High Quality GB Standard Steel Square Bar 63mm-80mm

High Quality GB Standard Steel Square Bar 63mm-80mm System 1

High Quality GB Standard Steel Square Bar 63mm-80mm

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t

Supply Capability:: 10000 m.t/month

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Product Description:

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
GB	Q195	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
GB	Q235B	0.12~0.20	0.30~0.70	≤0.045	≤0.045	≤0.30

Measures and Tolerances of Square Steel Bar:

Section 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
Length of a side(mm)	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.

Q:What is the purpose of the tongue and groove on a steel square?: The purpose of the tongue and groove on a steel square is to provide a secure and precise connection between the blade and the handle. This design feature ensures stability and accuracy when measuring and marking angles, making the steel square a reliable tool for various construction and woodworking tasks.

Q:Can a steel square be used for measuring the thickness of glass?: No, a steel square cannot be used for measuring the thickness of glass. A steel square is a tool typically used in carpentry and woodworking to measure angles and ensure accurate right angles. It is not designed or suitable for measuring the thickness of glass. To measure the thickness of glass, specialized tools such as calipers or micrometers are typically used, which provide precise measurements.

Q:How do you use a steel square to find the center of a board?: To use a steel square to find the center of a board, you can follow these steps: 1. Place the steel square on one end of the board, aligning the long side of the square with the edge of the board. 2. Make sure the square is perfectly perpendicular to the edge of the board. 3. Mark a reference line on the board along the long side of the square. 4. Without moving the square, place the opposite end of the steel square against the reference line you just marked. 5. Slide the square along the reference line until the short side of the square intersects with the other edge of the board. 6. Mark another reference line on the board along the short side of the square. 7. Without moving the square, place the opposite end of the steel square against the new reference line you just marked. 8. Slide the square along the reference line until the long side of the square intersects with the first edge of the board. 9. Mark a final reference line on the board along the long side of the square. 10. The point where the three reference lines intersect is the center of the board. Using a steel square helps ensure accurate measurements and straight lines, making it an effective tool for finding the center of a board.

Q:Can a steel square be used for checking the alignment of a jointer table?: Yes, a steel square can be used for checking the alignment of a jointer table. A steel square is a versatile tool that can be used for various woodworking tasks, including checking the alignment of machinery. To check the alignment of a jointer table, you can place the steel square against the jointer's fence and table, ensuring that it is perfectly perpendicular. This will help you determine if the jointer table is properly aligned and if any adjustments need to be made. It is important to use a high-quality steel square that is accurate and reliable for accurate results.

Q:Can a steel square be used as a makeshift protractor?: No, a steel square cannot be used as a makeshift protractor. Steel squares are specifically designed for measuring right angles and are not suitable for measuring angles other than 90 degrees. A protractor, on the other hand, is designed specifically for measuring and drawing angles accurately.

Q:How do you use a steel square to determine the angle of a rip cut?: To use a steel square to determine the angle of a rip cut, you will need to follow these steps: 1. Begin by placing the steel square against the edge of the board you want to cut, making sure it is flush and square. 2. Next, locate the scale on the steel square that represents degrees or angles. This is usually found on the outer edge of the square. 3. Align the scale with the edge of the board, ensuring that the blade of the square is perpendicular to the board's edge. 4. Once the square is aligned, look for the number on the scale that indicates the angle you want to cut. For example, if you need a 45-degree rip cut, locate the corresponding mark on the scale. 5. Once you have found the correct angle, mark the board along the blade of the steel square. This will indicate where the cut should be made. 6. Finally, use a saw or other cutting tool to follow the marked line and make the rip cut at the desired angle. Remember to always double-check your measurements and ensure the steel square is properly aligned before making any cuts. Using a steel square can help you achieve accurate and precise rip cuts by providing a reliable reference for determining the angle.

Q:Can a steel square be used for insulation installation?: Using a steel square for insulation installation is not possible. Steel squares are commonly utilized in construction and woodworking to measure and indicate right angles. However, insulation installation necessitates materials that can offer thermal resistance, such as fiberglass, foam board, or mineral wool. These materials are specifically engineered to capture air and hinder heat transfer, a capability that steel squares lack. Consequently, it is crucial to employ suitable insulation materials for a successful installation.

