Steel Circle 1.5531 / 30MnB5
Overview
Steel circle 1.5531 / 30MnB5 is a boron-alloyed low-alloy steel known for its high strength, wear resistance, and excellent mechanical properties after heat treatment. It is widely used in agricultural machinery, mechanical engineering, and other industries requiring enhanced durability.
Chemical Composition (%):
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.27 – 0.33 |
| Silicon (Si) | 0.20 – 0.40 |
| Manganese (Mn) | 1.10 – 1.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 0.15 – 0.30 |
| Boron (B) | 0.0005 – 0.005 |
Mechanical Properties:
| Parameter | Value |
|---|---|
| Hardness (HB) | 170–230 |
| Yield Strength (MPa) | ≥ 500 |
| Tensile Strength (MPa) | 900–1100 |
| Elongation (%) | ≥ 10 |
| Impact Toughness (J) | ≥ 35 |
Applications
- Agricultural Machinery – manufacturing of plows, moldboards, and cultivator tines
- Mechanical Engineering – components subjected to high mechanical loads
- Automotive Industry – production of reinforced suspension elements
- Construction – fastening elements and reinforced structures
Advantages
✅ High wear resistance and strength after heat treatment
✅ Excellent mechanical properties under impact loads
✅ Optimal hardenability and processing stability
✅ Increased durability in demanding operating conditions
Steel 1.5531 / 30MnB5 is a reliable material for components operating under high loads and intensive wear conditions.
Steel circle delivery forms 1.5531 / 30MnB5
Steel circles | |
| Steel grades | Dimensions supplied (mm) |
| Steel circle 1.5531 / 30MnB5 | 10 – 400 |