- OCTG
Material Data Sheet
New Sour Service - SM-140MS
SM-140MS is a low alloy High Strength Carbon steel OCTG material suitable for Mild Sour Service severity applications. SM-140MS is a Sulfide Stress Cracking (SSC) resistant material quality controlled through testing in accordance with NACE TM0177 method A, in solution B (pH3.5) with 0.01 bar H2S, using an applied stress of 85% SMYS.
Diameters: 4-1/2” to 14” Weights: as per API 5CT/ISO 11960 Special application: Please contact Nippon Steel engineer. You require specific size, weight, drift, or any other characterization.
・Proprietary SM-140MS. TGP-5262 (latest revision)
・ API 5CT / ISO 11960
・ NACE MR0175 / ISO 15156-2
・ API 5C1 / ISO 10405
・ NACE TM0177
・ VAM® Book
This material has been extensively SSC qualified in accordance with NACE TM0177 method A using 90% AYS for region 2 (‘Medium Sour Service Severity’ region), as defined by NACE MR0175/ISO15156. Figure 1 first illustrates SM-140MS pH/H2S domain diagram. Its primary function is intermediate and production Casing application.
For each manufactured SM-140MS heat, SSC resistance is verified through QC testing in accordance with NACE TM0177 method A, in solution B(pH3.5) with 0.01 bar H2S, using an applied stress of 85% SMYS.
SM-140MS is a low alloy sour service material; consequently SM-140MS can be susceptible to metal loss corrosion if exposed to a wet dynamic acid gas containing environment, such as CO2.
For a more detailed assessment please contact NIPPON STEEL engineers.
| PROCESS | DESCRIPTION |
|---|---|
| Steel making | Ladle refined, fully killed and vacuum degassed; continuously cast to a fine grained practice |
| Pipe making | Seamless |
| Heat treatment | Quenched and Tempered |
| YIELD STRENGTH KSI |
TENSILE STRENGTH KSI |
ELONGATION % |
HARDNESS HRC |
TECHNICAL NOTE | |
|---|---|---|---|---|---|
| Min | Max | Min | Min | Max | |
| 140 | 150 | 140 | API Formula | 38.0 | Application: H2S < 0.01 bar* Tested: 85% SMYS, 0.01bar H2S, NACE A, Sol-B |
| UNIT | 25°C | 50°C | 100°C | 150°C | 200°C | 250°C | 300°C | |
|---|---|---|---|---|---|---|---|---|
| Density | Kg/m3 | 7830 | 7820 | 7810 | 7790 | 7780 | 7760 | 7740 |
| Young's modulus | GPa | 214 | 213 | 211 | 208 | 205 | 201 | 197 |
| Poisson's Ratio | - | 0.29 | 0.29 | 0.29 | 0.29 | 0.29 | 0.29 | 0.29 |
| Tensile strength de-rating | % | 100.0 | 98.6 | 96.9 | 96.0 | 95.5 | 95.5 | NA |
| Yield strength de-rating | % | 100.0 | 99.3 | 95.5 | 91.6 | 88.3 | 85.9 | NA |
| Thermal Diffusivity | x10-6 m2/s | 12.2 | 12.1 | 11.6 | 11.1 | 10.5 | 10.0 | 9.4 |
| Heat Capacity | x106 J/m3 deg.C | 3.46 | 3.80 | 3.98 | 4.12 | 4.25 | 4.36 | 4.47 |
| Thermal Conductivity | W/m deg.C | 42.2 | 46.0 | 46.3 | 45.9 | 44.9 | 43.9 | 42.4 |
| Specific Heat | J/Kg deg.C | 442 | 486 | 510 | 528 | 546 | 562 | 577 |
| Thermal expansion | x10-6 / deg.C | - | 11.5 | 11.8 | 12.3 | 12.7 | 13.1 | 13.3 |
*This information is not the minimum value for guarantee but the typical value for each material and grade.
Health, Safety and Environment
While state-of-the-art HSE rules are applied throughout Nippon Steel manufacturing process, proprietary and specific HSE regulations shall be applied along the life cycle of the pipe until it reaches its final position in the well, according to each operator’s rules. This particularly applies to all phases of handling and transportation, assembly on the rig floor, and rig return if applicable. OCTG are heavy and by nature unstable. Special care shall be paid to potential risks of injury whenever handling OCTGs. Walking on pipes shall be avoided at all times. Usage of Personal Protection Equipments (PPE) is mandatory. Equipment and procedures will be established to capture the possible wastes generated during maintenance (cleaning, coating, doping) and disposed according to local regulations. This applies in particular to storage dope, running dope, or cleaning water wastes.
Best practices for transportation, handling and storage of OCTG in general are covered by ISO 10405 / API RP5C1. VAM® Book is also a good source of handling practices for VAM® connections. In addition to these general rules, specific care is recommended pertaining to SM-140MS, because improper handling could affect the material performances and by extension the corrosion resistance:
・ Prevention of Spot Hardening
For more specific information, please contact Nippon Steel engineers