Minimum Bend Radius Spec Table
9 types of spec data
General Steel (SPCC)
General Steel (SPCC) · 13 sizes
Hot-Rolled Thin Sheet (SPHC)
Hot-Rolled Thin Sheet (SPHC) · 10 sizes
Hot-Rolled Steel (SS400)
Hot-Rolled Steel (SS400) · 15 sizes
Stainless (SUS304)
Stainless (SUS304) · 14 sizes
Stainless (SUS316)
Stainless (SUS316) · 11 sizes
Aluminum (A5052)
Aluminum (A5052) · 14 sizes
Aluminum (A6061-T6)
Aluminum (A6061-T6) · 10 sizes
Brass (C2801)
Brass (C2801) · 8 sizes
Copper (C1100)
Copper (C1100) · 8 sizes
Frequently Asked Questions
What is the minimum bend radius (R)?
The minimum inside bend radius that prevents cracking when bending sheet metal. Varies by material, thickness, and grain direction. Typical values: mild steel (SPCC) 0–0.5t, SUS304 0.5–1.0t, aluminum A5052 1.0–1.5t.
What is the relationship between bend direction and rolling direction?
Bending perpendicular to the rolling direction (grain) reduces crack risk. Bending parallel to the grain requires a larger minimum R. It is best practice to annotate both bend lines and rolling direction on drawings.