LAWAI is the centrifugal casting manufacturer in Taiwan specialized in producing stainless steel & special alloy tubes, sleeves and rings. Custom large rings are one of the centrifugal casting products we produce in high frequency.
LAWAI’s large rings are not only for high-performance valves, butterfly valves and semiconductor industries but also for high-temperature applications.
Most LAWAI’s customers purchase our blank large rings ( pre-machined surfaces) and do the finish machining by themselves.
If customers need finish machined large rings, we will machine them by ourselves or cooperate with outsourcing machine shop based on the complexity of the large rings.
- The common materials of large rings including stainless steel 300 series, 400 series, duplex stainless steel, 17-4PH, Ni-resist, heat-resist alloys and Nickel-based alloys. Please send us the chemical composition if the materials above do not fit your applications.
- The diameter we produce for large rings is smaller than 400 mm. (Max. OD is around 400 mm)
- The main applications of our large rings are marine, valve, oil & gas, petrochemical, semiconductor industries …etc.
Please let us know your demands of large rings via the left inquiry form or email, LAWAI team are ready to produce valuable large rings for you.
The custom large rings made at LAWAI, made in Taiwan are good enough for all your applications!
LAWAI INDUSTRIAL CORPORATION
No.1283-1, Ren-ai Road, Chunan Township,
Miaoli County, Taiwan
- E-mail: [email protected]
- Follow LAWAI on FACEBOOK & INSTAGRAM & YouTube

| LAWAI ALLOY | Cast Specifications | Wrought Specifications | ||
|---|---|---|---|---|
| ASTM | UNS | AISI | UNS | |
| CF8 ( EN 1.4308 ) | A351/743/744 CF8 | J92600 | 304 | S30400 |
| CF3 ( EN 1.4309 ) | A351/743/744 CF3 | J92500/J92700 | 304L | S30403 |
| CF8M ( EN 1.4408 ) | A351/743/744 CF8M | J92900 | 316 | S31600 |
| CF3M ( EN 1.4409 ) | A351/743/744 CF3M | J92800 | 316L | S31603 |
| CK20 | A351/743/744 CK20 | J94202 | 310 | S31000 |
| CG8M | A351/743/744 CG8M | J93000 | 317 | S31700 |
| CG3M | A351/743/744 CG3M | J92999 | 317L | S31703 |
| CF10SMnN ( Nitronic 60 ) | A351/743/744 | J92972 | ||
| CG6MMN ( Nitronic 50 ) | A351/743/744 | J93790 | ||
| CF3M-HM (Min. 2.75% Mo) | ||||
| CH20 | A351/743 | J93402 | 309 | S30900 |
| CE20N | A351/451 | J92802 | ||
| Nitronic 33 | ||||
| Nitronic 40 | ||||
| CN7MS | A744 | J94650 | ||
| CN3MN | A743/A744 | J94651 | ||
| CK3MCuN | J93254 | 254SMO | ||
| RA330 | ||||
| LAWAI ALLOY | Cast Specifications | Wrought Specifications | ||
|---|---|---|---|---|
| ASTM | UNS | AISI | UNS | |
| CA15 ( EN 1.4011 ) | A743 CA15 | J91150 | 410 | |
| CA40 ( EN 1.4027 ) | A743 CA40 | J91153 | 420 | |
| CA6NM ( EN 1.4317 ) | A743 CA6NM | J91540 | 13-4, F6NM | |
| CA40F | A744 CAA40F | J91154 | 420F | |
| 416 | A582 416 | 416 | S41600 | |
| LAWAI ALLOY | Cast Specifications | Wrought Specifications | ||
|---|---|---|---|---|
| ASTM | UNS | AISI | UNS | |
| CB7Cu-1 | A747 Gr CB7Cu-1 | J92180 | 17-4PH | S17400 |
| CB7Cu-2 | A747 Gr CB7Cu-2 | J92110 | 15-5PH | S15500 |
| LAWAI ALLOY | Cast Specifications | Wrought Specifications | ||
|---|---|---|---|---|
| ASTM | UNS | AISI | UNS | |
| Ni-resist 1 | A436 Type 1 | F41000 | ||
| Ni-resist 2 | A436 Type 2 | F41002 | ||
| D-2M (DIN GGG-NiMn 23 4) | ||||
| LAWAI ALLOY | Cast Specifications | Wrought Specifications | ||
|---|---|---|---|---|
| ASTM | UNS | AISI | UNS | |
| HF / SCH12 ( EN 1.4825 ) | A297 HF | |||
| HH-2 / SCH13 A ( EN 1.4837 ) | A297 HH | |||
| HK / SCH21 ( EN 1.4848 ) | A297 HK | |||
| HK 40 / SCH22 | A351 HK 40 | |||
| HP / SCH24 ( EN 1.4857 ) | A297 HP | |||
| HU / SCH20 ( EN 1.4865 ) | A297 HU | |||
| HP MOD ( EN 1.4852 ) | ||||
| 800H ( EN 1.4859 ) | A351 CT15C | N08151 | INCOLOY 800H | N08810 |
| 718 | N07718 | INCONEL 718 | N07718 | |

