ASTM A234 Alloy Steel 45°, 90°, 180° Elbow, Piggable Bend, Lap Joint Stub End Pipe Fittings : ASME/ANSI B16.9, B16.28, MSS-SP-43

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AS BW LR & SR Elbow Specifications

Dimensions:
ASME/ ANSI B16.9 | ASME B16.28 | MSS-SP-43 | BS1560 | BS4504 | BS10.
Size:
1/2"NB TO 48"NB IN.
Type:
Seamless and Welded.
Thickness:
Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS.
Form:
Elbow, Equal Tee, U Pipe Bend, Long & Short Stub End, Caps, Lap Joint Stub End
ASTM Standard / Grades:
ASTM A234 / ASME SA234 WP1 , WP11 , WP12 , WP22 , WP5 , WP9 , WP91

ISO Certified Manufacturer of Alloy Steel Buttweld Long & Short Stub End, Hot Induction Bend, U Bend, End Cap Pipe Fittings - Seamless 1/2″～24″ Inch and ERW, Welded, Fabricated 1/2″～48″Inch.

Alloy steel buttweld fittings are vital components in piping systems where high strength, resistance to corrosion, and suitability for high-pressure and high-temperature applications are required. These fittings are typically manufactured from alloy steels such as ASTM A234 WP5, WP9, WP11, WP22, and WP91, among others, each designated for specific service conditions.

Alloy steel fittings excel in demanding industrial environments due to their superior mechanical properties compared to carbon steel, ensuring exceptional strength and durability. These fittings are alloyed with chromium, molybdenum, and nickel, enhancing their corrosion resistance essential for applications exposed to corrosive fluids or environments. They also maintain mechanical integrity and performance at elevated temperatures, making them indispensable for applications in refineries, chemical plants, and power generation facilities where high temperature resistance is paramount.

Manufacturing alloy steel pipe fittings involves sourcing high-quality alloy steel tailored to specific industrial needs. Processes include forging or forming to shape fittings like elbows and tees, followed by machining for precise dimensions. Heat treatments enhance mechanical properties, ensuring durability under high pressures and temperatures. Rigorous quality control measures ensure fittings meet stringent industry standards for reliability and performance in sectors such as oil and gas, chemical processing, and power generation.

Equivalent Grades of Alloy Steel Elbow Fittings

ASTM Grade	DIN	EN	JIS	BS
WP1 / P1	1.5415	16Mo3	STPA 22	3604
WP11 / P11	1.7335	13CrMo4-5	STPA 23	3605
WP12 / P12	1.7338	12CrMo19-5	STPA 24	3606
WP22 / P22	1.7380	10CrMo9-10	STPA 24	6208
WP5 / P5	1.7362	5CrMo12	STPA 25	6205
WP9 / P9	1.7386	9CrMo44	STPA 26	6209
WP91 / P91	1.4903	X10CrMoVNb9-1	STPA 28	6209

Chemical Composition of Alloy Steel Buttweld Tee

Grade	C (max)	Mn	P (max)	S (max)	Si	Cr	Mo	Ni (max)	V (max)	Other Elements
WP1 / P1	0.28	0.30-0.80	0.025	0.025	0.10-0.50	-	0.44-0.65	0.40	-	-
WP11 / P11	0.05-0.15	0.30-0.60	0.025	0.025	0.50	1.00-1.50	0.44-0.65	0.40	-	-
WP12 / P12	0.05-0.15	0.30-0.61	0.025	0.025	0.50	0.80-1.25	0.45-0.65	0.40	-	-
WP22 / P22	0.05-0.15	0.30-0.60	0.025	0.025	0.50	2.00-2.50	0.87-1.13	0.40	-	-
WP5 / P5	0.15	0.30-0.60	0.025	0.025	0.50	4.00-6.00	0.45-0.65	0.40	-	-
WP9 / P9	0.15	0.30-0.60	0.025	0.025	0.25-1.00	8.00-10.00	0.90-1.10	0.40	-	-
WP91 / P91	0.08-0.12	0.30-0.60	0.020	0.010	0.20-0.50	8.00-9.50	0.85-1.05	0.40	0.18-0.25	Nb: 0.06-0.10, N: 0.03-0.07

Mechanical Properties of Alloy Steel Fittings

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
WP1 / P1	≥ 415	≥ 205	≥ 30	≤ 143
WP11 / P11	≥ 415	≥ 205	≥ 30	≤ 163
WP12 / P12	≥ 415	≥ 220	≥ 30	≤ 163
WP22 / P22	≥ 415	≥ 205	≥ 30	≤ 163
WP5 / P5	≥ 415	≥ 205	≥ 30	≤ 187
WP9 / P9	≥ 415	≥ 205	≥ 30	≤ 187
WP91 / P91	≥ 585	≥ 415	≥ 20	≤ 250