ASTM 5140 Alloy Steel Round Bar System 1

ASTM 5140 Alloy Steel Round Bar System 2

ASTM 5140 Alloy Steel Round Bar System 3

ASTM 5140 Alloy Steel Round Bar System 4

ASTM 5140 Alloy Steel Round Bar

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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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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.37-0.44 %	Tensile strength(MPA)	≥980(100)
Si	0.17-0.37 %	Yield strength (MPA)	≥785(80)
Mn	0.50-0.80 %	Elongation (δ5/%)	≥9
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.30 %	Impact (J)	≥ 47
P	≤0.035 %	Impact toughness value αkv (J/cm2)	≥59(6)
S	≤0.035 %	Hardness	≤207HB
Cu	≤0.030 %

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 types of connections used with steel round bars?: There are several types of connections commonly used with steel round bars, including threaded connections, welded connections, and mechanical connections such as couplers or splice sleeves. These connections are used to join steel round bars together in various applications, providing strength and stability to the overall structure.

Q: Can steel round bars be used for pump shaft applications?: Yes, steel round bars can be used for pump shaft applications. Steel round bars are commonly used for pump shafts due to their excellent strength, durability, and resistance to corrosion. Pump shafts are subjected to high torsional loads and need to withstand the stresses of rotating machinery. Steel round bars offer the necessary mechanical properties to handle these conditions, making them a suitable choice for pump shaft applications. Additionally, the versatility of steel allows for various heat treatments and surface finishes to further enhance its performance and longevity in pump shafts.

Q: What are the advantages of using chromium-vanadium alloy steel round bars?: Using chromium-vanadium alloy steel round bars has several advantages: 1. Exceptional Strength and Hardness: Chromium-vanadium alloy steel is renowned for its high strength and hardness. It possesses a strong tensile strength, making it ideal for heavy-duty applications and resistance against wear and tear. 2. Enhanced Durability: The incorporation of chromium and vanadium elements improves the durability of the alloy steel round bars. It offers excellent resistance to corrosion, oxidation, and high temperatures, making it perfect for harsh environments. 3. Versatility in Applications: Chromium-vanadium alloy steel round bars provide versatility in various applications. They are suitable for manufacturing tools, springs, gears, and other components requiring strength and durability. This alloy steel's versatility makes it highly favored in industries like automotive, aerospace, and construction. 4. Convenient Machinability: Chromium-vanadium alloy steel is relatively easy to machine and work with, offering convenience to manufacturers. It can be easily shaped, cut, and formed into desired sizes and shapes without compromising its mechanical properties. 5. Cost-Effective Option: Despite its exceptional properties, chromium-vanadium alloy steel round bars tend to be cost-effective when compared to other high-performance alloys. Hence, it is a popular choice for industries that require strong and durable materials within their budget. 6. Exceptional Fatigue Resistance: Chromium-vanadium alloy steel demonstrates exceptional fatigue resistance, making it suitable for applications involving repetitive stress or cyclic loading. It can withstand repeated use and maintain its structural integrity over an extended period. In conclusion, chromium-vanadium alloy steel round bars offer a combination of high strength, enhanced durability, versatility, and cost-effectiveness. These advantages make it the preferred material choice for various industrial applications where reliability and performance are of utmost importance.

Q: Can steel round bars be used in the manufacturing of heat exchangers?: Yes, steel round bars can be used in the manufacturing of heat exchangers. Steel round bars are commonly used as a material for heat exchanger tubes due to their high strength, durability, and excellent heat transfer properties. The bars can be formed and welded into various shapes and sizes, making them suitable for constructing the heat exchanger tubes.

