VM 25 140

VM 25140.png

VM 25 140 is a CRA - Corrosion resistant Alloy. It is iron base plus main alloying elements Cr, Ni and Mo. The PRE is above 37.5. Structure is Duplex (austenite and ferrite). VM 25 140 is delivered in cold work condition. It can be hardened by drawing or pilgering.

​APPLICATIONS​​

VM 25 140 is recommended when pCO2 is above 2psi / 0.14bar with chlorine. Acceptable temperature is up to 450°F / 232°C. Some partial pressure of H2S is acceptable depending on temperature of use.

VM 25 140 can be used as tubing or casing.

​PERFORMANCES

VM 25 140 has been tested from room to high temperature for SCC and SSC with different levels of H2S.​

​Typical Chemical composition

UNS​CCrNiMoNPRE​
S312600,003 max​24-265.7-7.52.5-3.5​0.1-0.3≥ 37.5

​​PRE=Pitting Resistance Equivalent = %Cr + 3.3 %Mo + 1.65 % W + 16 % N

D​ensity = 7.81kg/dm3

MECHANICAL PROPERTIES 

After cold work

​​Yield Strength 

Ksi (​MPa)​

​Ultimate Tensile

Strength ksi (MPa)  

​Elongation
​%   
Mean ​Hardness
HRC 

​​​Min.

​Max.

​​Min.

​ Min.

​ Max.

140 (965)160 (1103)145 (1000)​9%

​​38

Control hardness through wall   ​

​Less than 0.357"
(Less than 9.00mm)
​0.354" to 0.499"
(9.00 to 12.69mm)
​0.500" t​o ​0.759" 
(12.70 to 19.04mm)
​0.750" to 0.999"
(19.05 to 25.39mm)
1000" and above
(25.40mm and above)

​3.0

4.0

​5.0

6.0​

​​6.0​

​​PHYSICAL PROPERTIES

Physical properties & evolution with temperature   ​

Ch​aracteristic

Unit


 

Temperature (°C)

​ ​ ​ ​ ​
2550100150200250
Yield Streng​th
derating
%1.0000.9670.9210.8870.8610.841
Ultima​te Tensile Strength
derating
%1.0000.9720.9320.9020.8800.862
Thermal conducti​​​vityW m-1 K-1 14.3714.6614.9717.1517.8018.44
Thermal diffusivityx 10-6 m²s-13.683.763.924.094.254.42
Thermal expansionx 10-6 / deg. C-13.213.413.513.713.9
Poisson's ratio-      
Young's modulusGPa188.9 187.2184.2181.2177.9175.1
Resistivitynano Ohm.m89691294397310041034
Specific heat capacityJ.g-1.K-10.500.500.490.540.540.54​

STORAGE & HANDLING RECOMMENDATION

Avoid pollution by contact from carbon or low alloy steel (pipes or parts).

Avoid atmospheric pollution with iron (e.g. concrete plant).

Please refer to the VAM® BOOK​.

 
 

Broch​u​​res​​​

OCTG Product Selection Guide​​​​​​​​​​

MOBILE​​ APP​

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