A4 Stainless Steel Grooved Pins (DIN 1471–1474) are supplied to DIN 1473. The grade provides superior, including marine and chloride environments and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint. Property data, grade comparison and the full size table follow.
Why Choose A4 Stainless Steel for Grooved Pins (DIN 1471–1474)
Specified for marine, coastal and chemical applications. For grooved pins (din 1471–1474), this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| 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 Grooved Pins (DIN 1471–1474) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Galvanic & Galling Considerations
For stainless grooved pins (din 1471–1474) the compatibility question is galvanic rather than galling: joined to aluminum or galvanized steel in wet service, stainless drives corrosion of the less-noble metal. Isolate with a coating, sleeve or non-conductive washer where the joint sees moisture. Note also that stainless is softer than hardened carbon steel, so where the part carries a wear or shear duty, check the load against the grade before substituting.
Using Stainless Fasteners in Aluminum
Expect the aluminum to corrode, not the fastener — stainless sits higher in the galvanic series, so the aluminum is the one that gives up material. A small fastener in a thick section spreads the loss over a large area and is usually fine; a large fastener in thin sheet concentrates it and is not. Keep water out of the joint, or isolate the two metals with a nylon or coated washer and a sealant.
Sizes of Grooved Pins (DIN 1471–1474) Available in A4 Stainless Steel
| Nominal diameter d (mm) | Hole diameter H11 (mm) | Length L (mm) | Groove form | Double shear (kN) | Hole preparation | Material | Reference standard |
|---|---|---|---|---|---|---|---|
| 2 | 2.0 | 10 | Full-length parallel | 2.6 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 3 | 3.0 | 16 | Full-length parallel | 5.9 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 4 | 4.0 | 20 | Full-length parallel | 10.5 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 5 | 5.0 | 26 | Full-length parallel | 16.4 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 6 | 6.0 | 32 | Full-length parallel | 23.6 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 8 | 8.0 | 40 | Full-length parallel | 42.0 | Drilled H11 | Steel, case hardened | DIN 1473 |
| 10 | 10.0 | 50 | Full-length parallel | 65.6 | Drilled H11 | Steel, case hardened | DIN 1473 |