Q: What are the advantages of using chromium-alloy steel round bars?: There are several advantages to using chromium-alloy steel round bars. Firstly, the presence of chromium in the alloy significantly enhances the corrosion resistance of the steel, making it ideal for applications in harsh environments or exposed to corrosive substances. Additionally, chromium-alloy steel round bars offer excellent strength and hardness, making them suitable for heavy-duty applications that require high load-bearing capacity. The inclusion of chromium also improves the steel's heat resistance, allowing it to withstand high temperatures without losing its structural integrity. Lastly, chromium-alloy steel round bars are known for their excellent wear resistance, making them a reliable choice for industries such as automotive, construction, and manufacturing.

Q: What is the difference between a turned and a ground steel round bar?: Two distinct types of steel bars, a turned steel round bar and a ground steel round bar, have undergone different manufacturing procedures. To create a turned steel round bar, a cylindrical steel rod is rotated against a cutting tool, which eliminates material from the bar's surface to achieve the desired dimensions and finish. This process enhances the bar's dimensional accuracy and smoothness. Turned steel round bars find common usage in precision machining or automotive components that necessitate tight tolerances and a smooth surface finish. Conversely, a ground steel round bar is manufactured by passing a turned steel round bar through a grinding machine. This machine uses an abrasive wheel to eliminate any surface imperfections or irregularities from the bar. The grinding process ensures that the bar maintains a consistent diameter and a smooth, polished surface. Ground steel round bars often find application in aerospace components or hydraulic cylinders that demand a high level of precision and surface finish. In conclusion, the primary distinction between a turned and a ground steel round bar lies in the manufacturing processes they undergo. While turned bars are created by cutting material from the surface, ground bars are refined by grinding to achieve superior dimensional accuracy and surface smoothness. The selection between turned and ground steel round bars is contingent upon the specific requirements of the application and the desired level of precision and surface finish.

Q: What are the advantages of using boron-alloy steel round bars?: Using boron-alloy steel round bars in various applications offers several advantages. Firstly, compared to traditional carbon steel, boron-alloy steel has significantly higher strength. This increased strength enables the construction of lightweight and durable structures, reducing material costs and improving overall efficiency. Additionally, boron-alloy steel round bars exhibit excellent hardenability. This means they can be heat-treated to achieve desired properties such as increased hardness and wear resistance. This makes them ideal for demanding applications in industries like automotive and construction, where high strength and durability are necessary. Another advantage of boron-alloy steel round bars is their enhanced weldability. They can be easily welded without sacrificing their mechanical properties, allowing for seamless integration into various fabrication processes. This saves time and effort during assembly and ensures the structural integrity of the final product. Furthermore, boron-alloy steel round bars offer excellent resistance to abrasion and corrosion. This makes them suitable for use in harsh environments or applications where exposure to chemicals or moisture is common. The extended lifespan of the material reduces the need for frequent repairs or replacements, resulting in cost savings and improved productivity. Lastly, boron-alloy steel round bars are readily available and cost-effective compared to other high-strength steel alternatives. Their wide availability makes them a viable option for a range of applications, from manufacturing machinery to constructing infrastructure. In summary, the benefits of using boron-alloy steel round bars include higher strength and durability, improved hardenability, enhanced weldability, resistance to abrasion and corrosion, and cost-effectiveness. These advantages make them an excellent choice for various industries that require lightweight, strong, and long-lasting materials.

Q: Can steel round bars be used for making heat exchangers?: Yes, steel round bars can be used for making heat exchangers. Steel is a commonly used material for heat exchangers due to its good thermal conductivity, strength, and resistance to corrosion. Round bars can be machined and formed into the desired shape for the heat exchanger, providing structural integrity and efficient heat transfer.

Q: What is the yield strength to tensile strength ratio of a steel round bar?: The yield strength to tensile strength ratio of a steel round bar is typically around 0.85.

Q: Can steel round bars be heat treated for improved strength?: Yes, steel round bars can be heat treated to improve their strength. Heat treatment involves heating the steel to a specific temperature and then cooling it rapidly or slowly, depending on the desired outcome. This process can alter the microstructure of the steel, resulting in increased hardness, tensile strength, and other mechanical properties.

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