Square steel sizes of all kinds The size of square steel is very diverse and rich. Therefore, it is used flexibly in many projects and gradually becomes an indispensable material. So what are these specific sizes and how does it affect the specifications of this square steel? The answer will be in the article below by Bao Tin Steel.
What is square steel? Advantages of square steel
Square steel is a type of square steel with equal length and width, commonly used in industry and construction. Square steel box size from 12x12mm to 200x200mm, normal thickness from 0.6mm – 5.5mm. Thanks to the variety of sizes, it will help investors and construction contractors easily choose the right product for different large/small projects.

This square is divided into 2 main types: black square square steel and galvanized square steel box. Currently, this square steel is widely used thanks to the following outstanding advantages:
- Longlasting. The high carbon content in square steel will help prevent metal corrosion. The average life span is 40-50 years (depending on the working environment). For galvanized square steel, the life span is even longer than that of black square steel because the zinc coating on the steel surface helps protect against corrosion by factors (temperature, humidity, other environmental conditions, etc.).
- High durability. Square steel is produced according to modern technological lines, produced according to the standards of countries with developed industries (USA, Japan, UK, …). The applicable standards are ASTM, JIS, …
- Reasonable price. The production process of square steel is simpler than many other types of steel. In addition, the raw materials used to make the material are relatively easy to find. Therefore, the price of square steel is affordable and suitable for many customers.

Square steel size
This material is manufactured according to the following standards: JIS, ASTM A500, TCVN, ASTM A36,… With popular steel grades: TKR400, STKR490, S235, Q345A, Q235, S275, SS400, A36, A500 Gr.B/Gr.C,…
- Common square steel sizes: 12×12, 13×13, 14×14, 16×16, 20×20, 25×25, 30×30, 40×40, 50×50, 60×60, 90×90
- Large square steel sizes: 100×100, 125×125, 150×150, 175×175, 200×200, 250×250, 300×300
Standard square steel specifications table
| Size | Thickness | Kg/ 6m bar | |
|---|---|---|---|
| 12×12 | 0,5 | 1.07 | |
| 0,6 | 1,28 | ||
| 0,7 | 1,47 | ||
| 0,8 | 1,66 | ||
| 0,9 | 1,85 | ||
| 1,0 | 2,03 | ||
| 1,1 | 2,21 | ||
| 1,2 | 2,39 | ||
| 14×14 | 0,5 | 1,26 | |
| 0,6 | 1,5 | ||
| 0,7 | 1,74 | ||
| 0,8 | 1,97 | ||
| 0,9 | 2,19 | ||
| 1,0 | 2,41 | ||
| 1,1 | 2,63 | ||
| 1,2 | 2,84 | ||
| 1,4 | 3,25 | ||
| 20×20 | 0,6 | 2,18 | |
| 0,7 | 2,53 | ||
| 0,8 | 2,87 | ||
| 0,9 | 3,21 | ||
| 1,0 | 3,54 | ||
| 1,1 | 3,87 | ||
| 1,2 | 4,20 | ||
| 1,4 | 4,83 | ||
| 1,5 | 5,14 | ||
| 1,6 | 5,45 | ||
| 1,7 | 5,75 | ||
| 1,8 | 6,05 | ||
| 1,9 | 6,34 | ||
| 2,0 | 6,63 |

See more: Specifications and weight of square and rectangular steel
Large square steel specification table
| Size | Thickness | Kg/m |
|---|---|---|
| mm | mm | mm |
| 100×100 | 3,2 | 9,52 |
| 4,0 | 11,7 | |
| 4,5 | 13,1 | |
| 6,0 | 17,0 | |
| 9,0 | 24,1 | |
| 12,0 | 30,2 | |
| 125×125 | 3,2 | 12,0 |
| 4.5 | 16,6 | |
| 5,0 | 18,3 | |
| 6,0 | 21,7 | |
| 9,0 | 31,1 | |
| 12,0 | 39,7 | |
| 150×150 | 4,5 | 20,1 |
| 5,0 | 22,3 | |
| 6,0 | 26,4 | |
| 9,0 | 38,2 | |
| 12,0 | 49,1 | |
| 180×180 | 4,0 | 22,11 |
| 5,0 | 27,48 | |
| 6,0 | 32,78 | |
| 8,0 | 43,21 | |
| 10 | 53,38 | |
| 12 | 63,30 | |
| 200×200 | 4,5 | 27,2 |
| 6,0 | 35,8 | |
| 8,0 | 46,9 | |
| 9,0 | 52,3 | |
| 12,0 | 67,9 | |
| 300×300 | 6,0 | 54,7 |
| 9,0 | 80,6 | |
| 12,0 | 106 |

If above we classify square steel by size, we can also divide them based on the steel surface. Specifically, black square steel boxes and galvanized square steel. And the size of galvanized square steel boxes and black square steel also have thickness and mass as the table provided above.

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