COMMON TRADE NAMES: 25 Chrome Duplex, 25Cr, Chromium-25, SM25CR®, VM® 25, 2507, Duplex 2507
Chromium-25 offers increased resistance to the effects of CO2 , chlorides, pH, and temperatures relative to 22 Chrome allowing use as downhole tubular components, casing, packers, and other subsurface equipment in deeper wells with high-pressure and high-temperature (HPHT) conditions where pitting corrosion from high chlorides are a concern. Chromium-25 is often utilized in critical Class VI well projects involving CCUS.
This alloy is classified in MR0175/ISO15156 as a duplex stainless steel having a Pitting Resistance Equivalent Number ≤40, suitable for H2S partial pressure ≤0.3 psi.
C | Cr | Ni | Fe | Mn | Si | Mo | Cu | P | S | W | N |
---|---|---|---|---|---|---|---|---|---|---|---|
≤ 0.03 | 24 - 26 | 5.5 - 7.5 | BAL | ≤ 1 | ≤ 0.75 | 2.5 - 3.5 | 0.2 - 0.8 | ≤ 0.03 | ≤ 0.03 | 0.1 - 0.5 | 0.1 - 0.3 |
PROCESS | DESCRIPTION |
---|---|
Steel Making | Made by electric furnace process or blast furnace followed by Vacuum Oxygen Decarburization (VOD) process or Argon Oxygen Decarburization (AOD) Process |
Pipe Making | Manufactured by traditional tube manufacturing processes, High strength tubulars should be furnished in cold worked condition |
Heat Treatment | Solution Annealing Process before final cold drawing |
API 5CRA / ISO 13680 Group 2 Category 25-7-3
Grade | Yield Strength ksi | Tensile Strength ksi | Elongation % | Hardness HRC | NACE MR0175/ISO 15156 H2S Sour Service Limits |
||
min | max | min | min | max | |||
65 | 65 | 90 | 90 | 25 | 26 | Table A.24 (annealed) | H2S ≤ 3.0 psi, Temp ≤ 450°F |
75 | 75 | 100 | 90 | 25 | 26 | ||
110 | 110 | 140 | 125 | 11 | 36 | Table A.25 (cold-worked) | H2S ≤ 3.0 psi |
125 | 125 | 150 | 130 | 10 | 36 | ||
140 | 140 | 160 | 145 | 9 | 38 | 140 Grade not recommended for sour service |
70°F | 200°F | 400°F | ||
---|---|---|---|---|
Density | lbs/in3 | 0.28 | ||
Thermal Expansion | X10-6/°F | 7 | 7.5 | 8 |
Elastic Modulus | psi x 106 | 29 | 28.2 | 27 |
Poisson Ratio | 0.24 | 0.24 | 0.24 | |
Thermal Conductivity | Btu/ft h °F | 8 | 9 | 10 |
Specific Heat | Btu/lb °F | 0.12 | 0.12 | 0.12 |
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
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