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: How do you use a steel square to ensure the correct angle for a lap joint?: To use a steel square to ensure the correct angle for a lap joint, follow the steps below: 1. First, determine the desired angle for the lap joint. This will depend on the specific project or design requirements. 2. Place one piece of the material that will be used for the lap joint on a flat surface. 3. Position the steel square on the edge of the material, with one arm of the square resting on the surface and the other arm extending vertically. 4. Adjust the angle of the square by rotating it until the desired angle for the lap joint is achieved. Ensure that the arms of the square are aligned with the edges of the material. 5. Once the correct angle is set, hold the square firmly in place with one hand. 6. Take the second piece of material that will be used for the lap joint and align its edge with the vertical arm of the steel square. 7. Carefully mark the angle on the second piece of material using a pencil or a marking tool. This will ensure that both pieces of material will be cut or joined at the correct angle for the lap joint. 8. Repeat this process for any additional lap joints that need to be made. By using a steel square in this manner, you can ensure the correct angle for a lap joint, which is crucial for creating strong and accurate connections between pieces of material.

Q: Can a steel square be used for measuring and marking compound miter cuts?: Yes, a steel square can be used for measuring and marking compound miter cuts. However, it may not be the most precise tool for this task. A combination square or a miter square would be more suitable for accurately measuring and marking compound miter cuts.

Q: What are some common techniques for using a steel square in stair building?: Using a steel square in stair building is essential for ensuring accuracy and precision in the construction process. Some common techniques for using a steel square in stair building include: 1. Determining the Rise and Run: The steel square can be used to measure and mark the rise (vertical height) and run (horizontal length) of each stair. By aligning the square with the stringer or riser board, you can easily mark the correct measurements for each step. 2. Laying Out Stringers: Stringers are the main support structures of a stair. The steel square can be used to lay out the exact dimensions and angles required for cutting the stringers. By using the square to measure and mark the rise and run, you can accurately transfer these measurements onto the stringers for cutting. 3. Checking for Squareness: A steel square is also useful for checking the squareness of the stair parts. By aligning the square with the edges and corners of the steps, you can ensure that everything is perfectly square and level. This is crucial for a safe and stable staircase. 4. Determining the Angle of the Stair Treads: The steel square can be used to determine the angle at which the stair treads need to be cut. By aligning the square with the stringer and the tread, you can measure and mark the correct angle for cutting the treads to fit properly. 5. Creating Templates: In complex stair designs, the steel square can be used to create templates for curved or irregularly shaped stair parts. By tracing the shape onto a piece of plywood or cardboard using the square as a guide, you can transfer the template onto the actual material for cutting and shaping accurately. Overall, the steel square is an indispensable tool in stair building, providing accurate measurements, ensuring squareness, and facilitating precise cuts. By using these common techniques, builders can create safe and well-constructed staircases.

Q: What are some common techniques for using a steel square in carpentry?: The steel square, widely employed in carpentry, is a versatile tool utilized for measuring, marking, and laying out angles. Below are several standard methods for employing a steel square in carpentry: 1. Squareness examination: One primary function of a steel square is to determine if a corner or joint is perfectly square. Position the square against the corner and assess whether both edges align with the adjacent surfaces. If they do, the corner is square. 2. Angle determination: Steel squares are ideal for measuring and marking angles in carpentry. The square typically features degree markings along its blade, enabling accurate angle measurement. For instance, if a 45-degree angle cut is required on a piece of wood, the square can be used to mark the angle and guide the saw. 3. Measurement transfer: Steel squares can be employed to transfer measurements from one surface to another. For example, if a line parallel to an existing edge needs to be marked, the square can be placed against the edge, and a line can be drawn along the blade of the square. 4. Perpendicular line creation: The 90-degree angle of the steel square is perfect for generating perpendicular lines. By aligning the square against an edge, a line perpendicular to that edge can be easily drawn. 5. Rafter length determination: When constructing roofs, carpenters often utilize steel squares to calculate rafter lengths. By employing the square's various measurements and formulas, the required length and angles for rafters can be determined. 6. Miter cut setup: Steel squares are invaluable for setting up miter cuts in trim work. By utilizing the square's angle markings, precise measurements and markings for desired angles can be made, ensuring accurate cuts. 7. Level and plumb verification: Steel squares can also be employed to check if something is level or plumb. By placing the square against a vertical or horizontal surface, it can be determined if it is perfectly vertical or horizontal. These are merely a few of the many techniques frequently employed with a steel square in carpentry. With its versatility and precision, the steel square is an essential tool for any carpenter.

