Material Composition
| Element | Typical Content (%) |
| Carbon | 0.15–0.25 |
| Manganese | 0.30–0.60 |
| Sulfur | ≤ 0.05 |
| Phosphorus | ≤ 0.05 |
| Iron | Balance |
Standards: Common standards include IS 2062 (India), ASTM A36 (USA), EN 10025 (Europe).
Mild Steel Angles
🔶 Description:
MS Angles are L-shaped cross-section steel sections, also called L angles or angle iron, with equal or unequal legs.
🔶 Types:
• Equal angles: Both legs have the same length (e.g., 50×50 mm)
• Unequal angles: One leg is longer (e.g., 75×50 mm)
🔶 Common Sizes:
• Widths: 25 mm × 25 mm to 200 mm × 200 mm
• Thickness: 3 mm to 20 mm
• Length: Standard 6m or 12m (customizable)
🔶 Applications:
• Structural framing
• Roof trusses and towers
• Base plates, brackets
• Shelving and storage racks
• Ladders, gates, fencing
🔶 Advantages:
• Excellent load-bearing capacity
• Easy to fabricate and weld
• Cost-effective
• High durability
Mild Steel Channels
🔶 Description:
MS Channels, also known as C-channels or U-channels, have a C-shaped cross-section with two flanges connected by a web.
🔶 Common Types:
• C-channel (standard)
• U-channel (with tapered flanges)
🔶 Common Sizes:
• Web height: 75 mm to 400 mm
• Flange width: 40 mm to 100 mm
• Thickness: 5 mm to 15 mm
• Length: Standard 6m or 12m
🔶 Applications:
• Support frames and joists
• Construction of purlins and trusses
• Trailers and truck bodies
• Machine bases and platforms
• Conveyor frames
🔶 Advantages:
• High strength-to-weight ratio
• Simple to cut, drill, weld
• Useful in load-bearing frameworks
• Long-lasting and easy to maintain
Manufacturing Process
- Steelmaking: Mild steel produced via Basic Oxygen Furnace or Electric Arc Furnace
- Hot Rolling: Billets rolled into desired shapes using roll-forming mills
- Cooling & Cutting: Rolled sections cooled and cut to standard/custom lengths
- Surface Finishing: Optional painting, galvanizing, or shot blasting
Surfaces Finishes
- Black (bare): Raw steel; needs coating for corrosion resistance
- Galvanized: Zinc-coated for rust prevention
- Painted: With red oxide or anti-corrosion primer
Comparison Table
| Feature | MS Angles | MS Channels |
| Shape | L-shaped (equal/unequal) | C or U-shaped |
| Load Direction | Good for corner bracing and vertical loads | Ideal for horizontal support and joists |
| Common Sizes | 25×25 mm to 200×200 mm | 75 mm to 400 mm web height |
| Applications | Frames, racks, trusses, fencing | Supports, truck frames, purlins |
| Strength | Moderate to high | High load-bearing in one direction |
| Workability | Excellent for welding and cutting | Excellent |
Limitation
- Corrosion prone if not coated
- Bending limitations under excessive lateral load
- Not suitable for very high-load industrial uses without reinforcement
Typical Standards
| Standard | Country | Description |
| IS 2062 | India | Hot-rolled mild steel sections |
| ASTM A36 | USA | Structural mild steel |
| BS EN 10025 | UK/Europe | Structural steel grade S275/S355 |
Summary
| Parameter | MS Angles | MS Channels |
| Material | Low-carbon mild steel | Low-carbon mild steel |
| Shapes | L-shape | C/U-shape |
| Strength | Moderate | High (in one plane) |
| Fabrication | Easy to cut, weld, bolt | Easy to fabricate |
| Applications | Structural support, fencing | Machine frames, purlins |
| Protection Needed | Paint, galvanize | Paint, galvanize |
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