Hot Roll Square Steel Bar with Grade Q195 / Q235
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 5000 m.t.
- Supply Capability:
- 100000 m.t./month
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OKorder Financial Service
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Product Description:
OKorder is offering Hot Roll Square Steel Bar with Grade Q195 / Q235 at great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to European, North American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
Hot Roll Square Steel Bar with Grade Q195 / Q235 are ideal for structural applications and are widely used in the construction of buildings and bridges, and the manufacturing, petrochemical, and transportation industries.
Product Advantages:
OKorder's Hot Roll Square Steel Bar with Grade Q195 / Q235 are durable, strong, and resist corrosion.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Corrosion resistance
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
We offer Square Steel Bar with grade Q195 / Q235
Specifications of Square Steel Bar:
-Standard: GB,
-Grade: Q195/Q235 or equivalent.
Chemical Composition:
-Chemical Composition. Q195
Standard | Grade | Element (%) | ||||
GB | Q195 | C | Mn | S | P | Si |
0.06~0.12 | 0.25~0.50 | ≤0.050 | ≤0.045 | ≤0.30 | ||
-Chemical Composition. Q235
Standard | Grade | Element (%) | ||||
GB | Q235B | C | Mn | S | P | Si |
0.12~0.20 | 0.30~0.70 | ≤0.045 | ≤0.045 | ≤0.30 | ||
Measures and Tolerances of Square Steel Bar:
(The section of Square Steel Bar)
The length of a side and the theoretical weight of Square Steel.
Length of a side(a, mm) | Theoretical weight(kg/m) | Length of a side(a, mm) | Theoretical weight(kg/m) |
6 | 0.283 | 32 | 8.04 |
7 | 0.385 | ＊33 | 8.55 |
8 | 0.502 | 34 | 9.07 |
9 | 0.636 | ＊35 | 9.62 |
10 | 0.785 | 36 | 10.17 |
11 | 0.950 | 38 | 11.24 |
12 | 1.13 | 40 | 12.56 |
13 | 1.33 | 42 | 13.85 |
14 | 1.54 | 45 | 15.90 |
15 | 1.77 | 48 | 18.09 |
16 | 2.01 | 50 | 19.63 |
17 | 2.27 | 53 | 22.05 |
18 | 2.54 | ＊55 | 23.6 |
19 | 2.82 | 56 | 24.61 |
20 | 3.14 | ＊58 | 26.4 |
21 | 3.46 | 60 | 28.26 |
22 | 3.80 | 63 | 31.16 |
＊23 | 4.15 | ＊65 | 33.17 |
24 | 4.52 | ＊68 | 36.3 |
25 | 4.91 | 79 | 38.49 |
26 | 5.30 | 75 | 44.16 |
＊27 | 5.72 | 80 | 50.24 |
28 | 6.15 | 85 | 56.72 |
＊29 | 6.60 | 90 | 63.59 |
30 | 7.06 | 95 | 70.85 |
＊31 | 7.54 | 100 | 78.50 |
Notes:
1, The theoretical weights in the list, base on the density of 7.85 g/cm3.
2, The numbers with ＊mean that they are not regulars or we don’t offer them
-The allowed tolerance of Square Steel:
Length of a side(mm) | Allowed Tolerance | ||
Group1 | Group2 | Group3 | |
5.5～7 | ±0.20 | ±0.30 | ±0.40 |
7～20 | ±0.25 | ±0.35 | ±0.40 |
20～30 | ±0.30 | ±0.40 | ±0.50 |
30～50 | ±0.40 | ±0.50 | ±0.60 |
60～80 | ±0.60 | ±0.70 | ±0.80 |
80～110 | ±0.90 | ±1.0 | ±1.1 |
110～150 | ±1.2 | ±1.3 | ±1.1 |
150～190 | ―― | ―― | ±2.0 |
190～250 | ―― | ―― | ±2.5 |
Usage/Applications of Steel Square Bar:
-The Square Steel is normally used as structure steel.
-Row material for other structure steel like steel angles, channels, I-beams, H-beams, etc
Packaging & Delivery of Steel Square Bar:
-Packing Detail: The products can be packed in bundles by steel wires.
-Marks:
1, Tag marks: the tag marks will be tied up to each bundle of the products. The information is usually including supplier’s logo and name, product name, made in China, products’ specifications, the painted color and other information requested by customers.
2, Color marks: we will paint both ends of the bundles of these products to make sure that they are more evident. It’s will be more convenient for the customers to distinguish them at the destination port.
-Delivery Detail: 30~45 working days after receive buyer’s T.T. or L/C.
