Material Data Sheet

Please select a material application among SM series and proprietary grades.

High Collapse, High Strength - SM-110T

Coupling: White, Red
Pipe body: White, Red
General description

SM-110T is a Carbon steel OCTG material that provides enhanced and guaranteed Collapse resistance compared to API ratings. In addition SM-110T production order is delivered with a Collapse proof test.

API Collapse rating is an empirical guideline derived from Collapse testing results, on a statistical scale and conservatively using a worst case scenario approach. Actual Collapse resistance of OCTG seamless pipe is affected by a large number of parameters. Nippon Steel has developed an unrivaled know-how in mastering the most influential parameters, and interlocking with best-in-class quality control, tighter than API 5CT/ISO 11960.

Diameters: 4 1/2” to 13 5/8”. Larger diameters available upon request.

Weights: as per API 5CT/ISO 11960

Special application: Please contact Nippon Steel engineer, should You require specific size, weight, drift, or any other information.

Reference document
  • Proprietary SM-T  series.TGP-2944 (latest revision)
  • API 5CT / ISO 11960
  • API 5C3 / ISO 10400
  • API 5C1 / ISO 10405
  • VAM Book
Applicable environment

External Pressure driven applications:

  • Salt dome / clastic formation
  • High Pressure - High Temperature well (HP-HT)
  • Wildcat drilling 
  • Deep well

In addition, enhanced collapse resistance can offer well design flexibility where controls of string weight and wall thickness are critically important:

  • Tight clearance applications such as contingency drilling liners
  • Oversized Drift for intermediate and production Casing
  • Deep Offshore applications where slim and light design is critical

For each SM-110T production run, a Collapse test is carried out with the same frequency as the tensile test using state-of-the-art testing procedure.

In case Sour Service performances are required, SMC110T shall be considered.

For a more detailed assessment please contact Nippon Steel engineers.

Manufacturing
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
Specified mechanical properties
YIELD STRENGTH
KSI		 TENSILE STRENGTH
KSI		 ELONGATION
%		 HARDNESS
HRC		 TECHNICAL NOTE
Min Max Min  Min Max  
110 140 125 API Formula N/A Collapse: Refer to MDS / Tech Info
Physical and thermal properties
  UNIT 25°C 50°C 100°C 150°C 200°C 250°C
Density Kg/m3 7800 7790 7780 7760 7750 7730
Young's modulus GPa 213 211 209 206 203 200
Poisson's Ratio - 0.3 0.29 0.29 0.29 0.29 0.28
Tensile strength de-rating % 100.0 98.3 95.5 94.4 94.7 94.7
Yield strength de-rating % 100.0 99.3 96.4 91.7 90.3 88.2
Thermal Diffusivity x10-6 m2/s 12.30 12.30 11.90 11.30 10.60 9.96
Heat Capacity x106 J/m3 deg.C 3.61 3.79 3.83 3.97 4.15 4.34
Thermal Conductivity W/m deg.C 44.4 46.7 45.6 44.8 44.0 43.3
Specific Heat J/Kg deg.C 463 487 492 511 535 562
Thermal expansion x10-6 / deg.C - 12.5 12.4 12.6 12.8 13.0
Technical information

Pipe dimensions such as Diameter (D) or wall thickness (t) and mechanical characteristics such as the material Yield Strength are the first parameters dictating tubular Collapse resistance. Figure 1 specifically illustrates the commensurate influence of the D/t ratio (Diameter over wall thickness).

Nippon Steel, on SM-T High Collapse series, applies tighter tolerances to influential parameters, such as ovality, eccentricity, OD and wall thickness. In addition, a specific chemistry and strict heat treatment control are used to ensure steel structural homogeneity and low residual stresses.

Figure 1 demonstrates SM-110T enhanced performances compared to API P110 collapse resistance (derived from API 5C3 / ISO 10400 formula), through its physical test results, guaranteeing the published minimum Collapse ratings.

Collapse pressure on SM-110T versus API P10

Fig. 1 : Collapse pressure on SM-110T versus API P10

Table 2 features SM-110T High Collapse values for a large selection of pipe sizes. They exceed API P110 collpase ratings by a factor ranging from +15% to +45%.

Table 2 : SM-110T High Collapse values

SM110T table

Table 2 covers most common sizes and wall thicknesses; upon request Nippon Steel can provide larger sizes up to 16", specific or tailor-made sizes, weights or special drifts.

For additional information about material performances please contact Nippon Steel engineers.

Case history from the field

Upon request, Nippon Steel can provide historical supply of SM-T materials.

Storage and handling procedure

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.

For more specific information please contact Nippon Steel engineers.