged steel round bar
Diameter	80mm-1200mm
Length	steel round bar:2000mm-12000mm Straightness: 3mm/M max; square bar:100-1000mm, blocks sizes up to 800*1000mm
Process	EAF + LF + VD +(ESR) + Forged + Heat Treatment (optional)
Delivery condition	Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)
Delivery Time	30 days
MOQ	20 tons
Heat treatment	Normalized / Annealed / Quenched / tempered
Forged ratio	no less than 3:1
Technical Data	According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing; SCM440 steel round bar available for test
Test	Ultrasonic test according to SEP 1921-84 G3 C/c
Certificate of Quality	issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality
Marking	Grade, heat NO. length will be stamped one each bar with required color
Payment	30% advance by T\T, balance pay before shipment Irrevocable LC at sight
Application	Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.

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 different safety considerations when working with steel round bars?: When working with steel round bars, there are several safety considerations to keep in mind. First and foremost, it is important to wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and steel-toed boots to protect against potential hazards. Additionally, one should always handle the steel bars with care to avoid injuries from sharp edges or heavy lifting. It is crucial to ensure a secure and stable work area to prevent slips, trips, and falls. Furthermore, when using tools or machinery to cut or shape the steel bars, proper training and caution should be exercised to prevent accidents and follow all recommended safety procedures.

Q:How do I determine the strength and hardness of a steel round bar?: To determine the strength and hardness of a steel round bar, there are a few techniques and tests that can be used: 1. Tensile Test: This is the most common method for determining the strength of a steel bar. It involves applying a tensile force to the bar until it breaks, and measuring the maximum force or load it can withstand. This test provides information about the bar's ultimate tensile strength, yield strength, and elongation. 2. Hardness Test: There are several methods to measure the hardness of a steel bar, including the Rockwell, Brinell, and Vickers hardness tests. These tests involve indenting the surface of the bar with a standardized indenter and measuring the resulting indentation size. The hardness value obtained provides an indication of the bar's resistance to deformation and wear. 3. Charpy Impact Test: This test measures the toughness of a steel bar by striking it with a swinging pendulum and measuring the energy absorbed during fracture. It helps determine the ability of the bar to resist brittle fracture under impact loading conditions. 4. Microstructural Analysis: A microscopic examination of the steel bar's microstructure can provide insights into its mechanical properties. By preparing a polished and etched sample and examining it under a microscope, the presence of different phases, grain size, and any structural abnormalities can be observed. Different microstructural features can influence the strength and hardness of the bar. 5. Chemical Composition Analysis: The chemical composition of the steel bar, particularly the carbon content, plays a significant role in determining its strength and hardness. Analyzing the composition using techniques like spectroscopy or chemical analysis can provide valuable information about the bar's mechanical properties. It is important to note that these tests and techniques should be conducted by qualified professionals in a controlled laboratory environment to ensure accurate and reliable results. Additionally, specific standards and specifications may exist for different applications, so consulting relevant standards and guidelines can provide further guidance on determining the strength and hardness of a steel round bar.

Q:What is the difference between a hot rolled and a precision ground steel round bar?: A hot rolled steel round bar and a precision ground steel round bar differ primarily in their manufacturing processes and resulting surface finish. Hot rolled steel round bars are produced by heating the steel billet or ingot to high temperatures and then passing it through a series of rollers to achieve the desired shape and size. This process results in a rougher surface finish with visible mill-scale or oxide layers. The hot rolling process also allows for variations in size and shape, making it a more cost-effective option for producing steel round bars in large quantities. On the other hand, precision ground steel round bars undergo a more refined and controlled manufacturing process. After the initial hot rolling, the bar is then ground to achieve a smooth and consistent surface finish. Precision grinding removes the mill-scale and oxide layers, resulting in a more polished appearance. This process also ensures a tight dimensional tolerance and improved straightness of the round bar. The choice between a hot rolled and a precision ground steel round bar depends on the specific application requirements. Hot rolled round bars are typically used in applications where surface finish is not critical, such as structural components, machinery parts, or construction materials. Precision ground steel round bars, on the other hand, are utilized in applications where a smooth surface finish, precise dimensions, and tight tolerances are necessary, such as in the manufacturing of precision tools, machinery components, or in industries like aerospace or automotive. In summary, the main difference between a hot rolled and a precision ground steel round bar lies in their manufacturing processes and resulting surface finish. Hot rolled round bars offer cost-effectiveness and versatility, while precision ground round bars provide a smoother surface finish, tighter tolerances, and improved dimensional accuracy for more demanding applications.

