Grade 12.9 Steel Solid Rivets pairs the standard ISO 1051 / DIN 660 / DIN 661 with a Grade 12.9 Steel base material. The sections below cover why engineers select this grade for solid rivets, its corrosion and temperature behavior, and the sizes available.
Why Choose Grade 12.9 Steel for Solid Rivets
The highest common strength class, for high-load machine assembly. For solid rivets, 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 solid rivets 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 solid rivets 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 Solid Rivets Available in Grade 12.9 Steel
| Nominal diameter (mm) | Common length range (mm) | Head diameter dk (mm) | Head height k (mm) | Countersunk head dia (mm) | Reference standard |
|---|---|---|---|---|---|
| 1.0 | 2~10 | 2.0 | 0.7 | 1.9 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 1.2 | 2~12 | 2.4 | 0.8 | 2.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 1.6 | 3~16 | 3.2 | 1.0 | 3.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 2.0 | 3~20 | 4.0 | 1.3 | 3.8 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 2.5 | 4~25 | 5.0 | 1.6 | 4.7 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 3.0 | 4~30 | 6.0 | 1.9 | 5.6 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 4.0 | 5~40 | 8.0 | 2.5 | 7.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 5.0 | 6~50 | 10.0 | 3.1 | 9.4 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 6.0 | 8~60 | 12.0 | 3.8 | 11.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 8.0 | 10~80 | 16.0 | 5.0 | 15.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 10.0 | 14~100 | 20.0 | 6.3 | 18.7 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 12.0 | 16~120 | 24.0 | 7.5 | 22.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 14.0 | 18~140 | 28.0 | 8.8 | 26.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 16.0 | 20~160 | 32.0 | 10.0 | 30.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 18.0 | 22~180 | 36.0 | 11.0 | 34.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 20.0 | 25~200 | 40.0 | 12.5 | 37.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 22.0 | 28~200 | 44.0 | 13.8 | 41.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 25.0 | 32~200 | 50.0 | 15.6 | 47.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |