What is the raw material of S235JR steel plate?

The raw material of S235JR steel plate is non-alloy carbon steel. It is primarily composed of iron (Fe) as the base metal, with controlled amounts of carbon (C), manganese (Mn), phosphorus (P), and sulfur (S) to achieve the desired mechanical properties and structural performance.  

Key Elements in S235JR steel plate Raw Material:

1. Iron (Fe):  
- The primary component and base material of S235JR.  

2. Carbon (C):  
- Present in small amounts (maximum 0.17%), carbon provides the required strength and hardness while maintaining weldability and ductility.  

3. Manganese (Mn):  
- Added (up to 1.4%) to improve toughness, strength, and wear resistance.  

4. Phosphorus (P) and Sulfur (S):  
- These are impurities kept at low levels (P ≤ 0.045% and S ≤ 0.045%) to maintain ductility and prevent brittleness.  

5. Silicon (Si):  
- Present in trace amounts to enhance strength and improve deoxidation during steelmaking.  

Production Process:
The raw material for S235JR steel plate is derived from iron ore, scrap metal, or a combination of both, and processed in basic oxygen furnaces (BOF) or electric arc furnaces (EAF). The molten steel is refined to achieve the correct chemical composition and cast into billets, blooms, or slabs for further processing into plates, sheets, or structural profiles.

Applications of S235JR steel plate: S235JR steel plate is widely used in structural applications like bridges, buildings, and construction frameworks due to its balanced combination of strength, weldability, and affordability.