What does TA mean in SUS301 CSP TA?

🧩 What does TA mean in “SUS301 CSP TA”?

TA denotes Tempered Annealed, or tension-annealed finish: a low-temperature stress-relief anneal applied after cold rolling to minimize internal stress, enhance flatness, and stabilize the final dimensions

🔬 Why use TA on SUS301 CSP material?

Significantly reduces residual stress from cold forming, yielding excellent flatness and uniform surface quality

Adds a controlled temper or color, improving dimensional stability in thin strips and foils

Ideal for precision parts like gaskets, connectors, springs, HDD components, and medical/ETC parts where spring properties and tight tolerances are critical

🛠 Process overview for SUS301 CSP TA

Process overview for SUS301 CSP TA
High‑temperature solution anneal to dissolve carbides and form austenite

Cold rolling to desired hardness/tempers (¼H, ½H, H, EH,SEH, etc.)

TA (low‑temperature temper anneal): stress-relief, tension annealing, final thickness control, and flatness finishing – often producing a flat, slightly colored surface

✅ Summary statement

“SUS301 CSP TA” refers to type 301 cold‑rolled spring‑steel strip that has undergone a tempered anneal (TA) finish: a stress-relief heat treatment after cold rolling that ensures excellent flatness, internal stress reduction, and tight dimensional stability—perfect for high-precision spring and foil applications.