Alloy Steel AISI 4340 Materials 1.6582 System 1

Alloy Steel AISI 4340 Materials 1.6582 System 2

Alloy Steel AISI 4340 Materials 1.6582 System 3

Alloy Steel AISI 4340 Materials 1.6582 System 4

Alloy Steel AISI 4340 Materials 1.6582

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 10000 m.t./month

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GB	ASTM	JIS	ISO
40CrNiMoA	4340	SNCM439	36CrNiMo4

Standard	Grade	C	Cr	Ni	Mo	Si	Mn	P	S	Cu
≤
GB	5CrNiMo	0.37-0.44	0.60-0.90	1.25-1.35	0.15-0.25	0.17-0.37	0.50-0.80	0.025	0.025	0.30
JIS	SNCM439	0.36-0.43	0.60-1.00	1.60-2.00	0.15-0.30	0.15-0.35	0.60-0.90	0.030	0.020	0.30
ASTM	4340	0.38-0.43	0.70-0.90	1.65-2.00	0.20-0.30	0.15-0.35	0.65-0.85	0.025	0.025	—
ISO	38CrNiMo4	0.32-0.40	0.90-1.20	0.90-1.20	0.15-0.30	0.10-0.40	0.50-0.80	0.035	0.035	—

Tensile strength	Yield strength	Elongation rate	Contractibility rate	Impact Energy	Hardness(HBS100/3000)
≥980MPa	≥835MPa	≥12%	≥55%	≥78J	≤269

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 welding techniques for steel round bars?: Steel round bars can be welded using various techniques. Here are some commonly used ones: 1. Stick welding, also known as Shielded Metal Arc Welding (SMAW): This technique involves using an electrode coated in flux to create an electric arc between the electrode and the workpiece. The base metal melts, resulting in a weld. 2. Gas Metal Arc Welding (GMAW), commonly referred to as MIG (Metal Inert Gas) welding: In this technique, a wire electrode is fed through a welding gun. It combines with a shielding gas to create a weld. 3. Flux-Cored Arc Welding (FCAW): Similar to GMAW, FCAW uses a continuously fed electrode. However, instead of a solid wire electrode, it uses a tubular electrode filled with flux. This flux protects the weld and adds strength. 4. Tungsten Inert Gas (TIG) welding, also known as Gas Tungsten Arc Welding (GTAW): This precise technique involves using a non-consumable tungsten electrode to create an arc. Additional material may be added using a filler rod. 5. Submerged Arc Welding (SAW): This technique is suitable for heavy-duty applications, such as welding steel round bars for structural purposes. The arc and welding zone are submerged in granular flux, providing protection and deep penetration. Each technique has its advantages and is suitable for specific applications. Factors like round bar thickness, required weld strength, and accessibility of the welding site should be considered when selecting the appropriate technique for a strong and durable weld on steel round bars.

Q: What are the different surface hardness options for steel round bars?: Steel round bars can have varying levels of surface hardness depending on the specific requirements and applications. Some of the different surface hardness options for steel round bars include: 1. Soft or annealed: This is the lowest level of surface hardness, where the steel is heated and then slowly cooled to reduce internal stress and increase ductility. Soft or annealed steel is easier to machine and form but has lower strength and wear resistance. 2. Normalized: Normalizing involves heating the steel to a specified temperature and then cooling it in air. This process refines the grain structure and improves the mechanical properties of the steel, resulting in increased hardness compared to annealed steel. 3. Quenched and tempered: This is a heat treatment process that involves heating the steel to a high temperature and then rapidly cooling it in a quenching medium like oil or water. The rapid cooling hardens the surface of the steel, while the subsequent tempering process reduces internal stresses and increases toughness. Quenched and tempered steel round bars have high hardness and strength, making them suitable for applications that require resistance to wear and impact. 4. Induction hardened: Induction hardening is a surface hardening process that involves heating only the surface of the steel round bar using an induction coil. This localized heating is followed by rapid quenching, resulting in a hardened surface layer with increased wear resistance. The core of the steel remains unaffected, retaining its toughness. 5. Case hardened: Case hardening, also known as carburizing, involves introducing carbon into the surface layer of the steel round bar. This is typically done by exposing the steel to a carbon-rich gas or by heating it with a carbon-containing material. The carbon diffuses into the surface and increases the hardness, while the core remains relatively softer. Case hardened steel round bars have a tough core with a wear-resistant surface. These are just a few of the different surface hardness options available for steel round bars. The choice of hardness will depend on the specific application requirements, such as strength, wear resistance, and toughness needed for the intended use.

