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
- Type: Round bar
- Steel Grade: ZF7B / 20MnCrB5 / 1.7168
- Available Diameters: 8 mm to 160 mm
- Standards: EN 10263, DIN EN 10083
- Tolerances: h9, h11
Chemical Composition
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.
Mechanical Properties
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 |
Applications
The ZF7B steel round bar is widely used in:
- Automotive fastener production
- High-strength bolts
- Manufacturing of hardware and fixings
- Transmission components
- Critical fasteners
- Load-bearing parts
Features of Steel 1.7168
- High Hardenability: Boron ensures excellent suitability for quenching.
- Ductility: Outstanding formability in the annealed state simplifies cold heading.
- Machinability: Easy to machine before heat treatment.
- Versatility: Suitable for cold heading and other cold deformation techniques.
Heat Treatment
Recommended heat treatment parameters:
| Process | Temperature (°C) |
|---|---|
| Annealing | 680–720 |
| Normalizing | 880–920 |
| Quenching | 860–900 |
| Tempering | 180–220 |
Benefits of Purchase
- Guaranteed high-quality steel products
- Compliance with international standards
- Accurate geometric dimensions
- Certified products
- Fast delivery
- Technical consultation from experts
Terms of Purchase
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!
Forms made of steel ZF7B / 20MnCrB5 / 1.7168
Steel round bar | |
| Steel grade | Diameters (mm) |
| ZF7B / 20MnCrB5 / 1.7168 | 20 – 420 |
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