For spring (roll) pin in A4 Stainless Steel, the controlling selection factors are corrosion exposure, strength requirement and service temperature. The grade data for A4 Stainless Steel (A4-80 (316)) is summarized below together with every size supplied.
Why Choose A4 Stainless Steel for Spring (Roll) Pin — ISO / DIN (Series 104)
Specified for marine, coastal and chemical applications. For spring (roll) pin — iso / din (series 104), this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A4-80 (316) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| Corrosion characteristic | Superior, including marine and chloride environments |
Corrosion Behavior in Service
A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Spring (Roll) Pin — ISO / DIN (Series 104) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Galvanic & Galling Considerations
Two important notes for stainless spring (roll) pin — iso / din (series 104): (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Sizes of Spring (Roll) Pin — ISO / DIN (Series 104) Available in A4 Stainless 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 |