Q:What are the advantages of using vanadium-alloy steel round bars?: Vanadium-alloy steel round bars offer numerous benefits. Firstly, they possess significantly enhanced strength and toughness compared to regular steel, making them ideal for applications requiring durability and high strength, such as construction, manufacturing, and engineering projects. The inclusion of vanadium improves the steel's ability to withstand heavy loads, impacts, and extreme temperatures, enabling it to thrive in demanding environments. Secondly, vanadium-alloy steel round bars display exceptional resistance to corrosion. The vanadium creates a protective oxide layer on the steel's surface, preventing rusting and corrosion. Consequently, these bars have impressive longevity, even in harsh or corrosive surroundings. Moreover, vanadium-alloy steel exhibits excellent weldability and machinability. It can be effortlessly welded, facilitating efficient fabrication and construction processes. Additionally, its machinability allows for precise shaping and forming, making it adaptable to various design requirements. Furthermore, vanadium-alloy steel excels in wear resistance. This quality is particularly advantageous in applications where the bars face high levels of friction, abrasion, or wear, such as mining or manufacturing equipment. The addition of vanadium enhances the steel's hardness and wear resistance, thereby extending the lifespan of the bars and reducing maintenance costs. Lastly, vanadium-alloy steel demonstrates exceptional heat resistance. It can endure high temperatures without compromising its strength or structural integrity. Consequently, it is suitable for applications involving exposure to extreme heat, such as automotive engines, turbines, or power generation equipment. In conclusion, the utilization of vanadium-alloy steel round bars provides a range of advantages, including increased strength and toughness, corrosion resistance, ease of welding and machining, impressive wear resistance, and high heat resistance. These qualities establish vanadium-alloy steel round bars as a dependable and versatile choice for various applications.

Q:What are the advantages of using nickel-chromium-cobalt alloy steel round bars?: One advantage of using nickel-chromium-cobalt alloy steel round bars is their high strength and durability. This alloy steel has excellent resistance to corrosion, oxidation, and high temperatures, making it suitable for various applications in industries such as aerospace, automotive, and oil and gas. Additionally, the alloy's ability to maintain its mechanical properties at elevated temperatures makes it ideal for use in high-temperature environments. Its unique combination of properties allows for enhanced performance and extended lifespan of the round bars, making them a preferred choice for demanding applications.

Q:What are the advantages of using nickel-silicon alloy steel round bars?: Nickel-silicon alloy steel round bars offer numerous benefits. Firstly, they possess outstanding strength at high temperatures and are resistant to oxidation and corrosion. Consequently, they are well-suited for applications in extreme environments, such as the aerospace and automotive industries. Secondly, these round bars exhibit superior mechanical properties, including high tensile and yield strength. As a result, they are ideal for use in structural components that require durability and strength, like construction and engineering projects. Additionally, nickel-silicon alloy steel round bars demonstrate excellent resistance to fatigue and wear. Therefore, they are perfect for applications involving repetitive stress or abrasive conditions. This ensures extended lifespan and reduced maintenance requirements for components made from this material. Furthermore, nickel-silicon alloy steel is renowned for its exceptional magnetic properties, making it suitable for electromagnetic applications such as transformers, motors, and generators. Lastly, nickel-silicon alloy steel round bars can be easily machined and fabricated, allowing for greater design flexibility and ease of manufacturing. Consequently, they are a cost-effective choice for various industries, as they lower production costs and lead times. In summary, the advantages of nickel-silicon alloy steel round bars include resistance to high temperatures, excellent mechanical properties, fatigue and wear resistance, superior magnetic properties, and ease of machining and fabrication.

Q:Can steel round bars be used in the agriculture industry?: Yes, steel round bars can be used in the agriculture industry. They are commonly used for applications such as building fences, constructing equipment, and supporting structures for agricultural buildings. Steel round bars offer durability, strength, and versatility, making them suitable for various agricultural applications.

Q:What is the maximum chromium content allowed for steel round bars?: The allowable chromium content in steel round bars is determined by the grade or specification of the steel. Typically, the chromium content in these bars can span from 0.15% to 30%, although this range may vary depending on the desired properties and intended application of the steel. Stainless steel grades often exhibit higher chromium content as they are renowned for their resistance to corrosion. To ascertain the maximum allowable chromium content for particular steel round bars, it is crucial to refer to the pertinent industry standards or specifications.

Q:What are the advantages of using zinc-alloy steel round bars?: One of the advantages of using zinc-alloy steel round bars is their high corrosion resistance. The zinc coating acts as a protective barrier, preventing rust and corrosion, which makes these bars suitable for outdoor applications and environments with high humidity. Additionally, zinc-alloy steel round bars have excellent strength and durability, making them ideal for structural and load-bearing purposes. Furthermore, the zinc coating provides enhanced aesthetics, offering a polished and visually appealing finish. Overall, the advantages of using zinc-alloy steel round bars include corrosion resistance, strength, durability, and improved appearance.

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