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: Are steel round bars suitable for construction projects?: Construction projects can indeed make use of steel round bars. These materials are known for their durability and versatility, making them ideal for various applications in the construction industry. They are commonly utilized in the creation of buildings, bridges, highways, and other infrastructure projects. Steel round bars possess several advantages that make them beneficial for construction ventures, including their strength, ability to withstand heavy loads, and resistance to corrosion. They provide structural stability and can be easily shaped and manipulated to meet the specific needs of a construction project. In summary, steel round bars are a reliable and suitable option for construction projects due to their strength, durability, and versatility.

Q: What is the difference between a forged and a ground steel round bar?: A forged steel round bar is made by heating and shaping the steel through a process called forging, which involves applying extreme pressure to shape and compress the metal. This process enhances the strength and durability of the steel, making it suitable for applications that require high strength and resistance to wear and impact. On the other hand, a ground steel round bar is produced by removing material from the surface of a steel bar using grinding or machining processes. This results in a precise diameter and smooth surface finish, making it ideal for applications that require tight tolerances and a polished appearance. In summary, the main difference between a forged and a ground steel round bar lies in their manufacturing processes and resulting properties. Forged steel offers superior strength and toughness, while ground steel provides precise dimensions and a refined surface finish.

Q: What are the advantages of using duplex steel round bars?: Duplex steel round bars offer numerous benefits for various applications. Firstly, they provide exceptional resistance to corrosion. By combining chromium, nickel, and molybdenum, this steel can withstand harsh conditions found in marine and chemical industries. This makes it ideal for high exposure to corrosive elements. Secondly, duplex steel round bars possess great strength and toughness. The unique microstructure of this steel, combining ferrite and austenite phases, results in greater strength compared to traditional stainless steels. This makes them suitable for demanding applications requiring high load-bearing capacities. Additionally, duplex steel round bars exhibit excellent fatigue resistance. This makes them perfect for applications subjected to cyclic loading or dynamic stress, such as structural components or machinery parts. Their fatigue resistance allows for extended service life and reliability. Another advantage of using duplex steel round bars is their superior weldability. Their balanced chemical composition and microstructure enable easy fabrication and joining, reducing production time and costs in various industries. Furthermore, duplex steel round bars demonstrate exceptional resistance to stress corrosion cracking (SCC). This makes them a preferred choice for applications with a high risk of SCC, such as offshore and oil and gas industries. Lastly, duplex steel round bars provide cost-effective solutions. Despite their superior properties, they are often more cost-effective than other high-performance materials. Their long service life, reduced maintenance requirements, and overall durability contribute to lower lifecycle costs, making them an economical choice for various applications. In conclusion, duplex steel round bars offer excellent corrosion resistance, high strength and toughness, good fatigue resistance, superior weldability, resistance to stress corrosion cracking, and cost-effectiveness. These properties make them a preferred choice for industries such as oil and gas, chemical processing, marine, and structural applications.

Q: Can steel round bars be used for gear applications?: Yes, steel round bars can be used for gear applications. Steel round bars are often used for manufacturing gears due to their high strength, durability, and ability to withstand heavy loads and wear. They can be machined and heat-treated to meet specific gear requirements, making them a suitable choice for various gear applications in industries such as automotive, machinery, and manufacturing.

Q: Are steel round bars magnetic?: Indeed, steel round bars have the potential to possess magnetic characteristics. The magnetism of steel is contingent on its composition and processing methods. The predominant steel alloys utilized, such as carbon steel or stainless steel, prominently feature iron as their primary constituent. Iron is recognized as a ferromagnetic substance, signifying its susceptibility to magnetization. Thus, steel round bars constructed from these alloys will inevitably display magnetic attributes. However, it is crucial to acknowledge that the strength of the magnetism can fluctuate depending on the precise composition of the steel. Certain stainless steel alloys, for instance, possess a lower magnetic permeability and may consequently manifest diminished magnetic traits in comparison to carbon steel.

Q: Can steel round bars be used for making crankshafts?: Crankshafts can be made using steel round bars, which are known for their high strength, durability, and ability to withstand the stress and load of engine operation. Steel is a preferred material for crankshafts because it provides a solid and reliable foundation for the rotating assembly. The round shape of the bars allows for easy machining and shaping to achieve the desired crankshaft design. Furthermore, steel can be heat-treated to improve its mechanical properties, including hardness and fatigue resistance, making it perfect for the demanding conditions and high-performance needs of crankshafts in different engine applications.

Q: Can steel round bars be used for making springs?: Springs can indeed be made using steel round bars. The reason why steel is widely chosen as a spring material is because of its excellent strength and durability. Steel round bars can be transformed into different types of springs, which include compression springs, extension springs, and torsion springs. To achieve the desired hardness and springiness, the round bar can be cut to the desired length and then subjected to heat treatment. The spring's characteristics, such as its load-bearing capacity, flexibility, and resistance to fatigue, are determined by the specific type of steel used and the heat treatment process. However, it is crucial to remember that designing and engineering springs require careful consideration of factors like the required spring rate, maximum load, and operating conditions in order to ensure optimal performance.

Q: Use of stainless steel round bar: Stainless steel round bar has a broad application prospect, and is widely used in hardware, kitchenware, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, aerospace and other architectural decoration. Equipment, chemicals, dyes, paper making, oxalic acid, fertilizer, etc.; equipment for photography, food industry, coastal areas, ropes, CD poles, bolts, nuts, etc..

Q: What is the maximum chromium content allowed for steel round bars?: The maximum chromium content allowed for steel round bars depends on the specific grade or specification of the steel. Generally, the chromium content in steel round bars can range from 0.15% to 30%, but this can vary greatly depending on the intended application and desired properties of the steel. Higher chromium content is often found in stainless steel grades, which are known for their corrosion resistance. It is important to consult the relevant industry standards or specifications to determine the maximum chromium content allowed for specific steel round bars.

Q: What are the advantages of using steel round bars?: Using steel round bars in various applications has several benefits. First and foremost, steel round bars are renowned for their exceptional strength and durability, making them perfect for construction projects as they can withstand heavy loads and provide structural integrity. Moreover, steel round bars exhibit excellent resistance to corrosion, making them suitable for outdoor and marine applications. They can endure harsh weather conditions and remain unaffected by moisture and chemicals, resulting in a longer lifespan and reduced maintenance costs. In terms of versatility, steel round bars offer a wide range of customization options, allowing them to be tailored to specific requirements. This makes them suitable for construction, manufacturing, and engineering projects where precise dimensions and specifications are crucial. Additionally, steel round bars have excellent machinability, making them easy to cut, drill, and shape. This adaptability saves time and effort during the fabrication process, making them highly convenient to work with. Moreover, steel round bars possess a high tensile strength, enabling them to resist deformation under pressure. This makes them an ideal choice for applications that require exceptional strength, such as in the manufacturing of machinery, tools, and automotive components. Lastly, steel round bars are cost-effective compared to other materials. Their durability and long lifespan result in reduced maintenance and replacement costs over time. Furthermore, their availability and widespread use make them a cost-efficient option for various industries. Overall, the advantages of using steel round bars include their exceptional strength, resistance to corrosion, versatility, machinability, high tensile strength, and cost-effectiveness. These qualities contribute to their widespread usage in industries worldwide.

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