Name: ASME SA403 / ASTM A403 WP304H End Cap ASME B16.9 Stainless Steel Buttweld Pipe Fittings
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A403 WP304H Stainless Steel End Cap
Price: 100000 USD
Availability: InStock

Yuhong Holding Group Co.,LTD

English

Home

Products

About Us

Factory Tour

Quality Control

Company News

Home Products Steel Fitting

ASME SA403 / ASTM A403 WP304H End Cap ASME B16.9 Stainless Steel Buttweld Pipe Fittings

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	ASTM A403 WP304H Stainless Steel End Cap

Payment & Shipping Terms:

Minimum Order Quantity:	1PC
Packaging Details:	Ply-wooden Case /Pallet
Delivery Time:	7 DAYS
Payment Terms:	L/C,T/T

Contact Now

All Products

Stainless Steel Seamless Pipe (337)

Stainless Steel Seamless Tube (328)

Duplex Stainless Steel Pipe (134)

Duplex Stainless Steel Tube (40)

Needle Tube (163)

Fin Tube (712)

Heat Exchanger (31)

Heat Exchanger Tube (468)

Heat Exchanger Tube Bundle (50)

Heat Exchanger Tubesheet (126)

Heat Exchanger Baffle (39)

Air Cooler (13)

Pressure Vessel (4)

Stainless Steel Welded Pipe (61)

Stainless Steel Welded Tube (132)

Nickel Alloy Pipe (276)

Nickel Alloy Tube (104)

Copper Alloy Tube (252)

Alloy Steel Tube (212)

Titanium Tube (21)

Bright Annealed Tube (174)

Boiler Tube (153)

Steel Fitting (866)

Steel Flange (663)

Others (408)

Cladding Parts (9)

Detailed Product Description

Product Name:	Cap	Standard:	ASTM A403, ASME SA403
Material:	304H, 1.4948	Size:	1/2" To 36"
Schedule:	Sch 10s To Sch XXS	Technique:	Cold Drawn
Type:	Seamless / Welded
High Light:	ASTM A403 WP304H Stainless Steel End Cap, B16.9 Buttweld 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