Material specification page for e-clips (external snap rings) in Grade 8.8 Steel. Covers the grade designation (class 8.8), corrosion and magnetic behavior, comparable grades and their trade-offs, and the sizes available to DIN 6799.
Why Choose Grade 8.8 Steel for E-Clips (External Snap Rings)
The workhorse medium-carbon alloy grade for structural joints. For e-clips (external snap rings), this matters when requires plating (zinc) for corrosion protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | class 8.8 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | up to approx. +300 °C |
| Corrosion characteristic | Requires plating (zinc) for corrosion protection |
Corrosion Behavior in Service
Carbon and alloy steel e-clips (external snap rings) require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Comparable Grades
For E-Clips (External Snap Rings), class 10.9 or 12.9 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of E-Clips (External Snap Rings) Available in Grade 8.8 Steel
| Groove diameter (mm) | Shaft diameter range (mm) | Outside diameter (mm) | Thickness s (mm) | Reference standard | Notes |
|---|---|---|---|---|---|
| 1.2 | 1.4~2.0 | 3.0 | 0.3 | DIN 6799 | E-clip, radial-fit external retaining |
| 1.5 | 2.0~2.5 | 3.8 | 0.4 | DIN 6799 | E-clip, radial-fit external retaining |
| 1.9 | 2.5~3.2 | 4.8 | 0.4 | DIN 6799 | E-clip, radial-fit external retaining |
| 2.3 | 3.2~4.0 | 6.0 | 0.6 | DIN 6799 | E-clip, radial-fit external retaining |
| 3.2 | 4.0~5.0 | 7.4 | 0.6 | DIN 6799 | E-clip, radial-fit external retaining |
| 4.0 | 5.0~7.0 | 9.0 | 0.7 | DIN 6799 | E-clip, radial-fit external retaining |
| 5.0 | 7.0~9.0 | 11.0 | 0.7 | DIN 6799 | E-clip, radial-fit external retaining |
| 6.0 | 9.0~11.0 | 12.2 | 0.8 | DIN 6799 | E-clip, radial-fit external retaining |
| 7.0 | 11.0~14.0 | 14.3 | 0.9 | DIN 6799 | E-clip, radial-fit external retaining |
| 8.0 | 14.0~18.0 | 16.2 | 1.0 | DIN 6799 | E-clip, radial-fit external retaining |
| 9.0 | 18.0~24.0 | 18.0 | 1.0 | DIN 6799 | E-clip, radial-fit external retaining |
| 10.0 | 24.0~31.0 | 20.2 | 1.2 | DIN 6799 | E-clip, radial-fit external retaining |
| 12.0 | 31.0~38.0 | 23.2 | 1.2 | DIN 6799 | E-clip, radial-fit external retaining |
| 15.0 | 38.0~45.0 | 29.0 | 1.5 | DIN 6799 | E-clip, radial-fit external retaining |
| 19.0 | 45.0~55.0 | 37.0 | 1.75 | DIN 6799 | E-clip, radial-fit external retaining |
| 24.0 | 55.0~70.0 | 44.0 | 2.0 | DIN 6799 | E-clip, radial-fit external retaining |