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:Can a steel square be used for checking the squareness of a scroll saw table?: No, a steel square cannot be used for checking the squareness of a scroll saw table. A steel square is typically used for measuring and marking right angles on materials, but it is not designed to measure the precision of machinery or equipment like a scroll saw table.

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:What are the common materials used to make a steel square?: The common materials used to make a steel square are typically stainless steel, carbon steel, or tool steel. These materials are chosen for their strength, durability, and resistance to corrosion. Stainless steel is often preferred as it offers excellent resistance to rust and staining, making it ideal for outdoor use or in humid environments. Carbon steel is another commonly used material for steel squares due to its affordability and high tensile strength. Tool steel, which is a high-carbon alloy steel, is often used in specialized squares designed for precision measurements and heavy-duty applications. Overall, the choice of material depends on the intended use and the specific requirements of the steel square.

Q:What are some common measurements that can be taken with a steel square in electrical work?: Some common measurements that can be taken with a steel square in electrical work include: 1. Right angles: A steel square is often used to ensure that corners or junction boxes are square and properly aligned. This is crucial for accurate installation and alignment of electrical fixtures. 2. Angles: Steel squares can also be used to measure and mark angles, especially when cutting conduit or pipes. This helps ensure that bends and joints are accurately made, resulting in a proper fit. 3. Parallel lines: The straight edges of a steel square can be used to draw parallel lines, which is useful for marking and aligning electrical components such as switches, outlets, or circuit breakers. 4. Centering: Steel squares can assist in finding the center of a surface or object, which is helpful when installing light fixtures, ceiling fans, or other electrical devices that need to be centered. 5. Layout and marking: Steel squares are often used for marking lines, notches, or holes on electrical panels or enclosures. This helps electricians accurately place and install various components. Overall, a steel square is a versatile tool in electrical work, providing accurate measurements and ensuring proper alignment and installation of electrical components.

Q:How do you use a steel square to determine the slope of a driveway?: To determine the slope of a driveway using a steel square, place one edge of the square on the driveway surface and the other edge against a straight vertical object, such as a wall or a post. Then, use a level to ensure the square is level. Measure the distance between the bottom edge of the square and the ground at the end of the driveway. This measurement will indicate the rise or fall of the driveway over a specific distance, allowing you to calculate the slope.

Q:How does a steel square assist in determining the correct angle for a compound angle joint?: A steel square, also known as a framing square or carpenter's square, can assist in determining the correct angle for a compound angle joint by providing a reliable and accurate reference tool. When working on a compound angle joint, which involves two or more angled cuts, it is crucial to have the correct angle measurements to ensure a precise fit and a strong joint. A steel square typically consists of two arms, one longer and one shorter, forming a right angle. The longer arm, known as the blade, is marked with various scales and angle measurements. To determine the correct angle for a compound angle joint, the steel square can be used in the following ways: 1. Reference tool: The steel square serves as a reference tool to compare and measure angles. By aligning the blade of the square with one of the angled cuts, the angle can be read directly from the scale on the blade. This helps in determining the exact angle for the joint. 2. Transfer of angles: Once the angle of one cut is determined using the steel square, it can be transferred to the other piece of material. By placing the square against the material and aligning it with the measured angle, a line can be marked to indicate the correct angle for the second cut. This ensures that both pieces will fit together accurately. 3. Checking accuracy: The steel square can also be used to double-check the accuracy of the joint. By aligning the square with both angled cuts and ensuring that they match perfectly, any discrepancies can be identified and corrected before finalizing the joint. In summary, a steel square assists in determining the correct angle for a compound angle joint by providing a reliable reference tool for measuring angles, transferring angles to other pieces of material, and checking the accuracy of the joint. It helps ensure precision, accuracy, and a strong, well-fitting joint.

Q:What are some common measurements that can be taken with a steel square in HVAC work?: Some common measurements that can be taken with a steel square in HVAC work include determining right angles, marking straight lines, measuring angles, checking for level and plumb, and creating parallel lines.

Q:Can a steel square be used for plumbing work?: Yes, a steel square can be used for plumbing work. A steel square, also known as a framing square or a carpenter's square, is a versatile tool that can be used for a variety of tasks in the construction industry, including plumbing. While it may not be the most common tool used by plumbers, it can still be useful in certain situations. A steel square can be used to measure and mark angles, check for squareness, and layout straight lines. These functions can be helpful when working on plumbing projects that require precise measurements and alignments. For example, when installing pipes, a steel square can be used to ensure that the pipes are properly aligned at right angles. Additionally, a steel square can be used to make quick and accurate measurements for cutting and joining pipes. Its straight edges and measuring scales can provide accurate measurements, allowing plumbers to make precise cuts and connections. However, it is important to note that there are other tools specifically designed for plumbing work that may be more suitable for certain tasks. For example, a pipe wrench is commonly used to tighten and loosen pipes, while a pipe cutter is designed for cutting pipes efficiently. In conclusion, while a steel square may not be the most specialized tool for plumbing work, it can still be used effectively in certain situations. It can be helpful for measuring, marking, and layout tasks, as well as making accurate measurements for cutting and joining pipes.

Q:How do you use a steel square to measure the height of a wall opening?: Before measuring the height of a wall opening using a steel square, it is essential to verify that the steel square is perfectly squared, meaning that its edges form right angles. Once you have confirmed that the steel square is squared, proceed with the following steps: 1. Place the steel square against the wall, ensuring that the longer side is positioned vertically against the wall and the shorter side is placed horizontally at the bottom of the opening. 2. Adjust the position of the steel square by sliding it up or down until the shorter side aligns with the bottom of the wall opening. 3. Maintain a firm grip on the steel square to keep it securely against the wall. 4. Examine the graduations or markings on the vertical side of the steel square. These markings indicate the units of measurement, such as inches or centimeters. 5. Identify the graduation that corresponds with the top edge of the wall opening. This indicates the height of the opening. 6. Take note of the measurement displayed on the steel square, representing the height of the wall opening. It is crucial to remember to keep the steel square level and hold it firmly to prevent any movement that could affect the accuracy of the measurement. Additionally, ensure that you read the measurements correctly and double-check your calculations to guarantee precise results.

Q:How do you use a steel square for creating accurate bevel cuts?: Achieving precise bevel cuts requires following a series of steps when utilizing a steel square. To begin, it is crucial to guarantee that the steel square is clean and devoid of any dirt or debris that may impact its accuracy. Next, establish the desired angle for the bevel cut. This can be accomplished by either employing a protractor or referencing a bevel angle guide or template. Once the angle is determined, position the steel square on the material that is to be cut, aligning one edge of the square with the material's edge. Subsequently, utilize a pencil or scribe to mark a line along the edge of the steel square. This line will serve as a guide for the bevel cut's trajectory. After marking the line, carefully position the saw blade at the starting point of the line, ensuring that it aligns precisely with the marked path. Securely hold the steel square against the material, employing it as a guide, and initiate the bevel cut along the marked line, maintaining a steady hand and applying consistent pressure against the steel square to ensure accuracy. Upon completing the cut, verify the angle using a measuring tool to ensure it aligns with the desired bevel angle. By adhering to these steps and utilizing a steel square as a guide, precise bevel cuts can be accomplished with confidence and precision.

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