What is MS Square Pipe?
MS Square Pipe is a hollow structural section made from mild steel (low carbon steel 0.05%–0.25%) with a square cross-section. It is widely used in construction, fabrication, gates, railings, sheds, frames, and industrial structures because of its strength, uniform shape, and easy welding properties.
It is also called:
SHS (Square Hollow Section)
MS Square Tube
Structural Square Pipe
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.05 – 0.25% |
| Manganese (Mn) | 0.30 – 0.60% |
| Silicon (Si) | 0.10 – 0.35% |
| Sulfur (S) | ≤ 0.05% |
| Phosphorus (P) | ≤ 0.04% |
| Iron (Fe) | Balance |
Low carbon makes it:
✔ Easy to weld
✔ Easy to bend
✔ Cost-effective
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 410 – 550 MPa |
| Yield Strength | 240 – 350 MPa |
| Density | 7,850 kg/m³ |
| Elongation | 20 – 25% |
| Modulus of Elasticity | 200 GPa |
Standard Sizes (Common Indian Market Sizes)
Outer Dimension (A × A)
| Size (mm) | Common Thickness (mm) |
|---|---|
| 20 × 20 | 1.2 – 2.0 |
| 25 × 25 | 1.2 – 2.5 |
| 32 × 32 | 1.6 – 3.0 |
| 40 × 40 | 1.6 – 3.0 |
| 50 × 50 | 1.6 – 4.0 |
| 75 × 75 | 2.0 – 4.5 |
| 100 × 100 | 2.5 – 6.0 |