Alloy Steel Pipe Fittings - Product Overview

Hars Tubes Fittings is a trusted manufacturer, supplier, and exporter of premium-quality alloy steel pipe fittings available in various ASTM-grade materials. We offer seamless and welded pipe fittings engineered to deliver superior strength, high-temperature resistance, and long-lasting corrosion protection. Our products ensure excellent dimensional accuracy, enhanced durability, and reliable performance—making them suitable for Oil & Gas, Petrochemical, Refinery, Power Generation, and High-Temperature industrial applications. All fittings are manufactured in compliance with ANSI, ASME, DIN, and EN international standards to guarantee optimum functionality and unmatched quality.

Alloy Steel Pipe Fittings – Grades & Specifications

Specifications : ASTM A234 WP1 / WP5 / WP9 / WP11 / WP22 / WP91 – Alloy Steel

Types : Elbows (45° / 90°), Tee, Concentric Reducer, Eccentric Reducer, End Cap, Stub End

Size Range : 1/2" (15 NB) to 48" (1200 NB)

Schedule : Sch 10, Sch 20, Sch 40, Sch 80, Sch 160, XXS

Standards :

ASME B16.9, ASME B16.11, MSS-SP-75

Ends : Beveled Ends (BE), Plain Ends (PE), Threaded Ends

We Specialize In : Butt-Weld Fittings, Socket Weld Fittings, Screwed Fittings, Large Diameter Alloy Steel Elbows & Reducers

Carbon Steel Elbow

Carbon Steel Buttweld Fittings

Carbon Steel Tee

AS Welded Pipe Fittings Schedule Chart

Schedule	Size (Inch)	Wall Thickness (Inch)	Outside Diameter (O.D.) (Inch)	Reducer Dim(ID)	Reducer Dim(OD)
Sch 10	2″	0.154	2.375	2.067	2.375
	1″	0.109	1.315	1.103	1.315
	1/2″	0.083	0.840	0.670	0.840
	4″	0.237	4.500	4.026	4.500
Sch 80	2″	0.218	2.375	1.939	2.375
	1″	0.179	1.315	0.957	1.315
	1/2″	0.147	0.840	0.546	0.840
	4″	0.337	4.500	3.826	4.500
Sch 40	2″	0.154	2.375	2.067	2.375
	1″	0.140	1.315	1.035	1.315
	1/2″	0.109	0.840	0.622	0.840
	4″	0.237	4.500	4.026	4.500
Sch 160	2″	0.375	2.375	1.625	2.375
	1″	0.300	1.315	0.715	1.315
	1/2″	0.218	0.840	0.404	0.840
	4″	0.500	4.500	3.500	4.500

Alloy Steel Pipe Fittings Specification

Standards

ASTM A234
ASME SA234

Sizes

Welded: 24” – 96”
Seamless: 1/2” – 24”
Schedule: SCH 10 – SCH 160, XXH

Product Forms

Elbow
Tee
Reducer
Cap

Manufacturing Process

Welded
Seamless
Fabricated

Material Origin

Japanese
European
Korean
American

Finish & Coatings

PE Coated
3PE Coating

Applications

Power Generation
Gas Processing
Pharmaceuticals
Condensers

Testing

PMI Test
NDT Test
HIC Tested
Ultrasonic Test

Features

High Strength
Corrosion Resistance
Superior Manufacturing Quality

Dimension Chart of Alloy Steel Pipe Fittings

Diameter Nominal	Schedule 10S			Schedule 40S			Schedule 80S
Diameter Nominal	Reducing tee	Ecc reducer	Con reducer	Reducing tee	Ecc reducer	Con reducer	Reducing tee	Ecc reducer	Con reducer
50×40	0.76	0.31	0.31	1.15	0.45	0.45	1.43	0.59	0.59
150×80	6.86	1.82	1.82	9.68	3.95	3.95	11.57	5.51	5.51
50×25	0.73	0.28	0.28	1.10	0.40	0.40	1.37	0.54	0.54
80×50	1.56	0.55	0.55	2.91	1.00	1.00	3.91	1.79	1.79
100×80	3.04	0.87	0.87	4.64	1.74	1.74	6.79	2.33	2.33
150×100	7.10	1.96	1.96	11.94	4.07	4.07	11.97	5.96	5.96
200×100	13.46	3.01	3.01	17.98	6.55	6.55	24.18	9.23	9.23
40×25	0.60	0.19	0.19	0.76	0.26	0.26	0.90	0.34	0.34
100×50	2.94	0.78	0.78	4.48	1.50	1.50	6.55	1.95	1.95
200×150	14.08	3.19	3.19	18.82	6.74	6.74	25.31	10.12	10.12

Nominal Pipe Sizes (Inch)	Outside Daimeter (O.D.)		ASME B16.9 Straight Cross	ASME B16.9 Straight Tee	ASME B16.9 Pipe End Cap	ASME B16.9 Long And Short Stub Ends
Nominal Pipe Sizes (Inch)	(Inch)	(mm)	Center to End (Inch)	Center to End (Inch)	Length (Inch)	Short Length (Inch)	Long Length (Inch)	Lap Diameter (Inch)
3/4″	1.050	26.7	–	1 1/8	1	2	3	1 11/16
1 1/4″	1.660	42.2	1 7/8	1 7/8	1 1/2	2	4	2 1/2
5″	5.563	141.3	4 7/8	4 7/8	3	3	8	7 5/16
8″	8.625	219.1	7	7	4	4	8	10 5/8
2″	2.375	60.3	2 1/2	2 1/2	1 1/2	2 1/2	6	3 5/8
3″	3.500	88.9	3 3/8	3 3/8	2	2 1/2	6	5
4″	4.500	114.3	4 1/8	4 1/8	2 1/2	3	6	6 3/16
6″	6.625	168.3	5 5/8	5 5/8	3 1/2	3 1/2	8	8 1/2
10″	10.750	273.1	8 1/2	8 1/2	5	5	10	12 3/4
1/2″	0.840	21.3	–	1	1	2	3	1 3/8
1 1/2″	1.900	48.3	2 1/4	2 1/4	1 1/2	2	4	2 7/8
1″	1.315	33.4	1 1/2	1 1/2	1 1/2	2	4	2
2 1/2/”	2.875	73.0	3	3	1 1/2	2 1/2	6	4 1/8
3 1/2″	4.000	101.6	3 3/4	3 3/4	2 1/2	3	6	5 1/2
12″	12.750	323.9	10	10	6	6	10	15

Class 150 Of 4140 Low AS Equal Tee Dimensions Chart

Nominal Pipe Size’s (Inch)	Diameter		Weight in Kg
Nominal Pipe Size’s (Inch)	(B)	(A)	Weight in Kg
1/4″	0.80	0.80	0.10
1-1/4″	2.07	1.72	0.76
2″	2.86	2.25	1.49
1/2″	1.17	1.11	0.22
1″	1.74	1.43	0.52
1-1/2″	2.36	1.87	0.99
2-1/2″	3.57	2.68	2.78
3/4″	1.38	1.24	0.32
3″	4.23	3.05	4.41
1/8″	0.66	0.69	0.06
3/8″	0.97	0.94	0.15
4″	5.24	3.72	6.72

Most Common Types of Alloy Steel Pipe Fittings

4140 Low AS Equal Tee

Chromoly AS Concentric Reducer

Chrome Alloy Steel Cap

ASTM A234 Alloy Steel Eccentric Reducer

Alloy Steel Pipe Short Stub End

High Alloy Steel Lap Joint Stub Ends

Chromoly 4130 5D Elbow

Chromoly 45° Long Radius Elbow

Alloy Steel Elbow 90 DEGREE

AS Fittings Size Chart

Outside Diameter (O.D.) (Inch)	Nominal Diameter (Inch)	Equivalent Decimal	Typical Threads In Inch
13/32″	1/8	0.405	27
2-7/8″	2-1/2	2.875	8
1-29/32″	1-1/2	1.900	11-1/2
43/64″	3/8	0.675	18
1-3/64″	3/4	1.050	14
1-21/32″	1-1/4	1.660	11-1/2
2-3/8″	2	2.375	11-1/2
3-1/2″	3	3.500	8
27/32″	1/2	0.840	14
4″	3-1/2	4.000	8
5/16″	1/16	0.313	27
35/64″	1/4	0.540	18
1-5/16″	1	1.315	11-1/2
4-1/2″	4	4.500	8

SA 234 Fittings Standard

Standard	Alloy Steel
AISI 4340	UNS G43400
AISI 4130	UNS G41300
AISI 8620	UNS G86200
AISI 4140	UNS G41400

