For Flanged Sleeve Bushing — ISO / DIN (Series 135) in Grade 8.8 Steel, the controlling decisions are corrosion, strength and service temperature. This guide summarizes those three for Grade 8.8 Steel Flanged Sleeve Bushing — ISO / DIN (Series 135) and lists every size we supply.
Why Choose Grade 8.8 Steel for Flanged Sleeve Bushing — ISO / DIN (Series 135)
The workhorse medium-carbon alloy grade for structural joints. For flanged sleeve bushing — iso / din (series 135), 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 flanged sleeve bushing — iso / din (series 135) 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.
Comparable Grades
For Flanged Sleeve Bushing — ISO / DIN (Series 135), class 10.9 or 12.9 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of Flanged Sleeve Bushing — ISO / DIN (Series 135) Available in Grade 8.8 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 |