Specifying Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) in Grade 12.9 Steel pairs the dimensional form of Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) (ISO / DIN) with the engineering properties of Grade 12.9 Steel. This page explains when to choose the grade, how it behaves in service, and which grades to compare it against.
Why Choose Grade 12.9 Steel for Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157)
The highest common strength class, for high-load machine assembly. For wire rope clip (u-bolt) — iso / din (series 157), this matters when requires plating or black-oxide protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | class 12.9 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | up to approx. +300 °C |
| Corrosion characteristic | Requires plating or black-oxide protection |
Corrosion Behavior in Service
Carbon and alloy steel wire rope clip (u-bolt) — iso / din (series 157) 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.
Galvanic & Galling Considerations
For wire rope clip (u-bolt) — iso / din (series 157) in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Sizes of Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) Available in Grade 12.9 Steel
| For rope diameter (mm) | U-bolt diameter (mm) | Saddle width (mm) | Bolt thread | Working load limit (kg) | Reference standard |
|---|---|---|---|---|---|
| 6 | M5 | 16 | M5 | 60 | DIN 1142 / GB/T 5976 |
| 8 | M6 | 20 | M6 | 110 | DIN 1142 / GB/T 5976 |
| 10 | M8 | 26 | M8 | 180 | DIN 1142 / GB/T 5976 |
| 12 | M10 | 32 | M10 | 260 | DIN 1142 / GB/T 5976 |
| 16 | M12 | 38 | M12 | 460 | DIN 1142 / GB/T 5976 |
| 20 | M14 | 45 | M14 | 720 | DIN 1142 / GB/T 5976 |
| 24 | M16 | 55 | M16 | 1050 | DIN 1142 / GB/T 5976 |
| 30 | M20 | 70 | M20 | 1640 | DIN 1142 / GB/T 5976 |