• 15mm*1.77kg/m square bar for construction System 1
  • 15mm*1.77kg/m square bar for construction System 2
  • 15mm*1.77kg/m square bar for construction System 3
15mm*1.77kg/m square bar for construction

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 (%)

 

Mn

 

(%)

 

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

 

22

 

Q215

 

0.09-0.15

 

0.3

 

0.25-0.55

 

0.45

 

0.5

 

215

 

335

 

22

 

Q235

 

0.12-0.22

 

0.3

 

0.3-0.7

 

0.45

 

0.45

 

235

 

375

 

20

 

Q345

 

0.20

 

0.55

 

1.0-1.6

 

0.45

 

0.45

 

345

 

510

 

21

 

 

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 find the height of a wall?
To use a steel square to find the height of a wall, you can follow these steps: 1. Ensure that the base of the wall is level and the steel square is perpendicular to the ground. 2. Hold the steel square against the wall with one of its legs touching the ground. 3. Slide the square upwards along the wall until the other leg is touching the top edge of the wall. 4. While keeping the square in place, mark the point where the top leg of the square intersects the wall. 5. Measure the distance from the ground to the marked point, and that will give you the height of the wall.
Q: How do you store a steel square to prevent damage?
To store a steel square and prevent damage, there are a few key steps you can follow. Firstly, it is important to clean the steel square thoroughly to remove any dirt, dust, or debris that may cause scratches or rust. Use a clean cloth or paper towel to wipe it down and ensure it is dry before proceeding. Next, you should apply a thin layer of protective oil or grease to the steel square. This will help create a barrier against moisture and prevent rust formation. Be sure to use a rust-preventive product specifically designed for steel or metal surfaces. Apply the oil or grease evenly across all surfaces of the steel square, including the blade, handle, and any exposed edges. Once the protective coating is applied, it is recommended to wrap the steel square in a soft cloth or towel. This will provide an extra layer of cushioning and protection against accidental impacts or scratches. Make sure the cloth is clean and free from any abrasive materials that could damage the steel square. Finally, choose an appropriate storage location for the steel square. Ideally, it should be stored in a dry area with controlled humidity to minimize the risk of rust formation. Avoid storing it in areas prone to moisture, such as basements or areas with high humidity levels. Additionally, try to keep it away from other tools or objects that could potentially scratch or damage the steel square. By following these steps, you can protect your steel square from damage and ensure its longevity. Regularly inspect and maintain the protective coating to keep it in optimal condition, and your steel square will be ready for use whenever needed.
Q: How do you use a steel square for creating precise miter joints?
To use a steel square for creating precise miter joints, follow these steps: 1. Start by selecting a steel square that is accurately calibrated and has clear markings. Ensure that it is in good condition and free from any rust or damage. 2. Measure and mark the desired angles for your miter joints on the pieces of wood you are working with. Miter joints are typically cut at a 45-degree angle, but this may vary depending on your project. 3. Lay the steel square on the edge of one of the pieces of wood, aligning the edge of the square with the marked line for the miter joint. 4. Hold the square firmly against the wood and use a pencil or a marking knife to mark the cut line along the edge of the square. Ensure that the marking is clear and accurate. 5. Repeat the process on the other piece of wood, making sure both pieces are marked correctly and aligned properly. 6. Once the marking is complete, use a miter saw or a hand saw to cut along the marked lines. Take your time and make precise cuts to ensure a tight and accurate miter joint. 7. After cutting, test-fit the two pieces of wood together to check the accuracy of the miter joint. If necessary, make any adjustments or refinements to achieve a perfect fit. Using a steel square for creating precise miter joints is a straightforward process that requires careful measurement, marking, and accurate cutting. By following these steps and paying attention to detail, you can achieve clean and seamless miter joints for your woodworking projects.
Q: How do you use a steel square to determine the slope of a deck surface?
To determine the slope of a deck surface using a steel square, you can place one side of the square on the deck surface and adjust the other side until it is level. By measuring the distance between the level side of the square and the deck surface at different points, you can determine the slope of the deck.
Q: How do you use a steel square to determine the angle of a compound roundover cut?
Follow these steps to determine the angle of a compound roundover cut using a steel square: 1. Identify the two surfaces that will be connected by the compound roundover cut, referring to them as Surface A and Surface B. 2. Place the steel square on Surface A, aligning one edge of the square with the surface's edge. Make sure the square is perpendicular to Surface A. 3. Extend Surface B towards the steel square, ensuring it overlaps with the blade of the square. 4. Take note of the intersection point between the blade of the steel square and Surface B. This point represents the angle at which the compound roundover cut needs to be made. 5. Measure the angle formed at the intersection point using a protractor or a digital angle finder. Record the measurement. 6. Transfer the angle measurement onto your workpiece by either marking it directly or replicating it with a bevel gauge. 7. Before proceeding with the compound roundover cut, double-check the accuracy of the angle measurement. Make adjustments to the square or re-measure if necessary. By utilizing a steel square in this manner, you can accurately determine the angle of a compound roundover cut, ensuring precise results in your woodworking or carpentry projects.
Q: How do you use a steel square to determine the angle of a compound miter bevel cut?
To determine the angle of a compound miter bevel cut using a steel square, you can follow these steps: 1. Place the steel square on the edge of the material you want to cut, with one arm of the square against the surface and the other arm extending outward. 2. Adjust the angle of the steel square until the surface arm aligns with the direction of the bevel cut you want to make. 3. Once properly aligned, read the angle measurement on the scale of the steel square where the other arm intersects. 4. This angle measurement will give you the angle of the compound miter bevel cut you need to set on your saw.
Q: How do you use a steel square to measure and mark 326.25-degree angles?
To use a steel square to measure and mark 326.25-degree angles, you would follow these steps: 1. Place the steel square on a flat surface or the material you want to mark the angle on. 2. Align the long edge of the square with the reference line or edge that you want to measure from. 3. Look for the degree markings on the square. These markings are usually found on the long edge or the inner side of the square. 4. Start from 0 degrees and follow the degree markings until you reach 326.25 degrees. The markings may be spaced at regular intervals, so you may need to estimate or interpolate to find the exact measurement. 5. Once you have located the 326.25-degree marking, use a pencil or marker to make a small mark on the material you are working with. You can use the square as a guide to ensure the mark is straight and accurate. 6. If you need to draw a line or create a longer mark, you can use the long edge of the square as a straightedge to extend the mark in the desired direction. Remember to handle the steel square carefully and ensure it remains stable while measuring and marking the angle.
Q: Can a steel square be used for chair rail installation?
Certainly! Chair rail installation can indeed make use of a steel square. This tool, frequently employed in carpentry and woodworking endeavors, boasts remarkable versatility. It accurately measures and marks angles, lines, and lengths. Employing a steel square guarantees flawless cuts and angles for chair rail sections. Additionally, it aids in ascertaining the ideal height and positioning of the rail on the wall. While alternative tools exist for chair rail installation, the efficacy of a steel square remains unparalleled.
Q: Can a steel square be used for checking the squareness of a jigsaw blade?
No, a steel square cannot be used for checking the squareness of a jigsaw blade. A jigsaw blade needs to be checked for squareness using specialized tools such as a square or a squareness gauge designed specifically for jigsaw blades.
Q: Can a steel square be used for furniture-making projects?
Yes, a steel square can be used for furniture-making projects. Steel squares are versatile and durable tools that can be used for measuring, marking, and checking angles in woodworking projects. They provide accurate and precise measurements, ensuring the furniture pieces are built with precision and accuracy.

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