Q: Can a steel square be used for measuring distances?: No, a steel square cannot be used for measuring distances as it is primarily a tool for measuring and marking right angles in woodworking and carpentry.

Q: Can a steel square be used for measuring angles in metal roofing?: Indeed, angles in metal roofing can be measured using a steel square. This versatile tool, known as a framing square or carpenter's square, is commonly utilized in construction and carpentry. With its right angle shape and steel composition, it is aptly named. To measure angles in metal roofing, the steel square can be employed in varying ways. One approach involves positioning the square against the edge of the metal roof sheet and aligning it to the desired angle. The opposite side of the square can then serve as a guide to accurately mark the angle on the metal sheet. Another technique involves utilizing the square as a protractor. By placing the longer side of the square along the metal sheet's edge and rotating it until the desired angle is achieved, the angle can be measured using the square's markings. It is crucial to acknowledge that while a steel square can be used for measuring angles in metal roofing, it may not offer the utmost precision for this purpose. For more precise measurements, specialized tools like a protractor or angle finder may be more suitable. Moreover, it is always advisable to consult professional guidelines and instructions specific to metal roofing installations to ensure precise measurements and proper installation techniques.

Q: How do you use a steel square to measure angles?: To use a steel square for measuring angles, you can follow these steps: 1. Ensure that the steel square is clean and free from any dirt or debris that may affect the accuracy of your measurements. 2. Identify the angle that you want to measure. The steel square typically has two arms, a longer one called the blade and a shorter one called the tongue. 3. Place the steel square on a flat surface, ensuring that the blade is aligned with one side of the angle you want to measure. 4. Rotate the square until the tongue aligns with the other side of the angle. Make sure that both arms of the square are in contact with the surface and the sides of the angle. 5. Once the steel square is properly aligned, read the angle measurement from the scale engraved on the blade or tongue. The scale usually provides measurements in degrees, with markings at regular intervals. 6. Take note of the angle measurement and record it for future reference or use. It is important to handle the steel square with care to avoid any damage that might affect the accuracy of its measurements. Regularly check and calibrate your steel square if necessary to ensure precise and reliable angle measurements.

Q: Can a steel square be used for checking the levelness of a shelf?: No, a steel square cannot be used for checking the levelness of a shelf. It is primarily used for measuring angles and marking straight lines in carpentry work. To check the levelness of a shelf, a level tool should be used.

Q: Can a steel square be used for checking the squareness of cabinet drawers?: No, a steel square is not suitable for checking the squareness of cabinet drawers as it is primarily used for measuring and marking right angles in construction and carpentry. For cabinet drawers, a precision square or a combination square would be more appropriate to ensure accurate measurements and squareness.

Q: What are the markings and graduations on a steel square used for?: The markings and graduations on a steel square are used for a variety of purposes in carpentry and other related fields. Firstly, the markings are used to measure and mark specific lengths on the material being worked on. The square typically has both imperial and metric measurements, allowing for precise and accurate measurements in either system. These markings help ensure that cuts and joints are made at the correct dimensions, resulting in a more precise and professional finish. Additionally, the graduations on a steel square are used for angle measurements. The square typically has a protractor scale, which allows for the measurement of angles from 0 to 180 degrees. This is particularly useful for tasks such as creating angled cuts or marking out specific angles for joinery work. Furthermore, the square often has additional markings and features that aid in various tasks. For example, it may have a scale for finding the center of a circle or a ruler edge for quick measurements. Some squares also have scribe lines, which can be used to mark parallel lines or reference points. Overall, the markings and graduations on a steel square are essential tools for accurate measurements, angle markings, and various other tasks in carpentry and related fields. They help ensure precision and efficiency, resulting in better quality workmanship.

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