Yuhong Group Co.,Ltd
| Payment Terms | L/C,T/T |
| Schedule | Sch 10s to Sch XXS |
| Type | Seamless / Welded |
| Size | 1/2" to 36" |
| Product Name | Cap |
| Packaging Details | Ply-wooden Case /Pallet |
| High Light | ASTM A403 WP304H Stainless Steel End Cap, B16.9 Buttweld Pipe Fittings |
| Delivery Time | 7 DAYS |
| Technique | Cold Drawn |
| Material | 304H, 1.4948 |
| Standard | ASTM A403, ASME SA403 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Brand Name | YUHONG |
| Place of Origin | CHINA |
| Model Number | ASTM A403 WP304H Stainless Steel End Cap |
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Product Specification
| Payment Terms | L/C,T/T | Schedule | Sch 10s to Sch XXS |
| Type | Seamless / Welded | Size | 1/2" to 36" |
| Product Name | Cap | Packaging Details | Ply-wooden Case /Pallet |
| High Light | ASTM A403 WP304H Stainless Steel End Cap, B16.9 Buttweld Pipe Fittings | Delivery Time | 7 DAYS |
| Technique | Cold Drawn | Material | 304H, 1.4948 |
| Standard | ASTM A403, ASME SA403 | Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Brand Name | YUHONG | Place of Origin | CHINA |
| Model Number | ASTM A403 WP304H Stainless Steel End Cap | ||
| High Light | ASME B16.9 stainless steel end cap ，ASTM A403 WP304H pipe fittings ，buttweld stainless steel pipe fittings | ||
ASTM A403 WP304H End Cap ANSI/ASME B16.9 Stainless Steel Buttweld Pipe Fitting
YUHONG GROUP is a specialized manufacturer of stainless steel buttweld pipe fittings, and our ASME SA403 / ASTM A403 WP304H End Cap (manufactured in compliance with ASME B16.9) is one of our most demanded products. WP304H is a high‑carbon version of 304 stainless steel (C content 0.04–0.10%), offering superior creep strength and oxidation resistance at elevated temperatures – ideal for sealing pipe ends in high‑temperature service (e.g., superheater headers, boiler manifolds, petrochemical reactors).
Our end caps and full range of buttweld fittings (elbows, tees, reducers, caps) are produced from premium seamless or welded pipe, then solution annealed, pickled, and 100% inspected.
Equivalent Grades of ASTM A403 WP304H End Cap ASME B16.9 Stainless Steel Buttweld Pipe Fittings
| EN | SS/ UNS | JIS | AFNOR | GOST | ISO |
| X6CrNi18-10 (1.4948) | 304H/ UNS S30409 | SUS304H | Z6CN18-09 | 08KH18N10 | X7CrNi18-9 |
Chemical Compositions% of ASTM A403 WP304H End Cap ASME B16.9 Stainless Steel Buttweld Pipe Fittings
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304H | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 18 – 20 | - | 8 – 10.5 | - |
Mechanical Properties of ASTM A403 WP304H End Cap ASME B16.9 Stainless Steel Buttweld Pipe Fittings
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40% |
Why WP304H for End Caps?
High‑temperature strength – retains good creep rupture strength up to ~800°C. Used in superheater outlet headers, reheater piping, furnace coils.
Oxidation resistance – forms stable Cr₂O₃ scale.
Not susceptible to embrittlement – austenitic structure remains tough.
Carbon content (0.04–0.10%) – improves creep strength compared to standard 304, but may lead to sensitization if welded improperly. Therefore, welding must use low heat input and filler metal like AWS E/ER308H.
Applications
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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