15mm*1.77kg/m square bar for construction

15mm*1.77kg/m square bar for construction System 1

15mm*1.77kg/m square bar for construction

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 100000 m.t./month

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Product Description:

Hollow Section-Square Tubes

Application:

It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.

Standard：

ASTM A500, GB6728

Steel grade:

ASTM A500: A, B, C

GB6728：Q195，Q215，Q235，Q345

Size of Pipe:

*Remark: Besides below sizes, we also can arrange production based on requirement of customers

SIZE(mm)	THICKNESS(mm)
10×10	0.6-1.0
12×12	0.6-1.0
16×16	0.6-1.2
19×19	0.6-1.5
20×20	1.6-1.5
25×25	1.0-2.75
30×30	1.0-2.75
32×32	1.0-3.0
38×38	1.0-3.0
40×40	1.0-3.5
50×50	1.0-5.0
60×60	1.0-6.0
63.5×63.5	1.0-6.0
70×70	1.5-6.0
75×75	1.5-6.0
80×80	2.0-6.0
90×90	2.0-6.0
100×100	2.3-6.0
120×120	4.0-6.0
125×125	4.0-6.0
150×150	4.0-8.0
200×200	6.0-12
250×250	6.0-12
300×300	6.0-12
400×400	6.0-12

Standard: ASTM A500

Chemical Composition(%)

Chemical Requirement
	Composition %
	Grade A		Grade B
	Heat	Product	Heat	Product
Element	analysis	analysis	analysis	analysis
Carbon max	0.26	0.3	0.22	0.26
Manganese max	…	…	1.4	1.45
Phosphorus, max	0.035	0.045	0.03	0.04
Sulfur max	0.035	0.045	0.02	0.03
Where an ellipsis (...)appears in this table, there is no requirement
For each reduction of 0.01 percentage point below the specified maximum for carton, and increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.6% by product analysis

Mechanical Properties

Tensile Requirement
	Grade A	Grade B
Tensile strength, min, psi (Mpa)	48000 (400)	70000 (483)
Yield strength, min, psi (Mpa)	36000 (250)	50000 (345)
Elongation in 2 in. (50.8mm), min, %	23	23

GB6728：

Steel Grade

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES

C (%)

Si (%)

(%)

P(%)

Max

S (%)

Max

YS(Mpa)

Min

TS(Mpa)

Min

El (%)

Min

Q195

0.06-0.012

0.3

0.25-0.5

0.45

0.5

195

315

Q215

0.09-0.15

0.3

0.25-0.55

0.45

0.5

215

335

Q235

0.12-0.22

0.3

0.3-0.7

0.45

235

375

Q345

0.20

0.55

1.0-1.6

0.45

345

510

producing of Hollow Section-Square Tubes

Square Welded Hollo Sectio/Welded Rectangle Hollow Section

delivery of Hollow Section-Square Tubes

Q: How do you use a steel square to measure and mark beveled angles?: In order to measure and mark beveled angles using a steel square, it is necessary to follow a few straightforward steps. To begin, ensure that your steel square is clean and devoid of any debris or rust, as this will guarantee accurate measurements and markings. Following that, identify the specific angle you wish to measure and mark. Let's assume you desire to mark a 45-degree beveled angle. Position the long edge of the steel square against the material's edge that you wish to mark, specifically the edge where the beveled angle should commence. Subsequently, rotate the steel square until the 45-degree line aligns with the material's edge. This line can usually be found on the inside of the square, typically marked with a numerical value or a symbol. Once the 45-degree line is properly aligned, firmly hold the steel square against the material and utilize a pencil or scribe to mark the line along the opposite edge of the square. Congratulations! You have now successfully measured and marked a 45-degree beveled angle using a steel square. Keep in mind that the process may differ depending on the angle you wish to measure and mark. Some steel squares may feature additional lines or markings specifically designed to assist with certain angles. If you are uncertain about a particular angle, it is always advisable to consult the manufacturer's instructions or guides.

Q: Can a steel square be used for concrete formwork?: No, a steel square is not typically used for concrete formwork. Concrete formwork requires the use of specialized materials such as plywood, timber, or metal panels that are capable of holding the weight and pressure of the wet concrete. Steel squares are primarily used for measuring and marking angles in carpentry and construction tasks.

Q: Are there any safety precautions to consider when using a steel square?: Yes, there are several safety precautions to consider when using a steel square: 1. Wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and a dust mask. This will protect you from potential injuries or the inhalation of dust or debris. 2. Ensure that the steel square is in good condition and free from any defects or damage. Using a damaged or warped square can compromise the accuracy of your measurements and potentially lead to accidents. 3. Always handle the steel square with care and avoid dropping it. Dropping a heavy steel tool can cause injury to your feet or damage to the surrounding area. 4. When using the square for cutting or sawing operations, make sure the material being cut is firmly secured to prevent it from moving or slipping during the process. This will help prevent accidents and ensure accurate cuts. 5. Be cautious of sharp edges or corners on the steel square. Avoid running your hands or fingers along these edges to prevent cuts or lacerations. 6. Store the steel square in a safe and secure place when not in use. This will prevent accidental tripping or falling hazards and keep the tool in good condition. By following these safety precautions, you can minimize the risk of accidents and ensure safe use of a steel square.

