High Quality GB Standard Steel Square Bar 48mm-60mm

High Quality GB Standard Steel Square Bar 48mm-60mm System 1

High Quality GB Standard Steel Square Bar 48mm-60mm

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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:Can a steel square be used for marking out bridle joints?: Certainly! Here's a rephrased version: Indeed, bridle joints can be marked out using a steel square. In woodworking, a steel square is an enduring and adaptable tool widely utilized for measuring and delineating angles and lines. In the case of marking out bridle joints, which involve one piece of wood having a groove or open mortise and the other piece having a corresponding tenon or tongue, a steel square can prove incredibly valuable. By utilizing the square to ensure precise measurements and accurate right angles, woodworkers can effectively mark the necessary cuts and align the wood pieces for a successful bridle joint. Nevertheless, it's crucial to acknowledge that while a steel square is an invaluable tool for marking out bridle joints, it might not be the sole tool needed. Often, other tools such as a marking knife, chisels, and a mallet are necessary to complete the joint.

Q:How do you use a steel square to determine the pitch of a roof?: In order to determine the pitch of a roof using a steel square, it is necessary to follow the following steps: 1. Begin by positioning the steel square on the roof surface. Place the long side of the square against the roof surface, with one of the shorter sides extending vertically. 2. Ensure that the square is level by utilizing a bubble level or visually aligning it with the horizontal reference point on the roof. 3. Once the square is level, obtain a measurement on the vertical side of the square. This measurement represents the rise, which is the vertical distance from the horizontal reference point to the highest point of the roof. 4. Proceed to take a measurement on the horizontal side of the square. This measurement represents the run, which is the horizontal distance from the highest point of the roof to the horizontal reference point. 5. Finally, utilize these measurements to calculate the pitch of the roof. The pitch is typically expressed as a ratio of rise over run. For example, if the rise is 6 inches and the run is 12 inches, the pitch would be 6:12 or simplified to 1:2. By utilizing a steel square and measuring the rise and run, it is possible to accurately ascertain the pitch of a roof. This information is crucial for a variety of construction and roofing projects as it aids in estimating materials, planning drainage systems, and ensuring proper installation.

Q:How do you use a steel square to mark out 20-degree angles?: In order to mark out a 20-degree angle using a steel square, it is necessary to follow these instructions: 1. Ensure that the steel square is properly aligned and secured by placing it on a flat surface. 2. Identify the L-shaped corner of the steel square where the longer and shorter sides meet; this is the 90-degree angle. 3. Locate the 45-degree angle on the longer side of the square, usually marked close to the 90-degree angle. 4. Position the steel square with the 90-degree angle facing towards you in order to find the 20-degree angle. 5. Starting from the 45-degree angle, count towards the shorter side of the square, measuring a distance less than halfway between the 45-degree and 90-degree angles. 6. Mark a point on the shorter side of the square at this measured distance. 7. Align a straight edge or ruler with the marked point and the 90-degree angle on the square. 8. Draw a line connecting the marked point on the square and the straight edge/ruler, extending it beyond the square. 9. This line will create a 20-degree angle with the square, allowing you to accurately mark the desired angle on your workpiece. Always remember to double-check your measurements and use a reliable protractor or angle gauge to ensure the accuracy of your marked angles.

Q:How do you use a steel square to mark a line parallel to an edge?: To use a steel square to mark a line parallel to an edge, follow these steps: 1. Place the steel square on the surface with one side resting against the edge that you want to mark parallel to. 2. Ensure that the square is aligned properly and sits flush against the edge. 3. Hold the square firmly in place to prevent it from shifting. 4. Use a pencil or a scribe to draw a line along the edge of the steel square. 5. Continue marking the line until you reach your desired length. Remember to check the square periodically to ensure it hasn't moved or shifted while marking the line. Additionally, it is recommended to use a sharp pencil or scribe to ensure accurate markings.

Q:How do you use a steel square to measure the height of a door opening?: To use a steel square to measure the height of a door opening, follow these steps: 1. Hold the steel square vertically against the side of the door opening, ensuring that the long side of the square is flush against the door frame. 2. Make sure the square is positioned in a way that one of its edges is aligned with the floor or any other reference point you wish to use as a starting point. 3. Slide the square upwards along the door frame until the other edge of the square reaches the top of the door opening. 4. Once the square is in position, look at the markings on the square's vertical edge. These markings indicate measurements in inches or centimeters. 5. Take note of the measurement where the top edge of the door opening aligns with the square. This measurement represents the height of the door opening. 6. Repeat the process on the opposite side of the door opening to ensure accuracy. If the measurements vary slightly, take the average of the two for a more precise result. Using a steel square to measure the height of a door opening is a simple and effective method that provides accurate measurements for various purposes, such as installing a new door or ordering a customized one.

Q:Can a steel square be used for measuring angles in tile work?: Yes, a steel square can be used for measuring angles in tile work. Steel squares have a 90-degree angle that can serve as a reference point for measuring and marking angles accurately. However, it may not be as precise for measuring smaller or more complex angles compared to specialized tools like a protractor or angle finder.

Q:Can a steel square be used for checking the squareness of a door frame opening?: A door frame opening can be checked for squareness using a steel square. The steel square, also called a framing square or carpenter's square, is a versatile tool commonly used in carpentry and construction. It has a shape of a right angle, with one arm longer than the other, making it suitable for measuring angles and checking the squareness of objects. To check the squareness of a door frame opening, position the steel square against the inside corner of the frame. Ensure that the long arm aligns with one side of the frame, while the shorter arm aligns with the other side. If the frame is perfectly square, the edges of the square will fit perfectly against both sides of the frame. However, if the frame is not square, there will be a gap between the square and one or both sides of the frame, indicating the need for adjustments. Using a steel square is a reliable and precise way to check the squareness of a door frame opening. It enables the identification of any discrepancies and allows for necessary adjustments to be made, ensuring proper fit and functionality of the door.

Q:How do you use a steel square to determine the slope of a sidewalk?: To determine the slope of a sidewalk using a steel square, you would place one end of the square on the sidewalk and extend it towards the other end. By using a level or measuring the difference in height between the ends of the square, you can calculate the slope of the sidewalk.

Q:Can a steel square be used for laying out a fence?: Yes, a steel square can be used for laying out a fence.

Q:Can a steel square be used for marking out lap joints?: Absolutely, lap joints can be easily marked out using a steel square. Carpenters and woodworkers frequently rely on the versatility of this tool for measuring and indicating right angles. In the realm of woodworking, lap joints are commonly utilized, and a steel square serves as a precise instrument to mark the exact spots where the two wooden pieces will intersect. By aligning the square with the wood's edges, you guarantee a precise marking and cutting process, ultimately leading to a snug and flawless fit. The steel square acts as a dependable and precise reference point for marking out lap joints, making it an indispensable tool in this regard.

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