For Turnbuckle — ISO / DIN (Series 156) in Grade 12.9 Steel, the controlling decisions are corrosion, strength and service temperature. This guide summarizes those three for Grade 12.9 Steel Turnbuckle — ISO / DIN (Series 156) and lists every size we supply.
Why Choose Grade 12.9 Steel for Turnbuckle — ISO / DIN (Series 156)
The highest common strength class, for high-load machine assembly. For turnbuckle — iso / din (series 156), 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 turnbuckle — iso / din (series 156) 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 turnbuckle — iso / din (series 156) 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 Turnbuckle — ISO / DIN (Series 156) Available in Grade 12.9 Steel
| Thread size | Total length closed (mm) | Take-up length (mm) | Working load limit (kg) | Material | Reference standard |
|---|---|---|---|---|---|
| M6 | 105 | 75 | 80 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M8 | 125 | 90 | 140 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M10 | 150 | 110 | 230 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M12 | 180 | 135 | 340 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M16 | 230 | 170 | 700 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M20 | 290 | 215 | 1200 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M24 | 355 | 260 | 1800 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
| M30 | 420 | 320 | 3200 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |