ASTM A358 Pipe Manufacturer

Midland Alloys Inc. is a reliable Indian producer and international supplier of ASTM A358 pipe, providing a large selection of grades, and sizes to satisfy important piping requirements of various industries. As a prominent ASTM A358 Pipe stockist in Mumbai,India, we maintain an extensive inventory that complies with international standards. Our ASTM A358 pipes are produced using electric fusion welding (EFW) of austenitic stainless steel and are ideal for both corrosive and high-temperature environments. To ensure consistent tensile strength, ductility, and performance under pressure, the ASTM A358 specification specifies the mechanical properties, chemical composition requirements and, pipe classes. We provide pipes in the most widely used type, ASTM A358 Class 2, which has a double-welded construction and a complete radiographic inspection. Each pipe meets stringent dimensional tolerances and comes with mill test certificates confirming confirming compliance to ASTM A358 material standards.

Benefits of ASTM A358 Pipe

ASTM A358 Pipe offers exceptional reliability for demanding applications in the power, chemical, and refinery industries. Known for its metallurgical consistency and clean weld seams, this pipe type performs well in high-stress environments.

Outstanding resistance to scaling and oxidation at high temperatures
Superior resistance to corrosion in environments, with high levels of acidity and chloride
Mechanical reliability is enhanced by a high strength-to-weight ratio.
A smooth interior surface improve flow and reduces pressure loss.
Simple to fabricate, weld and install in complicated or constrained systems
Over time, a long service life reduces maintenance expenses.
Cost-effective for process piping and extensive industrial use

The difference Between ASTM A312 and A358

Stainless steel pipes are specified by ASTM A312 and ASTM A358, however, their applications and manufacturing procedures are different. ASTM A312 covers seamless and welded stainless steel pipes used mainly in high-pressure or structural settings, while ASTM A358 specification applies exclusively to electric-fusion-welded (EFW) austenitic stainless steel pipes. ASTM A358 pipes are generally larger in diameter and wall thickness and are preferred for low-pressure, corrosive, and high-temperature services such as chemical processing and power generation. Additionally, ASTM A358 Class 2 pipes undergo full radiographic testing, making them suitable for critical fluid transmission lines, whereas ASTM A312 typically does not require radiographic examination unless specified.

Technical Specifications of ASTM A358 Pipe

Types of ASTM A358 Pipe

Manufacturing Types

Seamless Pipe

Weld-free, perfect for even strength and sizing precision.
Welded Pipe

Welded from flat-rolled steel, widely used where economy and large sizes are required.
ERW Pipe

Electric Resistance Welded (ERW) pipes provide neat, high quality weld seams and are ideal for medium-pressure applications.
EFW Pipe

Electric Fusion Welded (EFW) pipes are welded by fusion welding, usually applied in larger diameters and high-demand processes.
LSAW

Longitudinal Submerged Arc Welded (LSAW) pipes provide straight seam welding which is favored for thick-wall pieces and structural requirements.

Pipe Forms

Round Pipe

The most common shape for fluid and gas transport.
Square Pipe

Used in architectural and structural applications requiring angular profiles.
Rectangular Pipe

Provides greater strength in load-bearing regions and flat structures.
Hydraulic Pipe

Designed to provide precise dimensional control for fluid systems under pressure.

Contact Midland Alloys Inc. for Your ASTM A358 Pipe Needs

Contact us today to discuss how ASTM A358 Pipe can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.

Technical Details & Delivery Condition

Chemical Composition of ASTM A358 Pipe

Grade	C	Mn	P	S	Si	Cr	Ni	Mo
304	0.08	2	0.045	0.03	1	18.0 – 20.0	8.0 – 11.0	–
304L	0.035	2	0.045	0.03	1	18.0 – 20.0	8.0 – 13.0	–
316	0.08	2	0.045	0.03	1	16.0 – 18.0	11.0 – 14.0	2.0 – 3.0
316L	0.035	2	0.045	0.03	1	16.0 – 18.0	10.0 – 14.0	2.0 – 3.0