Transportation:
-The products can be delivered by bulk vessel or by container. As for container, products with the length of 6m will be loaded in 20’ container, with 9m or 12m, in 40’ container.
-The maximum quantity of loading of container is 25 tons.
-The products usually are transported to the nearest port from the production place.
Payment:
-Invoicing on theoretical weight or actual weight a s customer’s request.
-FOB, CFR or CIF.
-Regular terms of payment:
1, 30% payment in advance, the remaining balance (70% payment) against the copy of B/L.
2, 30% payment in advance, the remaining balance (70% L/C) against the copy of B/L.
3, Negotiable.
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
- Q: What are the main factors affecting the strength of steel billets?
- There are several main factors that can affect the strength of steel billets. 1. Composition: The chemical composition of the steel, including the types and amounts of various elements, plays a significant role in determining its strength. Alloying elements such as carbon, manganese, and silicon can enhance the strength of steel by forming solid solutions or creating carbides, which increase the steel's hardness and resistance to deformation. 2. Heat treatment: The heat treatment process, which involves heating and cooling the steel billets under controlled conditions, can have a significant impact on its strength. Different heat treatment methods, such as annealing, quenching, and tempering, can alter the microstructure of the steel, leading to variations in its strength properties. 3. Grain size: The size and distribution of the grains within the steel structure can affect its strength. Smaller grain sizes tend to increase the strength of steel, as they hinder dislocation movement and promote grain boundary strengthening. Various processing techniques, such as hot rolling and controlled cooling, can be employed to achieve fine-grained steel billets. 4. Microstructure: The microstructure of steel, which includes the arrangement and morphology of the different phases or constituents, can influence its strength. For example, the presence of certain phases like martensite or bainite can significantly increase the strength of steel by providing a more rigid and stable structure. 5. Processing conditions: The processing conditions during the production of steel billets can impact their strength. Variables such as rolling temperature, deformation rate, and cooling rate can affect the microstructural evolution and mechanical properties of the steel. Proper control of these processing parameters is crucial to achieving the desired strength characteristics. 6. Inclusions and defects: The presence of inclusions or defects, such as non-metallic particles or voids, within the steel can weaken its strength. These imperfections act as stress concentrators and can initiate cracks or fractures, reducing the overall strength and integrity of the steel billets. By considering and optimizing these factors, manufacturers can produce steel billets with enhanced strength properties, enabling their use in various applications where high strength and durability are required.
- Q: What are the different surface treatments for improved surface cleanliness in steel billets?
- Improving surface cleanliness in steel billets can be achieved through various surface treatments. These treatments aim to eliminate impurities, oxides, and contaminants from the billet surface, resulting in a more uniform and cleaner appearance. One commonly used surface treatment is pickling, which involves immersing the steel billets in an acid solution. By dissolving and removing any oxides or scale present on the surface, pickling not only cleans the billet but also enhances the adhesion of subsequent coatings or treatments. Another option for surface treatment is shot blasting or abrasive blasting. This method entails propelling abrasive materials, like steel shot or grit, at high speeds onto the billet surface. The impact of these abrasive particles effectively eliminates contaminants, rust, or scale, thereby achieving a cleaner surface. Shot blasting is particularly suitable for preparing steel billets for further processing or coating. Chemical cleaning serves as another technique to enhance cleanliness in steel billets. This process involves employing chemical agents to dissolve and eliminate contaminants from the surface. Depending on the type and severity of the contaminants, different chemicals, such as alkaline or acid-based solutions, can be used. Chemical cleaning proves effective in removing stubborn contaminants or residues from the billet surface. Moreover, mechanical cleaning methods, namely wire brushing or grinding, can contribute to improved surface cleanliness. These approaches involve physically removing contaminants or scale from the surface using mechanical means. Wire brushing utilizes wire bristles to scrub the surface, while grinding employs abrasive materials to eliminate imperfections or contaminants. In summary, the selection of a surface treatment for enhancing cleanliness in steel billets depends on several factors, including the specific contaminants, desired cleanliness level, and intended application. It is crucial to consider the effectiveness, cost, and environmental impact of each treatment method to identify the most suitable option.
- Q: Are steel billets prone to corrosion?
- Yes, steel billets are prone to corrosion. Steel is primarily made from iron, and iron is susceptible to rusting and oxidation when exposed to moisture and oxygen. Therefore, steel billets, which are the raw form of steel used for further processing, can corrode if not properly protected or maintained.
- Q: How are steel billets used in the manufacturing of hydraulic cylinders?