Q: How do you use a steel square to mark a line parallel to a board edge at a specific distance?: To achieve a line parallel to a board edge at a specific distance, you can follow these instructions: 1. Determine the desired distance for the parallel line. For instance, if you want the line to be 2 inches away from the board edge, take note of this measurement. 2. Align one side of the steel square parallel to the board edge, ensuring that it is flush against the board without any tilting or skewing. 3. Once the square is properly aligned, use a pencil or marking tool to make a reference point on the board along the square's edge. 4. Proceed to move the steel square along the board edge while maintaining the parallel alignment. Be consistent in keeping the same distance between the square's edge and the reference mark you made earlier. For example, if the desired distance is 2 inches, always ensure the square's edge is 2 inches away from the reference mark. 5. While moving the steel square, continue marking reference points at regular intervals. These points will serve as a guide for drawing a straight line later on. 6. Once you have marked enough reference points along the board edge, connect them using your pencil or marking tool to create a straight line. This line will remain parallel to the board edge with the specified distance maintained throughout its length. By utilizing a steel square and following these steps, you can accurately mark a line parallel to a board edge at a specific distance. This technique is commonly employed in woodworking, carpentry, and related trades to ensure precise measurements and markings.

Q: Can a steel square be used for checking the alignment of wall cabinets?: Yes, a steel square can be used for checking the alignment of wall cabinets. A steel square, also known as a framing square or a carpenter's square, is a versatile tool commonly used by carpenters and construction professionals for measuring and checking right angles. To use a steel square for checking the alignment of wall cabinets, you can place it against the corner of the cabinet and use it to ensure that the cabinet is square and properly aligned. The straight edges of the steel square can be used to check that the sides of the cabinet are parallel and straight. Additionally, the inside edge of the steel square can be used to verify that the corners are at 90-degree angles. Overall, a steel square can be a useful tool in ensuring the proper alignment of wall cabinets during installation.

Q: What are the dimensions of a standard steel square?: The dimensions of a standard steel square can vary depending on the specific type and purpose of the square. However, a commonly used standard steel square, known as a try square or carpenter's square, typically has a blade length of around 6 to 12 inches (15 to 30 centimeters) and a handle length of around 4 to 6 inches (10 to 15 centimeters). The blade and handle are usually at a right angle to each other, forming a perfect 90-degree angle. This allows for precise measurements and squareness when working on various woodworking or metalworking projects.

Q: How do you read measurements on a steel square?: Before you can read measurements on a steel square, it is essential to grasp the various markings and graduations on the tool. Typically, a steel square comprises two arms, namely the blade (the longer one) and the tongue (the shorter one), which create a 90-degree angle. The blade is adorned with a series of markings and numbers, usually in inches or centimeters, that represent its length. The numbers commence at 0 where the blade and tongue intersect, and they increment as you progress towards the outer edge of the blade. Similarly, the tongue of the steel square also possesses a scale marked in inches or centimeters. This scale is employed for measuring perpendicular to the blade's edge. Just like the blade, the numbers on the tongue initiate at 0 at the intersection and rise as you approach the outer edge. To read measurements accurately, align the desired point on the object you are measuring with the intersection of the blade and tongue. Then, observe the markings on either the blade or the tongue that correspond to the length or width you intend to measure. For instance, if you wish to measure a length of 4 inches, locate the number 4 on either the blade or the tongue and take note of the corresponding point on the object. Moreover, steel squares may feature additional markings or characteristics to aid in various tasks such as identifying angles or determining roof pitches. Familiarizing yourself with these supplementary markings can substantially enhance the versatility of the tool. In summary, reading measurements on a steel square entails comprehending the markings and graduations on the blade and tongue, aligning the tool with the object being measured, and recording the corresponding numbers to ascertain the length or width accurately.

Q: Can a steel square be used for checking the levelness of a door frame?: No, a steel square cannot be used for checking the levelness of a door frame. A steel square, also known as a framing square or carpenter's square, is primarily used for measuring and marking right angles in carpentry work. While it can be useful for checking the squareness and alignment of the door frame, it is not designed or accurate enough to determine the levelness of the frame. For checking the levelness of a door frame, a spirit level or a laser level would be more appropriate and accurate tools.

Q: Are steel squares available in different sizes?: Yes, steel squares are available in different sizes to cater to various measurement needs and applications.

Q: What is the hot dip galvanized steel, production process?: Also called hot galvanized and hot dip galvanizing: hot dip galvanizing is an effective way of metal corrosion, mainly used for metal structure on the facilities of the industry.

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