The VAM® Riser grades were developed for the high fatigue conditions experiences in top tension riser systems. Riser grades are available in 95ksi to 125ksi yield strengths They were developed with a API 5CT PSL2 level as a basis, with additional tests specific for riser fatigue usage these enhancements in: chemistry, manufacturing route, hardness, impact toughness, CTOD performance, microstructure control, sulfide stress cracking resistance (for sour service grades), dimensional control, and non-destructive inspectio​n and testing​​​​. 




 Yield Strength​ (ksi)
min          max

Tensile Strength 
min (ksi)

​​​HRC ​value

 Threshold stress min


C​​​olor code


VM 95 R ​95110 ​​​105 ​​≤ 33 ​​N/A
VM95 R.jpg
VM 95 RSS ​95 ​110 ​105≤ 27 ​​​80% SMYS ​VM95 RSS.jpg
​VM 110 R ​110125 ​​120 ​≤ 35 ​N/AVM110 R.jpg
​VM 110 RSS ​110120 ​​120≤ 32 ​​80% SMYS VM110 RSS.jpg
VM 125 R​​125​140​135≤ 37N/AVM125R.jpg