Mechanical Property of ASTM A358 Pipe

Material	Yield Strength Ksi (MPa), Min.	Temperature Min. °F (°C)	Tensile Strength Ksi (MPa), Min.	Heat Treatment	Elongation
304	30(205)	1900 (1040)	75(515)	Solution	35
304L	25(170)	1900 (1040)	70(485)	Solution	35
316	30(205)	1900 (1040)	75(515)	Solution	35
316L	25(170)	1900 (1040)	70(485)	Solution	35

Equivalent Grades of ASTM A358 Pipe

STANDARD	WERKSTOFF NR.	AFNOR	UNS	BS	JIS	GOST	EN
SS 304	1.4301	Z7CN18-09	S30400	304S31	SUS 304	08X18H10	X5CrNi18-10
SS 304L	1.4306 / 1.4307	Z3CN18-10	S30403	3304S11	SUS 304L	03X18H11	X2CrNi18-9 / X2CrNi19-11
SS 316	1.4401 / 1.4436	Z7CND17-11-02	S31600	316S31 / 316S33	SUS 316	–	X5CrNiMo17-12-2 / X3CrNiMo17-13-3
SS 316L	1.4404 / 1.4435	Z3CND17-11-02 / Z3CND18-14-03	S31603	316S11 / 316S13	SUS 316L	03Ch17N14M3 /03Ch17N14M2	X2CrNiMo17-12-2 /X2CrNiMo18-14-3

Stainless Steel Pipe Grades We Also Offer

Stainless Steel 304/304L Pipes

Stainless Steel 310/310S Pipes

Stainless Steel 316/316L Pipes

Stainless Steel 316Ti Pipes

Stainless Steel 317/317L Pipes

Stainless Steel 321/321H Pipes

Stainless Steel 347/347H Pipes

Stainless Steel 904L Pipes

Stainless Steel 253MA Pipes

SMO 254 Pipes

ASTM A358 PIPES

ASTM A778 PIPES

Pipe Dimensions

Thickness Chart

Pipe Dimensions

Thickness Chart

How ASTM A358 Pipe Are Manufactured

Round Bar

Analytic

Cut to Length

Centering

Heating

Perforation

Inspection of Size

Pickling

Inspection of Surface

Lubricating

Cold Drawing (Cold Rolling)

Degreasing

Annealing

Straightening

Cut

Pickling / Passivating

Inspection

Analytic

Marking

Packing & Shipping

Applications of ASTM A358 Pipe

ASTM A358 Pipe’s have strong mechanical properties and superior resistance to corrosion are particularly useful for various industrial sectors. These pipes are utilized in chemical and petrochemical facilities to transport corrosive substances such as acids, alkalis, and chlorides. Refineries and power plants depend on these pipes for transporting high-temperature steam, condensates, and boiler feedwater. They are extensively used in pulp and paper mills, food processing units, and desalination systems where clean welds and smooth finishes are essential. The ASME SA 358 304 version is especially appropriate for heat exchanger systems, and general process piping. In both onshore and offshore settings, their strength, and weldability make them perfect for fabrication in high capacity fluid systems and pressure vessels.

Offshore Industry

Nuclear Industries

Refineries

Ship Building

Aerospace

Pharmaceutical

Why Choose ASTM A358 Pipe from Midland Alloys Inc.

Midland Alloys Inc. is a well-known Indian producer and exporter of premium ASTM A358 pipe known for its meticulously designed products that meets the global material standards. As an ISO-certified company, we ensure every pipe aligns with industry expectations for chemical and mechanical consistency. In order to meet complex project requirements, we can provide customized options such as cut-to-length, specific end finishes, customized surface treatments and special wall thickness schedules. We provide quick delivery services to customers worldwide in the Gulf, Europe, Africa and Southeast Asia. All products undergo rigorous in-house testing, mill certification, and third-party inspection to guarantee safety and reliability. Whether your order is small or bulk, we offer project-specific support and expert handling. Our commitment to long-term client satisfaction is backed by superior product marking, compliance with ASTM/ASME standards, and supply of Mill Test Certificates (MTC) validating full chemical and mechanical properties.

FAQ - ASTM A358 Pipe

How do ASTM A358 Class 1 and Class 2 pipes differ from one another?

Class 1 pipes are 100% radiographically checked and single-welded. Class 2 pipes offer increased strength, and dependability as they are double-welded, and radiographically tested.

Do grade and size affect the cost of ASTM A358 pipe?