Q:How do you use a steel square for creating chamfered edges?: To use a steel square for creating chamfered edges, you first need to understand what a chamfer is. A chamfer is a beveled edge that is created by removing a small portion of material from the corner or edge of a workpiece. This is often done to prevent sharp edges, improve aesthetics, or facilitate assembly. To begin, ensure that you have a steel square, which is a tool consisting of a long metal blade with a perpendicular handle. The blade is marked with measurements and angles, making it useful for accurate layout and marking. Here are the steps to create chamfered edges using a steel square: 1. Measure and mark the desired distance from the corner or edge where you want to create the chamfer. This can be done using the measurements on the steel square, aligning it with the workpiece's edge. 2. Hold the steel square firmly against the workpiece, ensuring that the blade is aligned with the marked line. The handle should be perpendicular to the workpiece's surface. 3. Once the steel square is properly aligned, use a pencil or a marker to trace along the edge of the blade onto the workpiece. This will transfer the desired chamfer line onto the material. 4. Repeat this process on all sides or corners where chamfers are required. 5. Once the chamfer lines are marked, you can use various tools like a chisel, file, or a power tool (such as a router or a chamfer bit) to remove the material along the marked lines. Be sure to follow the line accurately and remove material gradually to achieve the desired chamfer. 6. After removing the material, check the chamfered edges for accuracy and smoothness. Make any necessary adjustments or refinements if needed. Remember to wear appropriate safety gear, such as safety goggles and gloves, when working with tools and materials to prevent any injuries.

Q:How do you use a steel square for creating precise dado cuts?: To use a steel square for creating precise dado cuts, you need to follow a few steps. First, ensure that your steel square is clean and free from any rust or debris that could affect its accuracy. Next, mark the precise location of the dado cut on your workpiece using a pencil or marking knife. Make sure to measure and mark the width and depth of the dado accurately. Now, place the steel square on the marked line, aligning one edge of the square with the edge of your workpiece. Ensure that the square is held firmly against the workpiece to prevent any movement. With the steel square in position, use a sharp utility knife or chisel to score along the edge of the square, marking the entire length of the dado. This scoring helps define the boundaries of the dado and provides a guide for the subsequent steps. Once the scoring is complete, remove the steel square and use a saw or router to cut along the scored line, ensuring that the blade or bit stays within the marked boundaries. Take your time and make slow, controlled cuts to maintain precision. After the dado has been cut, use a chisel or router to remove any excess material within the dado, ensuring that it matches the desired width and depth. You can use the steel square again to check the accuracy of the final cut. Remember to always prioritize safety when working with tools and follow the manufacturer's instructions for the specific tools you are using. Practice and patience are essential in achieving precise dado cuts, so don't rush the process and take your time to ensure accuracy.

Q:What are some common mistakes to avoid when reading measurements on a steel square?: When reading measurements on a steel square, there are a few common mistakes that can be easily avoided. Firstly, one should ensure that the square is placed correctly on the object being measured. It should be aligned properly and firmly against the edges to obtain accurate measurements. Another mistake to avoid is misinterpreting the markings on the steel square. These squares often have multiple scales and markings, including inches, centimeters, angles, and more. It is crucial to identify and use the correct scale for the measurement you require, as using the wrong scale can lead to inaccurate readings. Moreover, it is essential to read the measurements precisely by aligning your eyes directly with the markings. Parallax error can occur when the eye is not level with the scale, causing measurements to be inaccurate. Therefore, always position yourself at eye level with the markings to avoid this mistake. Additionally, it is important to take note of any zero-point errors. Ensure that the square is properly calibrated, and the zero point is aligned correctly with the edge of the object being measured. If the zero point is not aligned accurately, it can lead to incorrect measurements. Lastly, it is advisable to double-check the measurements to avoid any mistakes. Use a measuring tape or another tool to verify the accuracy of the readings obtained from the steel square. This double-checking process can help in identifying any errors or inconsistencies in the measurements, ensuring greater precision. By being mindful of these common mistakes - incorrect placement, misinterpretation of markings, parallax error, zero-point errors, and lack of double-checking - one can avoid errors and achieve accurate measurements when using a steel square.

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