321 Stainless steel coil is an austenitic cr-ni stainless steel containing titanium. We recommend it for soldered manufactured parts, but not for subsequent annealing.
Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 – 1500 °F (427 – 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.
| Chemical composition(%) of stainless steel 321 | ||||||||
| element | C | Si | Mn | S | P | Cr | Ni | Mo |
| content | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 17.00-19.00 | 9.00-12.00 | 10.00-14.00 |
| Mechanical properties of stainless steel 321 | ||||
| performance | Yield strength | Conditional yield strength | Hardness | Elongation |
| Proportion | ≥520 Mpa | ≥205 Mpa | ≤ 187hb; ≤ 90hrb; ≤ 200hv | ≥40% |
PVC film is one of the most important factor when purchasing stainless steel material. Basically, 3 types of PVC films are typically applied.
PE50/PE80 black and white film
This is the most widely used film, the thickness normally ranges from 50 micron to 80 microns. There will not be any special function except protection.,
Laser Film(Novacel 4228)
Laser cutting is often applied as a downstream processing. Laser film is a film that can undertake high temperature. If clients apply the wrong pvc, after laser cutting, the pvc will be wrinkled and sticky to the surface.
Transparent Film
There are normally 2 types of blue transparent film, one is the for deep drawing, another one is normal protection film.
Coil Weight Control
Based on client requirement, we can control the stainless steel coil weight to 1-24 tons.
Coil Package
Every coil has to be packed with stronger steel strip and make sure the wooden pallet is strong enough
Loading and locating
Strengthen steel ropes will be applied to make sure the coils will not move during the loading.
Wooden blocks
To get rid of pallet shift during the transportation, wooden blocks will be applied
Eye to door loading
This loading method is easier for clients to get coils unload.
Complicated loading
This loading method is mainly used for special shipping lines or clients who has a high requirement for shipment.
