SS 446 Pipes – High-Temperature & Oxidation Resistant Alloy

KVN Steels specialize in the manufacturing, supply, and export of high-performance stainless steel 446 pipes and tubes, engineered to meet the stringent requirements of industrial applications across diverse sectors. These pipes and tubes are produced using premium-grade raw materials and modern fabrication technology, ensuring consistent quality and reliability. Offered in a broad range of sizes, wall thicknesses, and dimensions, our SS 446 products are available in various types—seamless, ERW, fabricated, LSAW, and welded—and in different forms such as round, square, rectangular, and hydraulic. Length options include single random, double random, or custom-cut sizes, with end finishes including plain, beveled, and threaded to accommodate specific project requirements. We proudly serve key markets in India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, the Sultanate of Oman, Iran, and Iraq.

Technical Overview

Stainless steel grade 446 is a high-chromium, ferritic alloy renowned for its exceptional resistance to oxidation, especially in elevated-temperature environments ranging from 1500°F to 2200°F (815°C to 1205°C). Among the 400-series stainless steels, SS 446 and SS 317 317L Pipes and Tubes exhibits superior cyclic oxidation resistance, making it ideal for intermittent high-temperature exposure. Though not known for high-temperature strength, its composition—enhanced with elements like nitrogen for grain refinement—provides excellent thermal stability and resistance to corrosive atmospheres. Additionally, this material performs well in environments exposed to molten copper and brass, adding to its versatility in challenging operating conditions.

Applications & Industry Use

SS 446 pipes and tubes are widely recognized for their excellent tensile strength, dimensional stability, surface finish, corrosion resistance, and long operational life. These features make them a preferred choice in high-temperature and chemically aggressive environments. Common industries utilizing this alloy include petrochemical plants, power generation facilities, oil and gas refineries, pulp and paper mills, construction, and the production of specialty chemicals and pharmaceuticals. Heat exchangers, exhaust systems, and processing equipment are among the key application areas where SS 446 proves its durability and thermal performance. Each batch undergoes rigorous quality testing—including mechanical strength, pitting resistance, and toughness—to ensure compliance with international standards. For safe and secure delivery, products are packaged in sturdy wooden crates or protective bundles.

446 Stainless Steel Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.	EN	JIS
SS 446	S44600	1.4762	X10CrAlSi25	SUS 446

SS 446 Seamless Pipes

ASME SA 312 Stainless Steel 446 Seamless Pipes, UNS S44600 Seamless Pipes, DIN 1.4762 Seamless Pipes

SS 446 Seamless Tubes

ASTM A213 / A213 Stainless Steel 446 Seamless Tube, UNS S44600 Seamless Tubing, DIN 1.4762 Seamless Tubes

SS 446 Welded Pipes

Stainless Steel ASTM A312 TP446 Welded Pipes Supplier, UNS S44600 Welded Pipes, DIN 1.4762 Welded Pipe

SS 446 Welded Tubes

DIN 1.4762 Welded Tubing, UNS S44600 Welded Tube, ASME SA 213 SS 446 Welded Tubing, ASTM A213 Stainless Steel TP446 Welded Tubes

SS 446 EFW Pipes

ASME SA358 SS 446 EFW Pipes, Stainless Steel ASTM A358 TP446 EFW Pipe, SS UNS S44600 EFW Pipes, SS DIN 1.4762 EFW Pipe Exporter

SS 446 ERW Pipes & Tubes

UNS S44600 ERW Pipes, DIN 1.4762 ERW Tubing, ASTM A213 TP446 Stainless Steel ERW Tubes, ASME SA 312 SS 446 ERW Pipe

Stainless Steel Pipe Specification :

ASTM A312, A358 / ASME SA312, SA358

SS Tube Specification :

ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554

Pipe Size :

1/8” NB to 24” NB, 1/4” OD to 24” OD sizes.

Tube Size :

1/2" OD to 8" OD.

Thickness Range :

0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Outside Finish :

2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements

Delivery Condition :

Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Stainless Steel 446 Seamless Pipes And Tubes