VR
Position : Home > Blog

EN 1.4550 stainless steel material equivalent

EN 1.4550 is a European stainless steel grade commonly used in the form of seamless and welded pipes for high-temperature and corrosive applications. Known for its excellent oxidation resistance and creep strength, EN 1.4550 is typically used in heat exchanger tubing, furnace parts, and chemical processing equipment.
 

What is EN 1.4550 Equivalent to?

Standard Equivalent Grade
EN (Europe) X6CrNiNb18-10
ASTM / AISI 347 or 347H (UNS S34700 / S34709)
DIN 1.4550
JIS SUS347
GB (China) 0Cr18Ni11Nb

EN 1.4550 pipe Chemical Composition (EN 10088-2)

Element Content (%)
Carbon (C) ≤ 0.08
Chromium (Cr) 17.0 – 19.0
Nickel (Ni) 9.0 – 12.0
Niobium (Nb) ≥ 10 x C (min 1.0)
Manganese (Mn) ≤ 2.0
Phosphorus (P) ≤ 0.045
Sulfur (S) ≤ 0.015
Silicon (Si) ≤ 1.0

What is the difference between EN 1.4550 and 316L?

316L (1.4404) does not contain niobium, and is less resistant to intergranular corrosion after welding. EN 1.4550 (347/347H) is used where high temperature strength and post-weld stability are critical.

 Is 1.4550 stainless steel pipe heat resistant?

Yes. EN 1.4550 is suitable for service up to 850°C, offering better creep resistance than 304 or 316 grades.

 Is 1.4550 stainless steel pipe magnetic?

No. It is an austenitic stainless steel and is generally non-magnetic in the annealed condition.

Can 1.4550 stainless steel be used in pressure vessels?

Yes, it is accepted in EN 10216-5 and EN 13445 for pressure equipment in elevated temperature environments.
 

Common Specifications for EN 1.4550 Pipe

Standard: EN 10216-5 / ASTM A312 / A213

Type: Seamless / Welded Round Pipe

Size Range: 6mm – 610mm OD

Wall Thickness: 1mm – 30mm

Finish: Annealed & Pickled / Polished

End Type: Plain / Beveled / Threaded

Certification: EN 10204 3.1 / 3.2
 

We offer EN 1.4550 in standard product forms including tubes, pipes, plates, strips, sheets, round bars, flat bars, forgings, hexagonal bars and wires. These products are available in a wide variety of sizes. For detailed specifications and product information, please visit the following website.
Products: https://www.gneestainless.com/

Latest news
What stainless steel products do you need? We’re Ready To Help You!
(+86) 372-5055135
Get A Quote
You may also like these products