Difference Between Mild Steel Plate and Boiler Plate in Ghaziabad
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March 6, 2025
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March 7, 2025
Difference Between Mild Steel Plate and Boiler Plate
Steel is one of the most commonly used materials in various industries, and different types of steel plates are used based on their specific applications. Two widely used types of steel plates are Mild Steel Plate and Boiler Plate. While both serve essential roles in construction and industrial applications, they differ in composition, mechanical properties, and applications.
This article explains the difference between mild steel plate and boiler plate, including their chemical properties, mechanical properties, and specifications.
What is Mild Steel Plate?
Mild Steel Plate is a low-carbon steel plate primarily used for structural applications. It has excellent weldability, machinability, and durability, making it ideal for general fabrication, construction, and automotive industries.
Features of Mild Steel Plate:
Low Carbon Content: Generally contains up to 0.25% carbon.
High Ductility: Can be easily bent and shaped.
Good Weldability: Suitable for welding and fabrication.
Affordable Cost: Lower price compared to specialized steel plates.
What is Boiler Plate Steel?
Boiler Plate Steel, also known as Pressure Vessel Steel, is designed to withstand high pressure and extreme temperatures. It is commonly used in manufacturing boilers, pressure vessels, and heat exchangers.
Features of Boiler Plate Steel:
High Tensile Strength: Can handle extreme pressure and heat.
Corrosion Resistance: Resistant to oxidation and rust.
Good Weldability: Suitable for high-pressure applications.
Higher Cost: Due to its enhanced properties.
Equivalent SA Boiler Steel 516 Grade 70 Plate
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Chemical Properties of Mild Steel Plate vs. Boiler Plate
| Element | Mild Steel Plate (%) | Boiler Plate (%) |
|---|---|---|
| Carbon (C) | 0.10 – 0.25 | 0.25 – 0.30 |
| Manganese (Mn) | 0.40 – 0.70 | 0.85 – 1.20 |
| Phosphorus (P) | 0.040 max | 0.035 max |
| Sulfur (S) | 0.050 max | 0.035 max |
| Silicon (Si) | 0.05 – 0.30 | 0.15 – 0.40 |
| Chromium (Cr) | – | 0.30 max |
| Molybdenum (Mo) | – | 0.08 max |
Mechanical Properties of Mild Steel Plate vs. Boiler Plate
| Property | Mild Steel Plate | Boiler Plate |
| Tensile Strength | 400 – 550 MPa | 485 – 620 MPa |
| Yield Strength | 250 MPa min | 260 MPa min |
| Elongation | 20% min | 17% min |
| Hardness (Brinell) | 120 – 180 HB | 140 – 200 HB |
Boiler Plate Cost vs. Mild Steel Plate Cost
The cost of steel plates depends on various factors such as grade, thickness, availability, and market demand.
Boiler Plate Cost
Boiler plate steel is more expensive than mild steel due to its higher strength and resistance to extreme conditions.
Prices typically range from 55 rupee to 59 rupee per killogram, depending on the grade and thickness.
Mild Steel Plate Cost
Mild steel is more affordable and widely available.
Prices range from 59 rupee to 61 rupee per killogram depending on the specifications.
Specifications of Boiler Plate and Mild Steel Plate
| Specification | Mild Steel Plate | Boiler Plate |
| Standard | IS 2062, ASTM A36 | ASTM A516, ASME SA516 |
| Thickness | 3mm – 150mm | 6mm – 150mm |
| Width | 1000mm – 3500mm | 1500mm – 3500mm |
| Length | 2500mm – 12000mm | 3000mm – 12000mm |
| Heat Treatment | As Rolled | Normalized, Quenched & Tempered |
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