Q: Are steel round bars suitable for food processing applications?: Steel round bars are commonly used in food processing applications due to their many desirable properties. Firstly, steel is highly durable and can withstand heavy usage and frequent cleaning in food processing environments. This makes it an ideal choice for equipment such as conveyor belts, mixers, and cutting tools. Additionally, steel round bars are resistant to corrosion, which is crucial in food processing applications where exposure to moisture and various chemicals is common. This resistance ensures that the equipment remains hygienic and safe for food production. Furthermore, steel round bars can be easily machined and fabricated into different shapes and sizes, making them versatile for various food processing needs. They can be used to create custom equipment or parts that meet specific requirements, ensuring efficient and effective food processing operations. Lastly, steel is a cost-effective material for food processing applications. It offers excellent value for money, as it provides long-lasting performance, requires minimal maintenance, and can be readily available in the market. However, it is important to note that not all steel round bars are suitable for food processing applications. Stainless steel is the most commonly used type of steel in this industry due to its enhanced corrosion resistance and hygienic properties. Therefore, when choosing steel round bars for food processing applications, it is crucial to ensure that they meet the necessary standards and regulations for food safety.

Q: Are steel round bars prone to deformation?: Steel round bars are generally not prone to deformation when they are properly manufactured and used within their intended limits. Steel is known for its high tensile strength and durability, making it resistant to bending or warping under normal circumstances. However, it is important to note that excessive force or improper handling can still cause deformation in steel round bars. Overloading, incorrect storage conditions, or inappropriate machining techniques can all contribute to bending or twisting of the bars. Therefore, it is crucial to follow recommended guidelines and industry standards to ensure the integrity and longevity of steel round bars.

Q: Can steel round bars be forged?: Indeed, it is possible to forge steel round bars. The act of forging entails subjecting the steel to elevated temperatures and subsequently molding it by exerting pressure using either a forging hammer or press. In the realm of forging procedures, steel round bars frequently find application in fabricating diverse forms and items, including tools, automotive components, and machinery parts. The intense heat generated during the forging process endows the steel with enhanced malleability, rendering it more pliable and amenable to shaping, thereby yielding a final product that is robust and long-lasting.

Q: Can steel round bars be used in the manufacturing of agricultural equipment?: Yes, steel round bars can be used in the manufacturing of agricultural equipment. Steel is a strong and durable material that provides the necessary strength and structural integrity required for agricultural machinery. It is commonly used in the production of components such as axles, shafts, and supports, making it suitable for various types of farming equipment.

Q: What are the different surface coatings available for steel round bars?: There are several different surface coatings available for steel round bars, each with their own unique benefits and applications. Some of the most common surface coatings include: 1. Galvanized Coating: This involves applying a layer of zinc to the surface of the steel round bar through a process called hot-dip galvanizing. The zinc coating provides excellent corrosion resistance, protecting the steel from rust and other forms of degradation. Galvanized coatings are commonly used in outdoor and high-humidity environments. 2. Epoxy Coating: Epoxy coatings are applied as a powder or liquid and then cured through a chemical reaction. They offer excellent chemical resistance, durability, and protection against corrosion. Epoxy coatings are often used in industrial and marine applications where harsh chemicals or saltwater exposure are a concern. 3. Chrome Plating: This involves electroplating a layer of chromium onto the surface of the steel round bar. Chrome plating offers high corrosion resistance, as well as excellent hardness and wear resistance. It is commonly used in applications where aesthetic appeal and enhanced durability are desired, such as automotive parts and decorative fixtures. 4. Powder Coating: Powder coating is a dry finishing process that involves applying a powdered polymer to the surface of the steel round bar and then heat-curing it. This creates a durable and decorative finish that is resistant to chipping, scratching, and fading. Powder coatings are available in a wide range of colors and textures, making them popular for architectural and decorative purposes. 5. Black Oxide Coating: Black oxide is a conversion coating that is created by a chemical reaction with the steel surface. It provides a black, decorative finish while also offering mild corrosion resistance. Black oxide coatings are commonly used in applications where an aesthetic appearance is desired, such as firearms and hardware. These are just a few examples of the different surface coatings available for steel round bars. The choice of coating will depend on the specific requirements of the application, including the desired level of corrosion resistance, durability, and aesthetic appeal.