Yes, the grade (e.g., ASME SA 358 304), pipe size, wall thickness and quantity all affect the cost. The ultimate cost may also be impacted by custom requirements.

Is it possible to use ASTM A358 material in applications requiring cryogenic, or sub-zero temperatures?

Although ASTM A358 material can withstand high temperatures, its application in low-temperature settings needs to be confirmed using the particular alloy grade, and design specifications.

Products Categories

ISO Certificate

Stainless Steel OD mm	Pipe WT mm	in.	Sch	Kg/m
13.72	1.65	1/4	10S	0.50
13.72	2.24	1/4	40S	0.64
13.72	3.02	1/4	80S	0.81
17.15	1.65	3/8	10S	0.64
17.15	2.31	3/8	40S	0.86
17.15	3.20	3/8	80S	1.12
21.34	2.11	1/2	10S	1.02
21.34	2.77	1/2	40S	1.29
21.34	3.73	1/2	80S	1.65
26.67	2.11	3/4	10S	1.30
26.67	2.87	3/4	40S	1.71
26.67	3.91	3/4	80S	2.23
33.40	2.77	1	10S	2.13
33.40	3.38	1	40S	2.54
33.40	4.55	1	80S	3.29
33.40	6.35	1	160	4.30
42.16	2.77	1¼	10S	2.73
42.16	3.56	1¼	40S	3.44
42.16	4.85	1¼	80S	4.53
42.16	6.35	1¼	160	5.69
48.26	2.77	1½	10S	3.16
48.26	3.68	1½	40S	4.11
48.26	5.08	1½	80S	5.49
60.33	2.77	2	10S	3.99
60.33	3.91	2	40S	5.52
60.33	5.54	2	80S	7.60
60.33	8.74	2	160	11.29
73.03	3.05	2½	10S	5.35
73.03	5.16	2½	40S	8.77
73.03	7.01	2½	80S	11.59
88.90	3.05	3	10S	6.56
88.90	5.49	3	40S	11.47
88.90	7.62	3	80S	15.51
88.90	11.13	3	160	21.67
101.60	3.05	3½	10S	7.53
101.60	5.74	3½	40S	13.78
101.60	8.08	3½	80S	18.92
114.30	3.05	4	10S	8.50
114.30	6.02	4	40S	16.32
114.30	8.56	4	80S	22.67
114.30	13.49	4	160	34.05
141.30	6.55	5	40S	22.10
141.30	9.53	5	80S	31.44
141.30	15.88	5	160	49.87
168.28	3.40	6	10S	14.04
168.28	7.11	6	40S	28.69
168.28	10.97	6	80S	43.21
168.28	14.27	6	120	54.75
168.28	18.26	6	160	68.59
219.08	8.18	8	40S	43.20
219.08	12.70	8	80S	65.63
219.08	18.23	8	120	91.30
219.08	23.01	8	160	112.97

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8	0.405	10.3	0.095	2.41	0.31	0.47
1/4	0.54	13.7	0.119	3.02	0.54	0.8
1/2	0.84	21.3	0.147	3.73	1.09	1.62
3/4	1.05	26.7	0.154	3.91	1.47	2.2
1	1.315	33.4	0.179	4.55	2.17	3.24
1 1/4	1.66	42.2	0.191	4.85	3	4.47
1 1/2	1.9	48.3	0.2	5.08	3.63	5.41
2	2.375	60.3	0.218	5.54	5.02	7.48
2 1/2	2.875	73	0.276	7.01	7.66	11.41
3	3.5	88.9	0.3	7.62	10.25	15.27
3 1/2	4	101.6	0.318	8.08	12.5	18.63
4	4.5	114.3	0.337	8.56	14.98	22.32
5	5.563	141.3	0.375	9.53	20.78	30.97
6	6.625	168.3	0.432	10.97	28.57	42.56
8	8.625	219.1	0.5	12.7	43.39	64.64
10	10.75	273	0.594	15.09	64.43	96.01
12	12.75	323.8	0.688	17.48	88.63	132.08
14	14	355.6	0.75	19.05	106.13	158.1
16	16	406.4	0.844	21.44	136.61	203.53
18	18	457	0.938	23.83	170.92	254.55
20	20	508	1.031	26.19	208.87	311.17
24	24	610	1.125	30.96	296.58	442.08