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

Ref Price:

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 does a steel square assist in determining the correct angle for a mitered dovetail joint?: To achieve a perfect fit in a mitered dovetail joint, it is crucial to maintain each angle at 45 degrees. A steel square proves to be a valuable asset in this process, as it facilitates precise measurements and angle determinations. When creating the joint, one can easily measure and mark the desired angle on both the joining and attaching pieces using the steel square. By aligning the square against the edges of these pieces, one can ensure accurate and consistent angles. Furthermore, the steel square serves the purpose of verifying the squareness of the joint by placing it against the inner corner. This step helps guarantee proper alignment and flushness between the pieces prior to assembly. In conclusion, the use of a steel square is indispensable in accurately determining the correct angle for a mitered dovetail joint. Its ability to provide precise measurements, marking, and angle checking ensures a robust and precise joint.

Q:Can a steel square be used for checking the squareness of a workbench leg?: A workbench leg's squareness can be checked using a steel square, a versatile tool commonly employed in woodworking and construction to guarantee precise right angles and squareness. To examine the squareness of a workbench leg, one can position the steel square against both the leg and the surface it should be perpendicular to. By aligning the square with the leg and verifying the perfect perpendicularity of the edges, one can ascertain whether the leg is square or requires adjustments. The steel square offers a dependable and accurate means of measuring squareness in different scenarios, such as with workbench legs.

Q:Can a steel square be used for checking the squareness of a lathe tailstock?: No, a steel square is not suitable for checking the squareness of a lathe tailstock. A precision square specifically designed for this purpose should be used to ensure accurate measurements and alignment.

Q:How do you store a steel square to prevent rusting?: To store a steel square and prevent it from rusting, you should follow a few simple steps: 1. Clean the steel square: Use a damp cloth or sponge to clean any dirt, debris, or grease from the steel square. Make sure to remove any moisture afterwards with a dry cloth to prevent water from causing rust. 2. Apply a protective coating: To provide an extra layer of protection against rust, you can apply a thin coat of oil or a rust-preventive spray. This helps to create a barrier between the steel and the air, preventing oxidation and rust formation. 3. Store in a dry location: Find a cool, dry place to store the steel square. Avoid areas with high humidity or moisture, such as basements or bathrooms. Moisture in the air can accelerate rusting, so it is essential to keep the storage environment dry. 4. Use a desiccant or moisture absorber: If you live in a particularly humid area or have concerns about moisture buildup, you can place a desiccant packet or a moisture absorber near the steel square. These products help to absorb any excess moisture in the air, reducing the risk of rust formation. 5. Avoid contact with other metals: When storing your steel square, make sure it does not come into contact with other metals, especially those prone to rusting. Different metals can create a galvanic reaction, accelerating rust formation. To prevent this, you can wrap the steel square in a soft cloth or store it in a protective case. By following these steps, you can effectively store a steel square and minimize the chances of rusting. Regularly inspect the square for any signs of rust or damage and reapply a protective coating if necessary.

Q:How do you use a steel square to determine angles for stair nosing?: To use a steel square for determining angles for stair nosing, place the square against the edge of the stair tread and nosing. Adjust the square until it aligns with the vertical riser and the horizontal tread. Once the square is properly positioned, read the angle measurement on the square's blade. This measurement can then be used to accurately cut the stair nosing at the correct angle for a precise fit.

Q:Can a steel square be used for checking the levelness of a miter saw base?: Indeed, the levelness of a miter saw base can be assessed using a steel square. This tool proves highly useful in verifying the accuracy and levelness of diverse surfaces, such as the base of a miter saw. By simply positioning the steel square against the miter saw base surface, it becomes effortless to determine its levelness. In the event that the saw base is not level, necessary adjustments can be executed to ensure the execution of precise and accurate cuts. Nevertheless, it is crucial to bear in mind that although a steel square can offer a rough approximation of the levelness, it may not match the precision achieved with a precision-leveling tool.

Q:How do you use a steel square to determine the angle of a spindle sanding cut?: Follow these steps to determine the angle of a spindle sanding cut using a steel square: 1. Position the steel square against the edge of a flat surface, like a workbench. 2. Align the leg of the steel square with the spindle sander. 3. Adjust the cutting angle of the spindle sander to your preference. This can be done by loosening the angle adjustment knob or lever and tilting it until it aligns with the steel square's leg. 4. Once the spindle sander is aligned, secure the desired cutting angle by tightening the angle adjustment knob or lever. 5. Use the steel square as a reference point to check if the spindle sander is at the correct angle for your sanding cut. Place the edge of the steel square against the spindle sander and visually confirm if the sander's angle aligns with the leg of the square. By utilizing a steel square in this manner, you can guarantee that your spindle sander is accurately set at the desired angle for consistent and precise sanding cuts.

Q:Can a steel square be used for checking the flatness of a countertop joint?: No, a steel square cannot be used for checking the flatness of a countertop joint. A steel square is a right-angle measuring tool primarily used for marking and checking squareness. It is not designed to accurately measure the flatness or levelness of a surface. To check the flatness of a countertop joint, a straightedge or a precision level would be more appropriate tools.

Q:Can a steel square be used for checking the squareness of furniture assemblies?: Yes, a steel square can be used for checking the squareness of furniture assemblies. A steel square, also known as a framing square or carpenter's square, is a versatile tool used in carpentry and woodworking to ensure accurate right angles and squareness. It has a right-angle shape, with one long arm and one shorter arm joined at a 90-degree angle. To check the squareness of furniture assemblies, the steel square can be placed against the corners or edges of the furniture piece. By aligning the long arm of the square with one side of the furniture and the shorter arm with the adjacent side, you can visually inspect if the two sides meet at a perfect right angle. If the furniture is square, the steel square's edges should align perfectly with the furniture's edges, indicating that the piece is properly assembled. Using a steel square is a quick and convenient method to ensure the squareness of furniture assemblies, especially for smaller or simpler pieces. However, for larger or more complex furniture items, additional measuring and leveling tools may be required to ensure precise squareness.

Q:What are the dimensions of a typical steel square?: A typical steel square usually has dimensions of 6 inches by 6 inches.

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