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Steel Round Bar ZF7B / 20MnCrB5 / 1.7168: High-Quality Boron-Containing Steel General Specifications The ZF7B (20MnCrB5 / 1.7168) steel round bar is a high-quality boron-alloyed structural steel widely used in the automotive industry and for manufacturing fasteners. This steel grade is known for its enhanced strength and improved hardenability due to boron addition. Product Characteristics […]
Steel Round Bar ZF7B / 20MnCrB5 / 1.7168: High-Quality Boron-Containing Steel
The ZF7B (20MnCrB5 / 1.7168) steel round bar is a high-quality boron-alloyed structural steel widely used in the automotive industry and for manufacturing fasteners. This steel grade is known for its enhanced strength and improved hardenability due to boron addition.
The unique properties of 20MnCrB5 are achieved through a carefully designed chemical composition:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.18–0.23 |
| Silicon (Si) | ≤ 0.30 |
| Manganese (Mn) | 1.10–1.40 |
| Chromium (Cr) | 1.30–1.60 |
| Boron (B) | 0.0008–0.0050 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
The boron content significantly enhances the steel’s hardenability while maintaining high ductility in the annealed state.
The 20MnCrB5 steel round bar exhibits the following mechanical characteristics:
| Property | Value |
|---|---|
| Yield Strength | ≥ 340 MPa |
| Tensile Strength | 600–750 MPa |
| Elongation (A5) | ≥ 14% |
| Reduction of Area (Z) | ≥ 35% |
| Hardness (Annealed) | ≤ 230 HB |
| Hardness (After Quenching) | 48–54 HRC |
The ZF7B steel round bar is widely used in:
Recommended heat treatment parameters:
| Process | Temperature (°C) |
|---|---|
| Annealing | 680–720 |
| Normalizing | 880–920 |
| Quenching | 860–900 |
| Tempering | 180–220 |
The ZF7B / 20MnCrB5 / 1.7168 steel round bar is available for both wholesale and retail purchase. For detailed pricing and delivery terms, please contact our managers.
Superior quality and reliability—20MnCrB5 steel round bar for your production needs!
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Steel round bar |
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| Steel grade | Diameters (mm) |
| ZF7B / 20MnCrB5 / 1.7168 | 20 – 420 |
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