For flanged sleeve bushing 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 Flanged Sleeve Bushing — ISO / DIN (Series 135)
Specified for marine, coastal and chemical applications. For flanged sleeve bushing — iso / din (series 135), 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 Flanged Sleeve Bushing — ISO / DIN (Series 135) in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Galvanic & Galling Considerations
Two important notes for stainless flanged sleeve bushing — iso / din (series 135): (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 Flanged Sleeve Bushing — ISO / DIN (Series 135) Available in A4 Stainless Steel
| Inner diameter d (mm) | Outer diameter D (mm) | Length L (mm) | Flange diameter F (mm) | Material | Reference standard |
|---|---|---|---|---|---|
| 6 | 8 | 10 | 12 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 8 | 10 | 12 | 14 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 10 | 12 | 15 | 16 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 12 | 14 | 18 | 18 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 16 | 18 | 20 | 22 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 20 | 23 | 25 | 28 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 25 | 28 | 30 | 34 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 30 | 34 | 35 | 40 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 40 | 45 | 45 | 52 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |
| 50 | 55 | 50 | 62 | Oil-impregnated bronze | ISO 4379 / GB/T 18324 |