- Steel billets are used in the manufacturing of hydraulic cylinders as the raw material. These billets are carefully shaped, machined, and processed to create the cylinder's main body, ensuring its strength, durability, and resistance to pressure. The steel billets are precisely cut, heated, and forged into the desired shape, forming the base structure of the hydraulic cylinder.
- Q: What are the main factors affecting the formability of stainless steel billets?
- The main factors affecting the formability of stainless steel billets include the composition of the steel, its microstructure, temperature, strain rate, and lubrication during the forming process. Additionally, the presence of impurities, such as sulfur and phosphorus, can also impact formability.
- Q: Our caster is square billet! 150X500! That is, every time we open the head, there is slag inclusion. And pores! Yes, the first 3 meters! There's no more left behind! How did it happen, please?! We have a refinery and electromagnetic stirring! Give me a hand!
- 1. Whether the injection hole before the casting is replaced with the protective slag instead of the special drainage sand, and whether the drain sand is dry or not2, whether it is too early to start adding protective slag is to protect the slag whether it is dry or not3, the opening of the mold to maintain the steel surface uniform and stable, rising to the required height, the key is fluctuation.
- Q: How are steel billets tested for internal defects?
- Steel billets are tested for internal defects using non-destructive testing methods such as ultrasound, magnetic particle inspection, and eddy current testing. These techniques allow for the detection of cracks, voids, and other imperfections within the billet without causing any damage to the material.
- Q: How are steel billets inspected for surface cleanliness?
- Steel billets are inspected for surface cleanliness through a series of visual and nondestructive testing methods. One of the commonly used techniques is visual inspection, where trained inspectors visually examine the surface of the billets for any visible impurities, such as scale, rust, dirt, or any other contaminants. This method helps identify any surface irregularities that may affect the quality of the billets. Additionally, nondestructive testing methods like magnetic particle inspection (MPI) and ultrasonic testing (UT) are employed to further evaluate the surface cleanliness of steel billets. Magnetic particle inspection involves applying a magnetic field to the billet's surface and then applying iron particles to it. If any surface cracks or defects are present, the iron particles will be attracted to these areas, making them visible to the inspector. Ultrasonic testing, on the other hand, uses high-frequency sound waves to detect any internal or surface defects. A probe is placed on the billet's surface, and sound waves are transmitted into the material. These waves are then reflected back to the probe and analyzed to identify any defects, such as inclusions or voids, which may affect the surface cleanliness. Overall, a combination of visual inspection, magnetic particle inspection, and ultrasonic testing is used to ensure that steel billets meet the required surface cleanliness standards. These inspection methods help identify any impurities or defects that could potentially compromise the quality and performance of the final steel product.
- Q: Does anyone know how much it costs to refine a ton of steel? What are the expenses involved?
- Electricity, water, wages, raw materials, raw materials loss, charges, oxygen, according to their own circumstances, as well as freight and other expenses,
- Q: What are the different heat treatment processes for steel billets?
- Steel billets can undergo various heat treatment processes, each serving a specific purpose and offering distinct advantages. Among the commonly used processes are annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing: The steel billets are heated to high temperatures and gradually cooled to room temperature. This process aims to reduce hardness, enhance machinability, relieve internal stresses, and refine the grain structure, resulting in a more ductile and less brittle steel. 2. Normalizing: By heating the steel billets above the critical range and cooling them in still air, the normalizing process refines the grain structure, improves mechanical properties and machinability, relieves internal stresses, and achieves uniformity in microstructure. 3. Quenching: Rapid cooling of steel billets is achieved by immersing them in a quenching medium like oil, water, or brine. Quenching transforms the austenite phase into martensite, making the steel harder and more wear-resistant. However, it may introduce residual stresses and the risk of cracking. 4. Tempering: Following quenching, tempering is often performed to reduce brittleness and enhance toughness. The quenched steel is reheated to a lower temperature and held for a specific time period. This process relieves stresses, decreases hardness, and improves ductility without sacrificing too much strength. 5. Case Hardening: This process elevates the surface hardness of steel billets while maintaining a tough and ductile core. Carburizing and nitriding are two common methods of case hardening. Carburizing involves heating the steel in a carbon-rich environment to introduce carbon into the surface. Nitriding, on the other hand, introduces nitrogen to form a hard nitride layer. These processes enhance wear resistance and prolong the lifespan of the steel billets. These heat treatment processes allow manufacturers to customize the properties of steel billets to meet specific application requirements. By carefully selecting and implementing the appropriate process, the resulting steel billets can exhibit a wide range of mechanical properties, including hardness, strength, toughness, and wear resistance.
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Hot Roll Square Steel Bar with Grade Q195 / Q235
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 5000 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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