Class 300 of High Alloy Steel Equal Cross Dimensions Chart

Nominal Pipe Sizes in Inches	Diameter		Weight in Kg
Nominal Pipe Sizes in Inches	(B)	(A)	Weight in Kg
1/4″	0.81	0.69	0.12
1-1/4″	2.07	1.28	0.85
2″	2.85	1.61	1.61
1/2″	1.16	0.87	0.25
1″	1.74	1.11	0.58
1-1/2″	2.36	1.38	1.12
2-1/2″	3.57	1.93	2.36
3/4″	1.38	0.96	0.36
3″	4.23	2.15	3.44
1/8″	0.65	0.62	0.08
3/8″	0.96	0.75	0.19
4″	5.24	2.58	5.42

Pressure Rating of Chromoly AS Reducing Cross

Temperature Ratings		Pressure Class
		150	300
			2 1/2 – 3″	1 1/4 – 2″	1/4 – 1″
(°C)	(°F)		2 1/2 – 3″	1 1/4 – 2″	1/4 – 1″
-29 to 66	-20 to 150	300	1000	1500	2000
177	350	150	650	900	1150
232	450	–	475	600	725
149	300	185	735	1050	1360
93	200	265	910	1350	1785
204	400	–	560	750	935
260	500	–	385	450	510
121	250	225	825	1200	1575
288	550	–	300	300	300

Alloy Steel Reducers Weight Chart

Nominal Pipe Sizes	Schedule 10S			Schedule 40S			Schedule 80S
Nominal Pipe Sizes	B16.9 Equal Tee	Elbow 45 Deg	Elbow 90 Deg	B16.9 Equal Tee	Elbow 45 Deg	Elbow 90 Deg	B16.9 Equal Tee	Elbow 45 Deg	Elbow 90 Deg
10	0.05	0.02	0.03	0.03	0.02	0.03	0.09	0.04	0.06
90	2.67	0.75	1.70	4.08	1.42	2.83	5.44	2.00	4.00
150	8.07	2.72	5.45	10.99	5.44	10.89	13.61	8.16	16.32
20	0.13	0.03	0.07	0.17	0.04	0.08	0.20	0.05	0.11
32	0.49	0.11	0.23	0.59	0.17	0.26	0.68	0.23	0.40
50	0.85	0.25	0.50	1.28	0.4	0.70	1.59	0.59	0.91
80	1.77	0.63	1.25	3.31	1.08	2.20	4.45	1.50	2.97
100	3.46	1.08	2.10	5.27	2.09	4.47	7.71	2.81	6.18
200	15.65	5.33	10.20	20.91	10.77	21.54	28.12	16.56	33.11
65	1.41	0.48	0.85	2.19	0.77	1.40	3.13	0.99	1.81
250	26.46	9.75	18.15	35.38	19.27	38.56	49.90	25.86	51.71
40	0.68	0.17	0.30	0.86	0.23	0.40	1.02	0.29	0.51
8	0.03	0.01	0.02	0.06	0.02	0.03	0.07	0.03	0.04
25	0.28	0.08	0.14	0.29	0.11	0.15	0.38	0.14	0.22
15	0.09	0.03	0.06	0.10	0.04	0.08	0.14	0.05	0.10
300	39.46	13.62	25.80	62.14	29.71	59.42	83.91	39.69	79.38

Nominal Pipe Sizes	Schedule 10S			Schedule 40S			Schedule 80S
Nominal Pipe Sizes	Reducing And Unequal Tee	Eccentric Pipe Reducer	Concentric Pipe Reducer	Reducing And Unequal Tee	Eccentric Pipe Reducer	Concentric Pipe Reducer	Reducing And Unequal Tee	Eccentric Pipe Reducer	Concentric Pipe Reducer
150 x 80	6.86	1.82	1.82	9.68	3.95	3.95	11.57	5.51	5.51
100 x 50	2.94	0.78	0.78	4.48	1.50	1.50	6.55	1.95	1.95
50 x 25	0.73	0.28	0.28	1.10	0.40	0.40	1.37	0.54	0.54
80 x .50	1.56	0.55	0.55	2.91	1.00	1.00	3.91	1.79	1.79
100 x 80	3.04	0.87	0.87	4.64	1.74	1.74	6.79	2.33	2.33
150 x 100	7.10	1.96	1.96	11.94	4.07	4.07	11.97	5.96	5.96
200 x 100	13.46	3.01	3.01	17.98	6.55	6.55	24.18	9.23	9.23
40 x .25	0.60	0.19	0.19	0.76	0.26	0.26	0.90	0.34	0.34
50 x 40	0.76	0.31	0.31	1.15	0.45	0.45	1.43	0.59	0.59
200 x 150	14.08	3.19	3.19	18.82	6.74	6.74	25.31	10.12	10.12

Alloy Steel Pipe Fittings