Q: Can steel round bars be used in the manufacturing of consumer goods?: Yes, steel round bars can be used in the manufacturing of consumer goods. Steel is a versatile and durable material that can be shaped into various forms, including round bars, to meet specific manufacturing requirements. These round bars can be utilized in the production of a wide range of consumer goods such as furniture, appliances, tools, and automotive components, among others.

Q: What are the different alloying elements used in steel round bars?: Steel round bars can be produced using various alloying elements that enhance their properties such as strength, durability, and specific characteristics. Some commonly utilized alloying elements in steel round bars include the following: 1. Carbon: Primarily used, carbon increases the hardness and strength of steel round bars, typically ranging from 0.2% to 2.1% carbon content. 2. Chromium: Added to improve corrosion and oxidation resistance, chromium also enhances hardness, strength, and wear resistance. Stainless steel round bars often contain significant amounts of chromium. 3. Nickel: Commonly found in stainless steel round bars, nickel improves corrosion resistance and mechanical properties, making the steel tougher and stronger. 4. Manganese: Added to enhance hardenability, strength, and wear resistance, manganese also contributes to the steel's ability to withstand impact and shock loading. 5. Molybdenum: Often used to enhance strength, toughness, and corrosion resistance, molybdenum also improves high-temperature strength and creep resistance. 6. Vanadium: Added to improve strength, toughness, and wear resistance, vanadium refines the steel's grain structure, enhancing its mechanical properties. 7. Tungsten: Utilized to increase hardness, strength, and resistance to wear and corrosion, tungsten also improves high-temperature strength and toughness. 8. Silicon: Added to improve strength, hardness, and resistance to oxidation, silicon aids in deoxidizing the steel during manufacturing. 9. Copper: Occasionally used, copper improves corrosion resistance, thermal conductivity, and electrical conductivity in steel. These alloying elements are just a few examples of those that can be used in steel round bars. The specific combination and proportion of these elements depend on the desired properties for the steel and the intended application of the round bars.

Q: What are the advantages of using niobium-alloy steel round bars?: There are several advantages to using niobium-alloy steel round bars. Firstly, niobium-alloy steel has excellent strength and toughness properties. The addition of niobium to the steel increases its strength while maintaining its ductility, making it ideal for applications that require high strength and durability. This allows niobium-alloy steel round bars to withstand heavy loads and shocks without deforming or breaking easily. Secondly, niobium-alloy steel has a high resistance to corrosion. This makes it suitable for use in harsh environments where exposure to moisture, chemicals, or corrosive substances is common. The corrosion resistance of niobium-alloy steel ensures that the round bars will remain intact and retain their structural integrity over time, reducing the need for frequent replacements and maintenance. Additionally, niobium-alloy steel has excellent weldability and formability. It can be easily welded and fabricated into various shapes and sizes, making it adaptable to different manufacturing processes and applications. This versatility allows for the production of custom-designed round bars that meet specific project requirements. Moreover, niobium-alloy steel has good heat resistance properties. It can withstand high temperatures without losing its strength or undergoing significant changes in its mechanical properties. This makes it suitable for applications that involve exposure to extreme heat or thermal cycling, such as in the aerospace or automotive industries. Furthermore, niobium-alloy steel is known for its excellent fatigue resistance. It has a high endurance limit, which means it can withstand repeated loading and unloading cycles without experiencing fatigue failure. This makes niobium-alloy steel round bars ideal for applications that involve dynamic or cyclic loading, such as in structural components or machinery. In conclusion, the advantages of using niobium-alloy steel round bars include high strength, corrosion resistance, weldability, formability, heat resistance, and fatigue resistance. These properties make niobium-alloy steel a reliable and cost-effective choice for various industries and applications.

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