When Spring (Roll) Pin — ISO / DIN (Series 104) are required in Grade 8.8 Steel, the alternative grades and the trade-offs between them matter as much as the dimensions. This page covers both, plus mechanical and corrosion data.
Why Choose Grade 8.8 Steel for Spring (Roll) Pin — ISO / DIN (Series 104)
The workhorse medium-carbon alloy grade for structural joints. For spring (roll) pin — iso / din (series 104), 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 spring (roll) pin — iso / din (series 104) 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 spring (roll) pin — iso / din (series 104) 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 Spring (Roll) Pin — ISO / DIN (Series 104) Available in Grade 8.8 Steel
| Nominal diameter (mm) | Length L (mm) | Recommended hole (mm) | Material | Reference standard |
|---|---|---|---|---|
| 2 | 12 | 2.0 | Spring steel | ISO 8748 / DIN 1481 |
| 3 | 16 | 3.0 | Spring steel | ISO 8748 / DIN 1481 |
| 4 | 20 | 4.0 | Spring steel | ISO 8748 / DIN 1481 |
| 5 | 25 | 5.0 | Spring steel | ISO 8748 / DIN 1481 |
| 6 | 32 | 6.0 | Spring steel | ISO 8748 / DIN 1481 |
| 8 | 40 | 8.0 | Spring steel | ISO 8748 / DIN 1481 |
| 10 | 50 | 10.0 | Spring steel | ISO 8748 / DIN 1481 |
| 12 | 63 | 12.0 | Spring steel | ISO 8748 / DIN 1481 |
| 16 | 80 | 16.0 | Spring steel | ISO 8748 / DIN 1481 |