AISI 5140 Alloy Steel Round Bars System 1

AISI 5140 Alloy Steel Round Bars System 2

AISI 5140 Alloy Steel Round Bars System 3

AISI 5140 Alloy Steel Round Bars

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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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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 steel round bar surface finishes for improved aesthetics?: There are several different types of steel round bar surface finishes that can be used to enhance the aesthetic appeal of the material. These finishes are often chosen based on the desired look and feel of the steel, as well as the intended application. Some of the most common surface finishes for steel round bars include: 1. Polished: This finish involves a series of abrasive processes that result in a smooth, reflective surface. It is commonly used in applications that require a high level of visual appeal, such as architectural structures or decorative pieces. 2. Brushed: This finish is achieved by brushing the steel surface with a wire brush or abrasive pad, creating a textured appearance. It provides a more subdued and contemporary look, and is often used in modern architectural designs or furniture. 3. Satin: This finish is similar to brushed, but with a finer texture. It creates a smooth and matte appearance, making it a popular choice for applications that require a sophisticated and elegant look, such as luxury fixtures or appliances. 4. Hammered: This finish involves creating a series of small dents or dimples on the surface of the steel, giving it a textured and rustic appearance. It is commonly used in applications that require a unique and artistic look, such as handrails or decorative accents. 5. Etched: This finish is achieved by chemically treating the steel surface to create a pattern or design. It allows for intricate and detailed designs, making it a popular choice for applications that require personalized or branded elements, such as signage or logos. 6. Powder-coated: This finish involves applying a layer of powdered paint to the steel surface and then baking it to create a durable and vibrant coating. It provides a wide range of color options and is often used in applications that require a decorative and long-lasting finish, such as outdoor furniture or architectural elements. Overall, the choice of steel round bar surface finish depends on the desired aesthetic outcome and the specific requirements of the application. Different finishes can enhance the visual appeal of the steel, making it suitable for various industries and design purposes.

Q: Can steel round bars be bent or formed?: Yes, steel round bars can be bent or formed. The ability of steel round bars to be bent or formed depends on various factors such as the type of steel, the diameter and thickness of the bar, and the method used for bending or forming. Steel round bars can be bent or formed using different techniques, including hot bending, cold bending, and mechanical bending. Hot bending involves heating the steel round bar to a specific temperature and then bending it into the desired shape. Cold bending, on the other hand, does not require heating and can be done using hydraulic or manual bending machines. Mechanical bending involves the use of specialized machinery to apply force and bend the steel round bar. However, it is important to note that excessive bending or forming can weaken the steel round bar and affect its structural integrity. Therefore, it is crucial to follow proper bending and forming techniques and consider the limitations and specifications provided by the manufacturer or industry standards.

Q: Can steel round bars be used in the chemical industry?: Yes, steel round bars can be used in the chemical industry. Steel is a versatile material with excellent mechanical properties and corrosion resistance, making it suitable for various applications in the chemical industry. Steel round bars are commonly used for manufacturing equipment, such as reactors, tanks, and piping systems, where strength, durability, and resistance to chemical substances are important factors.

Q: What are the different heat treatment methods for steel round bars?: Steel round bars can undergo various heat treatment methods to enhance their mechanical properties and overall performance. These methods, namely annealing, normalizing, quenching, tempering, and case hardening, are commonly employed. 1. Annealing: By subjecting the steel round bars to a specific temperature and maintaining it for a certain duration, annealing achieves a uniform microstructure. This treatment alleviates internal stresses, improves ductility, and enhances machinability. 2. Normalizing: This technique involves heating the steel round bars slightly above their critical transformation temperature and subsequently cooling them in still air. Normalizing refines the grain structure, enhances mechanical properties, and improves resistance to impact and fatigue. 3. Quenching: The process of quenching entails heating the steel round bars above their critical temperature and rapidly cooling them by immersion in a quenching medium like oil, water, or brine. This rapid cooling hardens the steel, rendering it stronger and more resistant to wear and abrasion. However, quenched steel may exhibit brittleness, necessitating additional heat treatment steps. 4. Tempering: Following the quenching process, tempering is often employed to reduce brittleness and enhance toughness. Tempering involves reheating the quenched steel to a specific temperature and holding it there for a designated time, followed by gradual cooling. This procedure alleviates internal stresses, improves ductility, and enhances overall toughness and machinability. 5. Case Hardening: Case hardening is a surface heat treatment method that increases the hardness of the outer layer of steel round bars while maintaining a relatively softer core. This technique involves heating the steel in a carbon-rich environment, such as a gas or salt bath, and subsequently quenching it to achieve a hardened outer layer. Case hardening improves wear resistance and fatigue strength, making it suitable for applications requiring high surface hardness. It is crucial to note that the selection of the specific heat treatment method for steel round bars depends on the desired mechanical properties and intended application. Manufacturers meticulously choose the appropriate heat treatment method based on factors such as steel composition, desired hardness, and required strength.

