Hot Rolled Alloy Structural Steel Round Bar SCM440

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 1

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 2

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 3

Hot Rolled Alloy Structural Steel Round Bar SCM440 System 4

Hot Rolled Alloy Structural Steel Round Bar SCM440

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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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Standard	Grade	C	Cr	Mo	Si	Mn	P	S	Ni	Cu

GB	42CrMo	0.38-0.45	0.90-1.20	0.15-0.25	0.17-0.37	0.50-0.80	0.035	0.035	0.3	0.3
JIS	SCM440	0.38-0.43	0.90-1.20	0.15-0.30	0.15-0.35	0.60-0.90	0.03	0.03	0.25	0.3
ASTM	4140	0.38-0.43	0.80-1.10	0.15-0.25	0.15-0.35	0.75-1.00	0.035	0.04	—	—
ENISO	42CrMo4	0.38-0.45	0.90-1.20	0.15-0.30	≤0.40	0.60-0.90	0.035	0.035	—

Grade	aisi4140 astm4140 sae4140 42CrMo,1.7225,scm440,42CrMo4
Processing	EAF+LF+VD
Commodity	steel round bar/round steel bar/round bar steel
Technique	hot rolled
Diameter	10-310mm
Length	canbe required to 3-12m
Sizes tolerance	length: +/-100mm,straightless:3mm/m
Application	1) General service industries (petroleum, food, chemical, paper, fertilizer, Fabric, aviation and nuclear) 2) Fluid, gas and oil transport 3) Pressure and heat transmission 4) Construction and ornament 5) Boiler heat exchangers
Advantages of this material	1) High fatigue strength and impact resistance after tempering 2) Good low-temperature impact toughness 3) No obvious temper brittleness
Quality Condition	1): Straightness: 3mm/m (max) 2): Corner Radius: 3(max) 3): The ends will be end cut or gas cut 4): No cracks on the surface
Packing	1): Paint oil on the surface to protect steel bars from rusting. 2): Bundle packing by Iron Strips. 3): Bundle weight is from 2mt to 3 mt. 4): Two or three tags will be attached on each bundle.
MOQ	5 tons for each sizes

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:Grade 1 steel is round steel, grade two steel is ribbed thread steel. Are the weight of the two units the same?: Grade two steel is ribbed steel, but the average diameter is calculated. The chemical composition of grade steel and grade two steel is different, but the density of them is the same. Therefore, the unit weight of grade 1 steel and grade two steel is the same.

Q:Can steel round bars be used in the manufacturing of pumps?: Indeed, pumps can be manufactured using steel round bars. These round bars are widely utilized in diverse industries owing to their robustness, longevity, and adaptability. In the realm of pump manufacturing, steel round bars are frequently employed as shafts or rotors due to their capacity to endure intense pressure and rotational forces. To meet the specific demands of pump designs, these round bars can be subjected to machining, forging, or heat treatment processes. Moreover, steel round bars offer exceptional resistance to corrosion, rendering them suitable for pumps deployed in a variety of environments. On the whole, steel round bars constitute a dependable and prevalent material in the realm of pump manufacturing.

Q:What are the different surface hardness options for steel round bars?: Steel round bars can exhibit varying degrees of surface hardness, depending on the specific requirements and applications. There are several options available for achieving different levels of surface hardness in steel round bars: 1. Soft or annealed: At the lowest end of the surface hardness spectrum, steel is subjected to a heating and gradual cooling process to reduce internal stress and enhance ductility. Soft or annealed steel is easier to machine and shape, but it possesses lower strength and wear resistance. 2. Normalized: By heating steel to a predetermined temperature and subsequently cooling it in ambient air, the grain structure is refined, resulting in improved mechanical properties and increased hardness compared to annealed steel. 3. Quenched and tempered: This heat treatment process involves heating steel to high temperatures and quickly cooling it in a quenching medium like oil or water. The rapid cooling hardens the steel's surface, while the subsequent tempering process alleviates internal stresses and enhances toughness. Quenched and tempered steel round bars exhibit high levels of hardness and strength, making them suitable for applications requiring resistance to wear and impact. 4. Induction hardened: Through induction hardening, the surface of a steel round bar is selectively heated using an induction coil. This localized heating is followed by rapid quenching, resulting in a hardened surface layer that exhibits increased wear resistance. The core of the steel remains unaffected, retaining its toughness. 5. Case hardened: Also known as carburizing, case hardening involves introducing carbon into the surface layer of the steel round bar. This can be achieved by exposing the steel to a carbon-rich gas or heating it with a carbon-containing material. The carbon diffuses into the surface, increasing its hardness while leaving the core relatively softer. Case hardened steel round bars possess a tough core with a wear-resistant surface. These examples represent only a fraction of the available surface hardness options for steel round bars. The choice of hardness depends on specific application requirements such as required strength, wear resistance, and toughness.

