TOBO STEEL GROUP CHINA
| Heat Treatment | Solution Annealed at 1050 C, Water Quenched |
| Supply Ability | 800 Tons per Month |
| Application | Elevated Temperature Steam and Exhaust Line |
| Thickness | SCH40S |
| Test | Intergranular Corrosion Test ASTM A262 Practice E |
| Payment Terms | T/T,L/C at sight,D/P at sight |
| Material Grade | ASTM A403 WP321H, UNS S32109 |
| Packaging Details | Plywood case with waterproof paper, steel strip and sea worthy export packing |
| End Connection | Beveled End |
| Wall Thickness | 12.70 mm SCH40S |
| Delivery Time | 7-10 days for stock sizes, 20-25 days for production |
| Standard | ASME B16.9 |
| product name | Solution Annealed WP321H Stainless Reducer |
| Size | 20 Inch x 16 Inch |
| Model Number | SSR-RD-321H-20IN |
| Place of Origin | Cangzhou, Hebei, China |
| Certification | ISO 9001:2015, PED 2014/68/EU, EN 10204 3.1 |
| Brand Name | HENGYU |
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Product Specification
| Heat Treatment | Solution Annealed at 1050 C, Water Quenched | Supply Ability | 800 Tons per Month |
| Application | Elevated Temperature Steam and Exhaust Line | Thickness | SCH40S |
| Test | Intergranular Corrosion Test ASTM A262 Practice E | Payment Terms | T/T,L/C at sight,D/P at sight |
| Material Grade | ASTM A403 WP321H, UNS S32109 | Packaging Details | Plywood case with waterproof paper, steel strip and sea worthy export packing |
| End Connection | Beveled End | Wall Thickness | 12.70 mm SCH40S |
| Delivery Time | 7-10 days for stock sizes, 20-25 days for production | Standard | ASME B16.9 |
| product name | Solution Annealed WP321H Stainless Reducer | Size | 20 Inch x 16 Inch |
| Model Number | SSR-RD-321H-20IN | Place of Origin | Cangzhou, Hebei, China |
| Certification | ISO 9001:2015, PED 2014/68/EU, EN 10204 3.1 | Brand Name | HENGYU |
| High Light | Solution Annealed Reducer ，WP321H Heat Resistant Reducer ，20 Inch Stainless Reducer | ||
Titanium-stabilised grades only deliver their elevated-temperature strength when the heat treatment is performed correctly. This stainless steel reducer is formed from WP321H plate, solution annealed at 1050 °C and water quenched, which returns the titanium carbide to solution and leaves a structure that resists sensitisation in the 500 °C to 800 °C band.
Air cooling after hot forming is the usual shortcut — and it is also the reason many 321H fittings fail an intergranular corrosion test on site. Each stainless steel reducer in this series is quenched, then sampled for ASTM A262 Practice E before dispatch, and the heat treatment chart is filed with the certificate.
| Material | ASTM A403 WP321H, UNS S32109, Ti stabilised |
|---|---|
| Size | 20 Inch x 16 Inch, DN500 x DN400 |
| Thickness | SCH40S, SCH80S available |
| Heat Treatment | Solution annealed at 1050 °C, water quenched |
| Standard | ASME B16.9 |
| Service Temperature | Up to 800 °C continuous |
| Corrosion Test | ASTM A262 Practice E, intergranular |
| Ends | Beveled End 37.5 deg |
| Titanium Content | Ti not less than 5 times carbon, per A403 |
Air cooling is too slow above 900 °C, so chromium carbides can precipitate at the grain boundaries. Water quenching suppresses that, which is why the solution annealed condition is specified for 321H service.
Yes. 347H is niobium stabilised and receives the same solution anneal and quench cycle. Both grades are produced for the same high-temperature piping packages.
About 800 °C for continuous service, depending on the design code. Above that, the allowable stress drops sharply and a higher alloy becomes necessary.
Yes. ASTM A262 Practice E is run on a sample from each heat after heat treatment, and the result is reported in the 3.1 certificate.
In a plywood case with the bevel protected and the body strapped, since a 20 inch stainless steel reducer is light enough to be damaged by point loading rather than by weight.
Tell us the design temperature and the piping class, and we will confirm the heat treatment cycle and testing regime for the stainless steel reducer before quoting.
Company Details
Business Type:
Manufacturer,Agent,Importer,Exporter,Trading Company,Seller
Year Established:
1998
Total Annual:
100000-100000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...
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