Stainless Steel 321 / 321H Flanges Manufacturer, Supplier, and Stockists in India

Samay Steel and Engineering Co. is a prominent manufacturer, stockist, and exporter of high-quality Stainless Steel 321 / 321H Flanges, offering durable and heat-resistant solutions for demanding industrial applications. Stainless Steel 321 is a titanium-stabilized austenitic stainless steel known for its excellent resistance to intergranular corrosion after welding and its stability at high temperatures. Stainless Steel 321H is the high-carbon version of 321, designed to provide improved high-temperature strength and creep resistance, making both grades ideal for use in thermal processing and pressure systems.

The company manufactures a complete range of Stainless Steel 321 / 321H Flanges, including weld neck, slip-on, socket weld, blind, threaded, and lap joint flanges. These flanges are produced in accordance with international standards such as ASTM A182 and ASME B16.5, ensuring superior mechanical performance, dimensional accuracy, and long-lasting service. Due to their high resistance to oxidation and scaling at elevated temperatures, 321/321H flanges are commonly used in exhaust systems, heat exchangers, furnace components, and chemical processing equipment.

Samay Steel and Engineering Co. maintains a large and ready inventory of Stainless Steel 321 / 321H Flanges in various pressure classes (150#, 300#, 600#, etc.), sizes, and face types like RF (Raised Face), FF (Flat Face), and RTJ (Ring Type Joint). Each flange is subjected to rigorous quality checks including hydro testing, PMI testing, and dimensional inspections to ensure compliance with client specifications and international quality standards. Their advanced manufacturing and testing capabilities enable them to deliver both standard and custom flange solutions.

With a strong global supply chain, Samay Steel and Engineering Co. exports its Stainless Steel 321 / 321H Flanges to major markets including Oman, Qatar, Saudi Arabia, UAE, and Kuwait in the Middle East; Spain and Germany in Europe; the USA and Canada in North America; and several industrial regions across Africa. Their reliable logistics, technical expertise, and commitment to timely delivery have made them a preferred supplier to a wide range of industries including oil and gas, power generation, marine, and refineries.

Stainless Steel 321 / 321H FlangesP Specifications

Specification	Details
Material Grades	Stainless Steel 321 / 321H
Standards	ASTM A312, ASTM A213, ASTM A269, ASTM A249, ASTM A358
Type	Seamless, Welded, ERW, Fabricated
Form	Round, Square, Rectangular, U Tube, Hydraulic
Outer Diameter	6.00 mm – 914.4 mm
Wall Thickness	0.5 mm – 20 mm
Length	Single Random, Double Random, Cut-to-Length
Surface Finish	Annealed & Pickled, Bright Annealed, Polished
End Types	Plain End, Beveled End, Threaded
Manufacturing Process	Cold Drawn, Hot Rolled, Welded
Application Industries	Heat Exchangers, Furnace Components, Petrochemical, Power Plants, Aerospace
Certifications	EN 10204 3.1 / 3.2, ISO 9001, NACE MR0175, PED

Samay Steel and Engineering Co. is driven by a focus on quality, innovation, and customer satisfaction. Their Stainless Steel 321 / 321H Flanges are trusted for their thermal stability, corrosion resistance, and robust performance in high-stress environments. Backed by years of engineering experience and a dedicated team, the company continues to provide cost-effective and reliable flange solutions to customers worldwide, ensuring long-term value and operational efficiency.

As the demand for high-performance stainless steel materials continues to grow globally, Samay Steel and Engineering Co. remains a trusted partner for Stainless Steel 317L Pipe & Tube solutions. Their dedication to product excellence and comprehensive service makes them a preferred choice for industries requiring reliable and corrosion-resistant piping materials.

Chemical Composition of Stainless Steel 321 / 321H Flanges

Element	SS 321 (%)	SS 321H (%)
Carbon (C)	≤ 0.08	0.04 – 0.10
Manganese (Mn)	≤ 2.00	≤ 2.00
Phosphorus (P)	≤ 0.045	≤ 0.045
Sulfur (S)	≤ 0.030	≤ 0.030
Silicon (Si)	≤ 1.00	≤ 1.00
Chromium (Cr)	17.0 – 19.0	17.0 – 19.0
Nickel (Ni)	9.0 – 12.0	9.0 – 12.0
Titanium (Ti)	≥ 5×C (min 0.20%)	≥ 5×C (min 0.20%)
Iron (Fe)	Balance	Balance

Mechanical Properties of Stainless Steel 321 / 321H Flanges

Property	SS 321	SS 321H
Tensile Strength (MPa)	≥ 515	≥ 515
Yield Strength 0.2% (MPa)	≥ 205	≥ 205
Elongation (% in 50mm)	≥ 35	≥ 35
Hardness (Brinell HB max)	≤ 217	≤ 217
Modulus of Elasticity	~193 GPa	~193 GPa
Density	7.90 g/cm³	7.90 g/cm³
Melting Point	1398 – 1446 °C	1398 – 1446 °C
Creep Resistance	Good	Improved (due to higher carbon)

Types of Pipes and Tubes

Cities we supply Pipes & Tubes in India :-

Countries we export Pipes & Tubes worldwide :-