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Stainless (SUS304) Spec Table
Stainless (SUS304) KS Specifications — 14 sizes
KS D 3698
Minimum bend values for SUS304 stainless steel. Requires larger R due to stronger work hardening than general steel.
Practical Notes
- Stronger work hardening than mild steel requires larger R. Minimum R = 0.5–1.0t is standard.
- Greater springback than mild steel requires overbending. Bend 2–5° beyond target angle.
KSStainless (SUS304)
14 sizes| Thickness t | Material | Min R | Min L | Type | Note |
|---|---|---|---|---|---|
| 0.3 | SUS304 | 0.45 | 1.35 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 0.4 | SUS304 | 0.6 | 1.8 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 0.5 | SUS304 | 0.75 | 2.25 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 0.6 | SUS304 | 0.9 | 2.7 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 0.8 | SUS304 | 1.2 | 3.6 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 1.0 | SUS304 | 1.5 | 4.5 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 1.2 | SUS304 | 1.8 | 5.4 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 1.5 | SUS304 | 2.25 | 6.75 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 2.0 | SUS304 | 3.0 | 9.0 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 2.5 | SUS304 | 3.75 | 11.25 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 3.0 | SUS304 | 4.5 | 13.5 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 4.0 | SUS304 | 6.0 | 18.0 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 5.0 | SUS304 | 7.5 | 22.5 | Stainless (SUS304) | MachiningHardening Risk, Spring |
| 6.0 | SUS304 | 9.0 | 27.0 | Stainless (SUS304) | MachiningHardening Risk, Spring |
Key Features
- SUS304 austenitic; high work-hardening rate requires minimum R 1.5–2× larger than SPCC
- Significant springback requires overbending (1–3°) beyond target angle
- t0.5–3.0 mm; transverse R ≥ 1.5t / longitudinal R ≥ 2.0t recommended
Key Applications
Food machine exteriors, kitchen equipment panels, medical device cases, cleanroom sheet metal, architectural stainless panels
FAQ
How much springback does SUS304 have?
About 2–3× more springback than SPCC. Approximately 3–5° overbending is needed for 90° bends.