VM 25 125

VM 25125.png

VM 25 125 is a Corrosion Resistant Alloy. It is iron based plus main alloying elements Cr, Ni and Mo. The PRE is above 37.5. Structure is Duplex (austenite and ferrite). VM 25 125 is delivered in cold work condition. It can be hardened by drawing or pilgering.

​APPLICATIONS

VM 25 125 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 25 125 can be used as tubing or casing.

​PERFORMANCES

VM 25 125 has been tested from room to high temperature for SCC and SSC with different levels of H2S.​

​Typical Chemical composition

UNS​C​CrNiMoNPRE​
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.

125 (862)150 (1034)130 (896)10%​​36

Control hardness through wall   ​

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

​3.0

4.0

​5.0

6.0​

​​6.0​

PHYSICAL PROPERTIES

Physical properties & evolution with temperature ​

Chara​cteristic

Unit

Temperature (°C)

2550100150200250
Yield Streng​th
derating
%1.0000.9670.9210.8870.8610.841
Ultimate 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 s-13.683.7​63.924.094.254.42
Thermal expansionx 10-6 / deg. C -13.213.4​​13.513.713.9
Poisson's ratio- 0.3     
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

FIELD RECORDS

  • ​North Africa: e.g. ​4 1/212.6VAM TOP®​5 1/2​17# VAM TOP® HTTM
  • ​​​North Sea​: e.g. 4 1/218,9VAM TOP®, 5" 23,2​#​ VAM TOP®
  • Africa: e.g. 5 1/2" 20# VAM TOP®
  • North Sea: 7" 42,7# VAM TOP®

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​​​​.

 
 

Brochu​​res​​​

OCTG Product Selection Guide​​​​​​​​

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