Q:Can steel round bars be used for making gates?: Yes, steel round bars can be used for making gates. Steel round bars are strong and durable, making them suitable for gate construction. They can be welded together to create a sturdy gate frame, and can also be used for decorative elements or as pickets. Additionally, steel round bars can be easily customized and shaped to fit the desired gate design.

Q:Is there a steel bar of 6 diameter on the market?: Round 6 steel is very common on the market. A round bar with a diameter of six.

Q:How do steel round bars contribute to sustainable construction?: Steel round bars contribute to sustainable construction in several ways. Firstly, steel is a highly durable and long-lasting material. Steel round bars are known for their strength and resilience, which allows them to withstand heavy loads and extreme weather conditions. This durability ensures that structures built with steel round bars have a longer lifespan, reducing the need for frequent repairs or replacements. This not only saves money but also reduces the environmental impact associated with the production and disposal of construction materials. Additionally, steel is a highly recyclable material. When a structure reaches the end of its life cycle, the steel round bars can be easily and efficiently recycled. This reduces the demand for virgin steel production, which is an energy-intensive and environmentally harmful process. Recycling steel also helps to reduce waste in landfills and conserve natural resources. Moreover, steel round bars can be prefabricated off-site, which offers several environmental benefits. Prefabrication allows for greater precision and efficiency in construction, reducing material waste and energy consumption. It also minimizes noise, dust, and pollution on-site, making construction projects more sustainable and less disruptive to the surrounding environment. Furthermore, steel round bars are often used in sustainable building designs. Steel structures can be designed to maximize natural light and ventilation, reducing the need for artificial lighting and air conditioning. This improves energy efficiency and reduces greenhouse gas emissions. Steel's versatility also allows for flexible and adaptable designs, facilitating future modifications and extensions without significant demolition or waste generation. Lastly, steel round bars are commonly used in the construction of green buildings and sustainable infrastructure. These structures are designed to minimize their environmental impact throughout their life cycle, from construction to operation and eventual decommissioning. Steel's attributes, such as its recyclability, durability, and energy efficiency, make it a preferred choice in sustainable construction practices. In conclusion, steel round bars contribute to sustainable construction by offering durability, recyclability, prefabrication opportunities, energy efficiency, and versatility. By using steel in construction projects, we can reduce waste, conserve resources, minimize environmental impact, and create structures that are built to last.

Q:What are the different grades of steel used for round bars?: There are several different grades of steel that are commonly used for round bars. These grades vary in their composition and properties, making them suitable for different applications. Some of the most common grades of steel used for round bars include: 1. Mild Steel (Low Carbon Steel): This is the most basic and widely used grade of steel. It has a low carbon content, which makes it easy to work with and relatively inexpensive. Mild steel round bars are commonly used in construction, automotive, and general engineering applications. 2. Carbon Steel: This grade of steel contains higher levels of carbon than mild steel, giving it improved strength and hardness. Carbon steel round bars are often used in high-stress applications, such as structural components, axles, and shafts. 3. Alloy Steel: Alloy steel round bars are made by adding various alloying elements, such as chromium, nickel, or molybdenum, to the base steel. This enhances the strength, toughness, and corrosion resistance of the material. Alloy steel round bars are commonly used in aerospace, automotive, and machinery industries. 4. Stainless Steel: Stainless steel is a corrosion-resistant grade of steel that contains high levels of chromium. It is known for its excellent strength, durability, and resistance to rust and staining. Stainless steel round bars are widely used in the food industry, marine applications, and architectural components. 5. Tool Steel: Tool steel round bars are specifically designed to have high hardness, wear resistance, and heat resistance. They are commonly used in the manufacturing of cutting tools, dies, and molds. These are just a few examples of the different grades of steel used for round bars. Each grade offers unique properties and characteristics, allowing for a wide range of applications across various industries.

Q:Can steel round bars be used for shafting applications?: Yes, steel round bars can be used for shafting applications. Steel round bars are commonly used as shafting material in various industries such as automotive, construction, and manufacturing. They offer high strength, durability, and excellent mechanical properties, making them suitable for transmitting power and rotational motion in machines and equipment. Steel round bars can be machined to precise dimensions, heat-treated for increased hardness, and coated to provide corrosion resistance. Additionally, they are available in different grades and alloys to meet specific application requirements. Overall, steel round bars are a reliable choice for shafting applications due to their inherent strength and versatility.

Q:Can steel round bars be used in the manufacturing of home decor?: Yes, steel round bars can be used in the manufacturing of home decor. They are versatile and can be shaped and welded into various forms, making them suitable for creating furniture, sculptures, and other decorative elements for homes.

Q:Can steel round bars be used for making fasteners?: Certainly! Fasteners can indeed be made using steel round bars. Manufacturers commonly utilize steel round bars to produce fasteners like bolts, screws, and rivets. The strength and durability of steel make it an excellent choice for fasteners, as it can endure significant stress and ensure a secure connection. Moreover, steel round bars can be conveniently machined and threaded to achieve the desired shape and size required for fasteners. In summary, steel round bars are highly dependable and frequently employed in the manufacturing process of fasteners.

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