High Quality GB Standard Steel Square Bar 26mm-30mm

High Quality GB Standard Steel Square Bar 26mm-30mm System 1

High Quality GB Standard Steel Square Bar 26mm-30mm

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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: Are steel squares resistant to rust and corrosion?: Yes, steel squares are generally resistant to rust and corrosion due to their composition and protective coatings.

Q: What are some common uses for a steel square in construction?: A steel square, otherwise referred to as a framing square or carpenter square, serves as a versatile tool extensively utilized in construction for a multitude of purposes. Below are several typical applications of a steel square in construction: 1. Measurement and layout: Construction workers frequently employ a steel square to accurately measure and mark straight lines, right angles, and other angles. This allows for the precise layout and marking of dimensions on a wide array of materials, including wood, metal, and concrete. 2. Verification of squareness: A primary function of a steel square is to verify the squareness of corners and joints. By placing the square against the corner, it aids in determining whether the angle is precisely 90 degrees, guaranteeing meticulous and precise construction. 3. Angle cutting and marking: Steel squares are equipped with a protractor scale, enabling construction professionals to measure and mark angles other than 90 degrees. This proves particularly useful when cutting materials at specific angles, such as when crafting miter cuts or roof rafters. 4. Determination of roof pitches: Roofers employ steel squares to measure and ascertain roof pitches or slopes. By aligning the square with the roof's edge, they can calculate the angle and ensure the roof pitch is correct for adequate water drainage. 5. Guidance for circular saws and other power tools: Steel squares can serve as straight edge guides for circular saws, thereby ensuring precise cuts. By holding the square against the material and running the saw blade alongside it, construction professionals can achieve straight and accurate cuts. 6. Creation of parallel lines: Steel squares can be utilized to produce parallel lines on a variety of surfaces. By aligning the square's edge with a reference point and marking along the opposite side, construction workers can effortlessly draw or mark parallel lines on the material. 7. Verification and marking of stud locations: In framing or wall construction, steel squares prove to be useful tools for locating and marking stud positions. By utilizing the square's dimensions, construction professionals can measure and mark stud locations precisely, guaranteeing proper spacing and alignment. 8. Establishment of right angles: Steel squares are commonly employed to establish right angles during construction. They aid in ensuring that walls, frames, and other structures are correctly aligned and perpendicular, resulting in robust and stable construction. All in all, a steel square is an indispensable tool in construction due to its adaptability and precision. It empowers construction professionals to measure, layout, and mark various angles and dimensions, thereby ensuring accurate and high-quality construction projects.

Q: What are some common uses of a steel square in welding?: A steel square is commonly used in welding for various purposes such as measuring and marking angles, checking the accuracy of right angles, ensuring squareness of joints or corners, and aligning or setting up workpieces. It is a versatile tool that helps welders maintain precision and accuracy in their work.

Q: How do you use a steel square to measure and mark 150-degree angles?: To use a steel square to measure and mark 150-degree angles, you can follow these steps: 1. Begin by positioning the steel square on the surface or material where you want to measure the angle. Ensure that one of the edges of the square is aligned with the edge or line that you want to use as a reference. 2. Next, locate the 90-degree angle on the steel square. This is the right angle formed where the two arms of the square meet. 3. From the 90-degree angle, count 60 degrees in a clockwise direction. This can be done by using the markings on the square or by mental estimation, depending on the accuracy required. 4. Once you have reached the 150-degree mark on the steel square, use a pencil or marking tool to make a small mark at the intersection of the 150-degree line and the reference line or edge. 5. To double-check the accuracy of your measurement, you can use a protractor or another measuring tool specifically designed for measuring angles. This will help ensure that the 150-degree angle is correctly marked. Remember to always handle the steel square with care and accuracy while measuring and marking angles.

Q: How do you use a steel square to determine angles for wainscoting?: To use a steel square to determine angles for wainscoting, start by placing the square flat against the wall and aligning one edge with the baseboard. Then, rotate the square until the other edge aligns with the desired angle for the wainscoting. Once the square is in the correct position, mark the angle on the wall using a pencil or a small level. This marked angle will serve as a guide for cutting the wainscoting pieces at the correct angle before installation.

Q: Can a steel square be used for cutting or shaping materials?: Yes, a steel square can be used for cutting or shaping materials. While its main purpose is for measuring and checking right angles, the straight edges and corners of a steel square can also be used as a guide for cutting or shaping materials such as wood, metal, or plastic. The steel square provides a sturdy and precise reference point, ensuring accurate cuts or shapes. However, it is important to note that the steel square itself is not a cutting tool, but rather a tool that assists in maintaining straight lines and right angles during the cutting or shaping process.

Q: How do you use a steel square for marking crown molding angles?: In order to mark crown molding angles with a steel square, there are a few steps that need to be followed: 1. Begin by ensuring that the steel square is clean and free of any debris or rust. This will guarantee precise measurements and markings. 2. Measure the width of the crown molding using a tape measure. This measurement will determine where the square should be positioned on the molding. 3. Place the steel square against the edge of the crown molding, aligning it with the width measurement you obtained earlier. Make sure that the square is firmly pressed against the molding. 4. Employ a pencil to indicate the angle on the crown molding. The position of the square against the molding will determine the angle. 5. Repeat this process for each piece of crown molding that requires marking. 6. Once all the angles have been marked, proceed to cut the crown molding using either a miter saw or a hand saw, following the marked lines. It is crucial to note that using a steel square for marking crown molding angles necessitates accuracy and precision. Take sufficient time to ensure that the square is properly aligned, and double-check your measurements and markings before cutting the molding. Practice and experience will also enhance your proficiency in utilizing a steel square for this purpose.

Q: How do you use a steel square to create a 45-degree angle?: To use a steel square to create a 45-degree angle, you can follow these steps: 1. Start by placing the steel square on a flat surface or workbench, ensuring that it is properly aligned and straight. 2. Take a ruler or measuring tape and mark a point on the edge of the workpiece where you want the 45-degree angle to begin. 3. Next, draw a line extending from this point using a pencil or marking knife. This line will serve as a reference for your angle. 4. Align the steel square with the marked line, ensuring that the edge of the square is perfectly aligned with the line. 5. Now, pivot the steel square while keeping the edge aligned with the marked line until the opposite edge of the square intersects the line at a 45-degree angle. 6. Once you have achieved the desired angle, hold the steel square firmly in place to prevent any movement. 7. Finally, using a pencil or marking knife, trace along the edge of the steel square to transfer the 45-degree angle onto your workpiece. By following these steps, you can easily use a steel square to create a precise 45-degree angle on your workpiece. It is essential to ensure that your steel square is accurate and properly aligned to guarantee accurate results.

Q: Can a steel square be used for measuring the height of a ladder?: Using a steel square for measuring the height of a ladder is not feasible. A steel square, which is also called a framing square or carpenter's square, is mainly employed in carpentry and woodworking to take measurements and mark lines. It comprises a 90-degree angle and a shorter 45-degree angle. Although it is adaptable, it is not intended for measuring vertical distances such as ladder height. To determine the height of a ladder, it is customary to use a tape measure or a specialized extendable measuring rod created explicitly for this task.

Q: How do you use a steel square to determine the center of a circle?: To use a steel square to determine the center of a circle, place the square on the circle so that the edges of the square intersect the circle at two points. Then, draw a line connecting these two points on the circle. Repeat this process with another pair of intersecting points on the circle. The point where these two lines intersect is the center of the circle.

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