V & M 95 Sour Service grades - 95 ksi series

Introducing proprietary grades: VM 95 SS - VM 95 SS-D - VM 95 S - VM 95 HCSS - VM95 HCS

In sour environments, the presence of H2S can trigger sulfide stress-cracking ( SSC ) at stresses below the resistance of OCTG products in non-corrosive environments. While T95 was introduced as sour service grade into API in 1989, V&M has long produced 95 ksi proprietary grades for sour service, compliant with the NACE MR0175/IS015156 norm and guaranteeing SSC resistance.

As an integrated supplier, V&M now offers a range of sour service products up to 125 ksi, based on optimized combinations of steelmaking, rolling and heat treatment, controlled to the most stringent quality program, with final SSC resistance proven through NACE TMOl77 testing, and supported by an extensive history of more than 10 000 tests.

MAIN BENEFITS compared to T95

Additional resistance to SSC

Availability in high collapse sour service grades (VM 9S HCS and VM 9S HCSS)

Main Features

VM 9S SS

Maximum SSC resistance proven through 90% SMYS NACE A test
Reference product with full API5CT compliance

VM 9S S

Reduced lead time without time-consuming NACE test based on controlled process and historical testing record
Additional SSC resistance vs T95 warranted to 85 % SMYS

VM 9S SS-D

State of the art API 5CT compliant product tested to both NACE A ( 90% SMYS ) and NACE-D
NACE D warrantee: Kiscc > 33 ksi.in 1/2 average value superior to T95 (30 ksi.in 1/2)

Technical Features

Fully integrated enhanced production process

Selected steels with chemistry control tighter than API
Clean process with low P and 5 content, low residual elements
Homogeneous quenching up to 2" wall thickness (coupling stocks )

Improved microstructure

More than 90% fine tempered martensite
Grain size finer than 8 ASTM
Low inclusion levels

Low stress-state

Yield strength range: 95 to 110 ksi
Average Hardness: < 25 HRC
Uniform through-wall hardness

Wall thickness	< 0.5"	0.501" - 0.749"	0.750" - 0.999"	> 1"
Max HRC variation	3	4	5	6

Optimal quality control

standardized to PSL 2
PSL3 available on demand
Quality control to API SR2 minimum, 100% NDE testing

Field history

V&M 95 ksi sour service grades have been largely used in combination with VAM TOP and other V&M proprietary connections:

85% of V&M 95 ksi 55 supply are proprietary grades
Close to 50% are supplied in combination with high collapse
Widely used for critically sour wells in Middle East, Caspian area and China as well as North Sea HPHT wells
Some references :
- Saudi ARAMCO (Middle East)
- OKIOC-Kashagan (Caspian)

Technical references

With more than 20 dedicated scientists working in 3 R&D laboratories, V&M has a long history of international publications. Below are a few key references for 95 ksi SS material.

[1] DCB test: a review of critical parameters - 1999 NACE conference
[2] Experience in Corrosion Testing according to NACE standard TMOl77 Methods A and Don T95 grade steel for OCTG - 2000 NACE Conference
[3] NACE TMOl77 Method D test procedure (DCB), Learnings from comparative laboratory testing - 2003 NACE Conference Please contact us for a er co ies or full reference list.