D688 High-Chromium Hardfacing
Boron-alloyed high-chromium deposit for severe abrasion.
Material overview
The Hardfacing & Wear Welding Consumables catalog describes D688 High-Chromium Hardfacing as follows: Boron-alloyed high-chromium deposit for severe abrasion. Reviewers should evaluate HRC 58-62, extreme abrasion, and brittle, low impact tolerance. The grade record lists Mill liners, dredger parts, chutes, and severe non-impact wear among typical applications. The dataset currently includes 7 property records covering chemical composition and mechanical properties. Standards and form records reference A5.13 and A5.21 and Flux-Cored Wire. Final supply conditions remain subject to specification, inspection, and export-control review.
Key characteristics
- HRC 58-62
- extreme abrasion
- brittle, low impact tolerance
Typical applications
- Mill liners
- dredger parts
- chutes
- severe non-impact wear
Grade names and equivalents
Technical properties
Typical values are for reference only. Final chemistry, mechanical properties, heat treatment, dimensions, inspection, and documentation are confirmed against the applicable specification and MTC/COA before order acceptance.
Chemical composition
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| C | 4.0-5.0 | wt% | Typical value |
| Cr | 23.0-27.0 | wt% | Typical value |
| B | 0.3-0.7 | wt% | Typical value |
| Mn | 1.0 max | wt% | Typical value |
| Si | 0.5-1.0 | wt% | Typical value |
| Fe | balance | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Hardness | 58-62 HRC | HRC | As welded |
Standards and specifications
Forms, applications, and capabilities
Product forms
- Product form
Industries
- Industry
- Industry
Capabilities
- Capability
- Capability
- Nondestructive & Laboratory Testing