Carbon Alloy Steel Round Bars AISI 4140 System 1

Carbon Alloy Steel Round Bars AISI 4140 System 2

Carbon Alloy Steel Round Bars AISI 4140 System 3

Carbon Alloy Steel Round Bars AISI 4140 System 4

Carbon Alloy Steel Round Bars AISI 4140

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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	0.38-0.43 %	Tensile strength(MPA)	≥1080(110)
Si	0.15-0.35%	Yield strength (MPA)	≥930(95)
Mn	0.75-1.00 %	Elongation (δ5/%)	≥12
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.030 %	Impact (J)	≥ 63
P	≤0.030 %	Impact toughness value αkv (J/cm2)	≥78(8)
S	≤0.040 %	Hardness	≤217HB
Cu	≤0.030 %
Mo	0.15-0.25 %

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 welding techniques for steel round bars?: There are several different welding techniques that can be used for steel round bars, including shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and flux-cored arc welding (FCAW). Each technique has its own advantages and disadvantages, depending on factors such as the thickness of the steel, the desired weld strength, and the specific application.

Q: Can steel round bars be used in the production of couplings?: Indeed, couplings can be produced using steel round bars. These bars are widely employed across various industrial sectors owing to their robustness, endurance, and versatility. In terms of coupling manufacturing, steel round bars furnish the essential structural integrity and dependability demanded by such components. They can be manipulated, forged, or molded to conform to specific coupling designs and specifications. Additionally, steel round bars boast exceptional resistance against corrosion, a pivotal factor in ensuring the longevity and operational efficacy of couplings in diverse settings. All in all, steel round bars serve as an appropriate material selection for coupling production, guaranteeing the requisite strength and durability necessary for seamless and trustworthy coupling operations.

Q: What are the environmental considerations of steel round bars?: Steel round bars have several environmental considerations. Firstly, the production of steel requires a significant amount of energy, which often comes from non-renewable sources, leading to greenhouse gas emissions and contributing to climate change. Additionally, the extraction and processing of raw materials for steel production, such as iron ore and coal, can have detrimental effects on local ecosystems and habitats. Furthermore, the transportation of steel round bars can result in carbon emissions if not done efficiently. However, steel is a highly recyclable material, and the use of recycled steel in the production of round bars can help reduce environmental impact. Additionally, the durability and strength of steel make it a long-lasting material, leading to less waste in the long run.

Q: What are the different grades of stainless steel round bars?: Stainless steel round bars are available in various grades, each offering unique properties and characteristics. The most common grades of stainless steel round bars include: 1. Grade 304: This is the most widely used grade of stainless steel round bars. It offers good corrosion resistance, high durability, and excellent formability. Grade 304 is suitable for a wide range of applications, including food processing equipment, kitchen appliances, and architectural components. 2. Grade 316: Known for its superior corrosion resistance, grade 316 stainless steel round bars are often used in marine environments or industries where exposure to corrosive substances is common. It also offers excellent resistance to high temperatures, making it suitable for heat exchangers and chemical processing equipment. 3. Grade 410: This stainless steel grade is known for its high strength and hardness. Grade 410 round bars are often used in applications where resistance to corrosion and moderate heat is required, such as cutlery, pump shafts, and valve parts. 4. Grade 420: With increased carbon content, grade 420 stainless steel round bars offer higher strength and hardness compared to grade 410. It is commonly used in the production of surgical instruments, dental tools, and blades. 5. Grade 430: This grade of stainless steel round bars is known for its good corrosion resistance and formability. It is often used in applications involving decorative trim, automotive components, and kitchen appliances. These are just a few examples of the different grades of stainless steel round bars. It is important to choose the appropriate grade based on the specific requirements of your application to ensure optimal performance and longevity.

Q: What is the maximum temperature steel round bars can withstand?: The maximum temperature that steel round bars can withstand varies depending on the specific grade of steel. However, in general, most steel round bars can withstand temperatures up to around 1000 to 1200 degrees Celsius (1832 to 2192 degrees Fahrenheit) without significant loss of structural integrity. It is important to note that prolonged exposure to high temperatures can lead to a reduction in the strength and hardness of the steel, as well as potential dimensional changes and distortion. Additionally, the specific properties and behavior of steel at high temperatures can also be influenced by factors such as alloy composition, heat treatment, and the presence of other elements or impurities. For applications requiring steel round bars to withstand extremely high temperatures beyond the typical range, specialized high-temperature steels, such as heat-resistant or creep-resistant alloys, may be used. These alloys are specifically designed to maintain their mechanical properties and structural integrity at elevated temperatures, often up to several thousand degrees Celsius.

Q: How do you determine the strength of a steel round bar?: The strength of a steel round bar can be determined through various methods, but the most common approach is by conducting a tensile test. This test involves applying a controlled force to the bar until it fractures, allowing for the measurement of its ultimate tensile strength (UTS). Other important parameters, such as yield strength, elongation, and reduction in area, can also be determined from the test results. Additionally, the chemical composition and microstructure of the steel can provide valuable insights into its overall strength and performance characteristics.

Q: What is the maximum elongation of steel round bars?: The maximum elongation of steel round bars depends on various factors such as the type of steel, its composition, and the manufacturing process. However, in general, steel round bars can have elongation values ranging from 10% to 30% before they reach their maximum limit and start to deform permanently.

Q: What are the different types of steel round bars used in the manufacturing of springs?: There are several different types of steel round bars commonly used in the manufacturing of springs. These include: 1. Carbon steel round bars: These are the most commonly used type of steel for springs. They have a high carbon content, typically ranging from 0.60% to 0.95%. Carbon steel round bars offer good strength and durability, making them suitable for a wide range of spring applications. 2. Alloy steel round bars: These are made by adding alloying elements such as chromium, manganese, nickel, or vanadium to carbon steel. Alloy steel round bars provide enhanced mechanical properties, including higher strength, toughness, and resistance to wear and corrosion. They are often used in heavy-duty or high-performance spring applications. 3. Stainless steel round bars: These are corrosion-resistant steel bars with a high chromium content (usually above 10.5%). Stainless steel round bars are popular for springs that require excellent resistance to rust, oxidation, and chemicals. They are commonly used in applications where hygiene, cleanliness, and aesthetic appeal are important, such as in the food and medical industries. 4. Spring steel round bars: These are specifically designed for spring manufacturing. They have a unique combination of properties, including high yield strength, good fatigue resistance, and excellent elasticity. Spring steel round bars are typically made from either carbon steel or alloy steel, depending on the specific requirements of the application. It is important to choose the right type of steel round bar based on factors such as the intended application, load requirements, environmental conditions, and desired spring performance. Consulting with a materials engineer or spring manufacturer can help determine the most suitable steel round bar for a specific spring manufacturing project.

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 commonly used in various industries for their strength, durability, and versatility. In pump manufacturing, steel round bars are often used as shafts or rotors due to their ability to withstand high pressure and rotational forces. The steel round bars can be machined, forged, or heat-treated to meet the specific requirements of the pump design. Additionally, steel round bars provide excellent corrosion resistance, making them suitable for pumps used in various environments. Overall, steel round bars are a reliable and commonly used material in pump manufacturing.

Q: Why do I use the M25 round bar for the embedded bolt M24?: The problem is that the reinforcement of this 36 is not ordinary steel. This steel bar is called general round bar, and its diameter is 36.2MM. Its concentricity is very high, it is a kind of reinforcing steel that is specially designed for bolt

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