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Girgaon, Mumbai - 400004
Stainless Steel 304H Welded Pipes
Stainless Steel 304H Welded Pipe Manufacturer & Stockist in India
For piping systems operating under continuous high-temperature conditions, material selection plays a vital role in ensuring long-term reliability and operational safety. Kamal Steels Manufactures and Stocks Stainless Steel 304H Welded Pipes that are specifically developed for elevated temperature service, where improved creep strength, oxidation resistance and structural stability are essential. Manufactured in accordance with ASTM A312 and ASME SA312 standards using Stainless Steel 304H (UNS S30409 / WNR 1.4948), our welded pipes deliver dependable performance in demanding industrial environments.
The controlled higher carbon content of Stainless Steel 304H enhances its mechanical strength at elevated temperatures while maintaining the corrosion resistance and fabrication characteristics of the 304 stainless steel family. These properties make SS 304H Welded Pipes an excellent choice for boilers, heat exchangers, pressure vessels, refineries, petrochemical plants, power generation facilities and thermal processing equipment where prolonged exposure to heat is common.
At Kamal Steels, every Stainless Steel 304H Welded Pipe is manufactured using certified raw materials and subjected to stringent quality inspections to ensure dimensional accuracy, weld integrity and consistent performance. Backed by extensive ready stock, project-specific manufacturing capabilities and timely delivery, we provide reliable piping products for industrial projects across India and international markets.
Stainless Steel 304H Welded Pipe Specifications
| Product | Stainless Steel 304H Welded Pipe |
|---|---|
| Material Grade | 304H (UNS S30409) |
| Standard | ASTM A312 / ASME SA312 |
| Dimensions | ASTM, ASME & API |
| Outside Diameter | 1/8" NB to 24" NB |
| Wall Thickness | SCH 5S to SCH XXS |
| Length | Single Random, Double Random & Custom Cut Length |
| Pipe Type | Welded, ERW, EFW, Fabricated |
| End Type | Plain End, Beveled End, Threaded |
| Surface Finish | Annealed, Pickled, Polished, Bright Annealed |
Features & Benefits of Stainless Steel 304H Welded Pipes
Available Size Range
Available Pipe Schedules
| Pipe Schedule | Availability |
|---|---|
| SCH 5S | ✔ Available |
| SCH 10S | ✔ Available |
| SCH 20 | ✔ Available |
| SCH 40S | ✔ Available |
| SCH 60 | ✔ Available |
| SCH 80S | ✔ Available |
| SCH 120 | ✔ Available |
| SCH 160 | ✔ Available |
| XS | ✔ Available |
| XXS | ✔ Available |
Surface Finish of Stainless Steel 304H Welded Pipes
Stainless Steel 304H Welded Pipes are available in a variety of surface finishes to suit industrial, commercial and high-temperature applications. Each finish is carefully processed to improve corrosion resistance, appearance and durability.
| Surface Finish | Description |
|---|---|
| Annealed & Pickled | Removes scale and restores corrosion resistance after heat treatment. |
| Bright Annealed (BA) | Smooth, bright finish produced in a controlled atmosphere. |
| Polished | Available in various grit finishes for decorative and hygienic applications. |
| Mill Finish | Standard industrial finish supplied directly after manufacturing. |
Manufacturing Standards
Our Stainless Steel 304H Welded Pipes are manufactured in accordance with internationally recognized standards to ensure superior quality, dimensional accuracy and reliable performance in high-temperature environments.
| Standard | Description |
|---|---|
| ASTM A312 | Seamless, Welded and Heavily Cold Worked Stainless Steel Pipes |
| ASME SA312 | Pressure Pipe Specification |
| ASTM A358 | Electric Fusion Welded Stainless Steel Pipe |
| ASTM A778 | Unannealed Austenitic Stainless Steel Tubular Products |
| ASME B36.19M | Stainless Steel Pipe Dimensions |
| ASME B36.10M | Welded and Seamless Steel Pipe Dimensions |
Stainless Steel 304H Welded Pipe Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 0.75 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 8.00 – 10.50 |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel 304H Welded Pipe
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa Minimum |
| Yield Strength (0.2% Offset) | 205 MPa Minimum |
| Elongation | 35% Minimum |
| Hardness | 92 HRB Maximum |
| Density | 8.0 g/cm³ |
| Melting Range | 1400 – 1450°C |
Equivalent Grades of Stainless Steel 304H Welded Pipe
| Standard | Grade |
|---|---|
| ASTM / ASME | 304H |
| UNS | S30409 |
| Werkstoff No. | 1.4948 |
| EN | X6CrNi18-11 |
| JIS | SUS 304H |
| ISO | 11 |
Applications of Stainless Steel 304H Welded Pipes
Stainless Steel 304H Welded Pipes are specifically engineered for elevated temperature service where excellent oxidation resistance and creep strength are required. Their superior mechanical properties make them suitable for demanding industrial environments.
Kamal Steels supplies Stainless Steel 304H Welded Pipes to customers across India and international markets. Every pipe is manufactured using premium raw materials, tested to international quality standards and supplied with complete inspection documentation to ensure dependable performance in critical applications.
Frequently Asked Questions
Stainless Steel 304H Welded Pipe is a high-carbon austenitic stainless steel pipe specifically designed for elevated temperature applications. It provides excellent oxidation resistance, improved creep strength and reliable performance in high-pressure and high-temperature environments.
The main difference is the carbon content. Stainless Steel 304H contains a higher carbon level than standard 304, which enhances high-temperature strength, creep resistance and durability in continuous heat service.
SS 304H Welded Pipes are manufactured according to ASTM A312, ASTM A358, ASTM A778, ASME SA312, ASME B36.19M and ASME B36.10M standards to ensure superior quality and dimensional accuracy.
Stainless Steel 304H Welded Pipes are available from 1/8" NB to 24" NB in schedules including SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XS, and XXS. Custom sizes and lengths are also available.
These pipes offer excellent oxidation resistance, superior high-temperature strength, enhanced creep resistance, good weldability, excellent mechanical properties and long service life in demanding industrial environments.
SS 304H Welded Pipes are widely used in boilers, heat exchangers, power plants, petrochemical industries, refineries, pressure vessels, chemical processing plants and other high-temperature process piping systems.
Each pipe undergoes Hydrostatic Testing, PMI (Positive Material Identification), Radiographic Testing, Eddy Current Testing, Flattening Test, Visual Inspection and Dimensional Inspection to ensure compliance with international standards.
Yes. Stainless Steel 304H Welded Pipes are supplied with EN 10204 3.1 Mill Test Certificates (MTC). Third-party inspection certificates are also available upon customer request.
Yes. We supply customized outside diameters, wall thicknesses, schedules, lengths, end preparations and surface finishes according to project specifications.
Kamal Steels is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel 304H Welded Pipes. We offer premium quality products, certified raw materials, competitive pricing, strict quality control, fast delivery, complete documentation and reliable worldwide export services.