Square Tube Weight per kg

In steel structures, construction engineering, machinery manufacturing, and steel export quotations, the weight of square tube (SHS steel) is a crucial fundamental issue. The weight directly impacts transportation costs, project costs, and loading schemes, and also relates to the load-bearing capacity calculation in structural design. Therefore, mastering accurate, authoritative, and verifiable square tube weights and calculation methods is essential for purchasers, engineers, and foreign trade professionals.

Square Tube Weight Calculation

In practical engineering and international trade, the most commonly used calculation formula is a simplified formula based on the theoretical density of steel, 7.85 g/cm³.

Commonly used quick calculation formula:

Square Tube Weight (kg/m) ≈ Side Length (mm) × 4 × Wall Thickness (mm) × 7.85 ÷ 1000

This formula applies to:

Ordinary carbon steel square tubes (Q235 / S235 / ASTM A500, etc.)

The wall thickness of square tubes is relatively thin (t ≤ 1/10 of the side length)

Suitable for engineering estimation, quotation, and quick calculation scenarios

Example:

The weight per meter of a 60*60*4mm square tube is calculated as follows:

(60×4×4)×7.85÷1000=7.02kg/m (rounded to two decimal places).

Other Factors Affecting Weight

1. Material Differences

Stainless steel has a slightly higher density (7.93g/cm³) than carbon steel, making square tubes of the same size heavier. The densities of square tubes of different materials are as follows:

Carbon steel: 7.85 g/cm³

Stainless steel (304): 7.93–8.00 g/cm³

Aluminum alloy: 2.70 g/cm³

Galvanized steel: 7.85 g/cm³

2. Non-standard Wall Thickness

For example, a 60*60*3.5mm square tube weighs approximately (60×4×3.5)×7.85÷1000≈6.16kg/m.

EN 10210: ±10%

ASTM A500: ±10%

3. Coating/Painting

Adding a zinc coating or powder coating will increase the weight by approximately 3%-8%.

Square Tube Weight in KG

Square Tubes Weight Capacity

The material, design, structure, and installation method of the steel tube all affect its load-bearing capacity. Therefore, the weight, size, wall thickness, and load-bearing capacity of a square tube are directly proportional.

FAQ

1. What is the unit of weight for square tubes?

Single piece/single meter: kg/m

Bulk: kg/ton

Price: USD/MT or USD/PCS

2. How to calculate the weight of square tubes of different materials?

Different materials of square tubing have different densities, therefore different density values need to be used when calculating weight. For example, the density of stainless steel is 8.0 g/cm³, and the density of aluminum alloy is 2.7 g/cm³.

Summary

In summary, the essence of weight calculation is square tube size × wall thickness × material density. In most engineering and foreign trade scenarios, the theoretical density of carbon steel (7.85 g/cm³) is sufficient for pricing, transportation, and cost accounting needs; however, in structural design, thick-walled square tubing, or high-strength applications, the complete section formula should be used in conjunction with the specific steel grade for calculation.