Case-hardening steel
20MnCrB5 / 1.7168 case-hardening steel
20MnCrB5 is a boron-alloyed case-hardening steel with Werkstoffnummer 1.7168. Boron gives hardenability in the case with the same process as 20MnCr5. Drawings may specify ZF7B for the same number. That is not a manufacturer approval in itself – the certificate says 20MnCrB5 / 1.7168 unless you have specified otherwise. INDUSTRISTÅL supplies bar, cuts to length and ships with 3.1.
Typical applications
- Gears with boron on the drawing
- Series case-hardening
- Carburised shafts
Delivery conditions
- +A / +FP depending on mill
Designations
- W.Nr.
- 1.7168
- EN standard
- 20MnCrB5
- Group
- Alloy engineering steel
Heat treatment
Carburising and hardening to your procedure.
Sawing and machining
Cutting to length. State whether ZF7B is a drawing name or a separate requirement.
Certificates and documentation
EN 10204/3.1. The designation on the certificate must match the PO.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Ø20–160 mm | Boron-alloyed case-hardening steel. ZF7B is a trade alias — W.Nr. 1.7168 on the certificate. |
The range is a delivery programme, not a stock statement. Length is cut to your drawing.
Frequently asked questions
- What is 20MnCrB5?
- 20MnCrB5 / 1.7168 is a boron-alloyed case-hardening steel. Same process as 20MnCr5, with boron in the analysis.
- Is ZF7B the same as 20MnCrB5?
- Drawings often use ZF7B for W.Nr. 1.7168. We supply to the name and the certificate you can approve – not as a promise of a particular mill list.
- Do you supply 20MnCrB5 round bar?
- Yes. State Ø, length and the designation the certificate must carry.
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Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.