COMMON TRADE NAMES: 25CRS, 25CRW, SM25CRW®, VM® 25S, SAF® 2507, Duplex 2507, Z100
W.Nr 1.4410 / W.Nr 1.4501
Super Duplex 25 Chrome grades, 25CRW & 25CRS, are cold hardened duplex stainless steels intended for corrosion resistance in sweet (CO2) and moderately sour (H2S) environments with high chloride content, requiring high strength up to 450°F.
The “Super” designation indicates that it has a Pitting Resistance Equivalence (PREN) ≥40. This provides increased resistance to H2S and localized corrosion from high chlorides and/or oxygen relative to standard 25 Chrome. It is therefore a common choice for use as tubing and liner in seawater and water injection wells. However, all environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
These alloys are classified in MR0175/ISO15156 as duplex stainless steels having a Pitting Resistance Equivalent Number ≥40, suitable for H2S partial pressure ≤3.0 psi.
MIN OD: 2-1/16″ (2.0625″)
MAX OD: 10-3/4″ (10.750”)
MAX WALL THICKNESS: 1.925”
LENGTHS: R1, R2, R3
END FINISH: Plain end, Premium threads, & API threads
Standard & Non-Standard Sizes Available.
Manufactured Material Available as Quickly as 1 Week.
Non-Standard Mill Quantities Accommodated
