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Solution Annealed WP321H Stainless Steel Reducer 20 Inch

  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
  • Solution Annealed WP321H Stainless Steel Reducer 20 Inch
Place of Origin Cangzhou, Hebei, China
Brand Name HENGYU
Certification ISO 9001:2015, PED 2014/68/EU, EN 10204 3.1
Model Number SSR-RD-321H-20IN
Minimum Order Quantity 1 Piece
Price USD 210-380 / Piece
Packaging Details Plywood case with waterproof paper, steel strip and sea worthy export packing
Delivery Time 7-10 days for stock sizes, 20-25 days for production
Payment Terms T/T,L/C at sight,D/P at sight
Supply Ability 800 Tons per Month
Product Details
Product Name Solution Annealed WP321H Stainless Reducer Application Elevated Temperature Steam And Exhaust Line
Material Grade ASTM A403 WP321H, UNS S32109 Size 20 Inch X 16 Inch
Thickness SCH40S Wall Thickness 12.70 Mm SCH40S
Heat Treatment Solution Annealed At 1050 C, Water Quenched Standard ASME B16.9
Test Intergranular Corrosion Test ASTM A262 Practice E End Connection Beveled End
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Solution Annealed Reducer

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WP321H Heat Resistant Reducer

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20 Inch Stainless Reducer
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Product Description
Solution Annealed WP321H Stainless Steel Reducer, 20 x 16 Inch

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.

Technical Specification
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
Design, Inspection and Application Highlights
  • Correct anneal cycle: solution annealing at 1050 °C followed by water quenching is what separates a serviceable 321H stainless steel reducer from one that cracks after two thermal cycles.
  • Stabilised chemistry: titanium at five times the carbon content ties up carbon as TiC, so chromium stays in solution and the weld zone keeps its corrosion resistance.
  • Verified by test: every lot passes ASTM A262 Practice E, and the heat treatment chart with furnace number and soak time is supplied.
  • Dimensional stability: the reducer is supported on a fixture through the quench, so the H dimension and roundness hold after the thermal cycle.
  • Application fit: steam superheat lines, exhaust manifolds, furnace ducting, heat exchanger shells and annealing furnace piping.
Frequently Asked Questions
Why does the stainless steel reducer need water quenching rather than air cooling?

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.

Can you supply 347H with the same treatment?

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.

What is the maximum working temperature of this fitting?

About 800 °C for continuous service, depending on the design code. Above that, the allowable stress drops sharply and a higher alloy becomes necessary.

Is an intergranular corrosion test included?

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.

How is a 20 inch fitting packed for export?

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.

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