Q: What are the different types of carbon steel round bars?: There are several different types of carbon steel round bars available on the market. Some of the commonly used types include: 1. Mild Steel Round Bars: These are the most common type of carbon steel round bars. They have a low carbon content and are easy to weld, cut, and form. Mild steel round bars are suitable for general engineering purposes and have excellent machinability. 2. Medium Carbon Steel Round Bars: These round bars have a higher carbon content than mild steel round bars. They offer better strength and hardness, making them suitable for applications that require higher load-bearing capacity. Medium carbon steel round bars are commonly used in automotive, construction, and machinery industries. 3. High Carbon Steel Round Bars: These round bars have a higher carbon content, typically above 0.60%. They offer superior strength, hardness, and wear resistance. High carbon steel round bars are commonly used in applications that require high strength, such as springs, cutting tools, and axles. 4. Free Cutting Steel Round Bars: These round bars have added elements, such as sulfur or lead, to improve machinability. They are commonly used in applications where easy machining is required, such as in the production of bolts, screws, and fittings. 5. Alloy Steel Round Bars: These round bars contain additional alloying elements, such as chromium, nickel, or molybdenum, to enhance specific properties. Alloy steel round bars offer improved strength, hardness, corrosion resistance, and heat resistance. They are commonly used in applications that require high performance, such as in the aerospace, oil and gas, and automotive industries. It is important to consider the specific requirements of your project or application when selecting the type of carbon steel round bar to ensure optimal performance and durability.

Q: Can steel round bars be used in the manufacturing of pumps?: Yes, steel round bars can be used in the manufacturing of pumps. Steel round bars are often used as the primary material for making pump shafts, impellers, and other critical components due to their high strength, durability, and resistance to corrosion. Their uniform shape and consistent mechanical properties make them suitable for creating precise and reliable pump parts.

Q: What is the maximum manganese content allowed for steel round bars?: The maximum manganese content allowed for steel round bars typically varies depending on the specific grade or specification of the steel. However, in general, most steel round bars have a maximum manganese content of around 1-1.5%.

Q: What are the typical price ranges for steel round bars?: The price of steel round bars can differ depending on multiple factors, such as the steel type, diameter, length, and quantity purchased. Generally, common carbon steel grades can be priced between $1 and $5 per foot. However, specialty and high-grade steel round bars can have higher prices, ranging from $5 to $20 per foot or more. Moreover, larger diameter or longer length steel round bars may also be more expensive due to increased material and manufacturing costs. It is important to note that these price ranges are approximate and can vary depending on market conditions, supplier pricing, and other factors. To obtain an accurate price range, it is advisable to contact steel suppliers or distributors for specific quotes based on your requirements.

Q: Can steel round bars be used in high-pressure applications?: Yes, steel round bars can be used in high-pressure applications. Steel round bars are known for their strength and durability, making them suitable for various industrial and mechanical applications. They have the ability to withstand high pressure and provide structural stability, making them a popular choice in industries such as oil and gas, construction, and manufacturing. However, it is important to choose the right grade and quality of steel round bars to ensure they can withstand the specific pressure requirements of the application.

Q: How do steel round bars compare to glass round bars?: Steel round bars are significantly stronger and more durable compared to glass round bars. Steel is a metallic material that offers high tensile strength and can withstand heavy loads, making it suitable for structural applications. On the other hand, glass round bars are more fragile and prone to breakage under stress. However, glass round bars have a more aesthetic appeal and are commonly used in decorative applications. The choice between steel and glass round bars depends on the specific requirements of the project, with steel being preferred for strength and glass for its visual qualities.

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