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API 13%Cr-110 / SM13CRM-110

Material Data Sheet

General description

API 13% Cr-110 / SM13CRM is a Martensitic OCTG material often referred to as Modified 13

Chrome. Martensitic stainless steels are suitable for sweet (CO2) environments, under which

standard Carbon and low alloy steels would suffer general and/or localized corrosion. SM13CRM has

been developed with the main objective of being able to offer a high strength material while offering

improved corrosion properties and larger application domain with regards to temperature and

Chloride concentration over standard API L80-13CR.

SM13CRM-110 is manufactured based on API 5CT / ISO 11960.

Diameters: 2-3/8 16"

Weights: as per API 5CT/ISO 11960

Reference document

Proprietary SM13CRM series.TGP-2220 (latest revision)

API 5CT / ISO11960

API RP 5C1 / ISO 10405

Appl icable environment

CO2 Corrosive well service, with temperatures up to 180 C and high Chlor ide content.

Its primary functions are Tubing and Liner applications, sections permanently exposed to production

fluids. SM13CRM is typically fit for deeper and HP-HT sweet applications thanks to its higher

temperature threshold (up to 180C) and increased Yield Strength compared to API L80-13CR.

API 13% Cr-110 / SM13CRM also features excellent localized corrosion resistance in sweet

environment, low pH, and High Chloride content. SM13CRM is particularly indicated after formationwater breakthrough.

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SM13CRM has limited SSC (Sulfide Stress Cracking) resistance and its usage shall be limited to sweet

environment. In case SSC resistance is required,SM13CRS or higher grade material shall be

considered.

Final material application will depend upon CO2, Temperature, pH and expected Chlorides content.

In addition, compatibility with packer & completion fluids (brines and additives), matrix acidizing fluids,

and scale dissolvers need to be ascertained.

Manufacturing

Process Description

Steel making Fine grained fully killed steel billets by the basic oxygen converter

process or electric arc furnace process

Pipe making Seamless

Heat treatment Quenched and Tempered

Chemical Composition

(mass %)

C Si Mn Ni Cr Mo

0.03 0.50 1.00 4.0 ~ 6.0 11.0 ~ 14.0 0.2 ~ 1.2

Specified mechanical properties

Yield strength

ksi

Min Max

Tensile

strength

ksi

Min

Elongation

%

Min

Hardness

HRC

Max

Technical Note

110 125 110 API Formula 32.0 -

Physical and thermal properties

unit 25C 50C 100C 150C 200C 250C

Density Kg/m3 7680 7670 7660 7650 7640 7620

Young's modulus GPa 204 204 202 199 196 192

Poisson's Ratio - 0.29 0.30 0.30 0.30 0.30 0.29

Tensile st rength

de-rating%

100.0 95.7 91.8 87.7 85.6 83.5

Yield strength

de-rating%

100.0 94.7 91.1 86.7 84.5 82.6

Thermal Diffusivity x10-6 m2/s 4.78 4.83 4.99 5.05 5.06 5.07

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unit 25C 50C 100C 150C 200C 250C

Heat Capacity

Thermal Conductivity

Specific Heat

Thermal expansion

x106 J/m 3

W/m deg.C

J/Kg deg.C

x10-6 / deg.C

3.38 3.53 3.62 3.80 3.96 4.13

16.2 17.0 18.0 19.2 20.0 20.9

440 460 472 497 518 542

- 11.0 10.7 10.8 10.8 11.0

Technical information

One of the main limitations of conventional API L80-13CR is its capability to withstand High chloride

environments leading to pitting corrosion initiation (see Fig. 1).

Fig. 1: Corrosion rate of 13CR in different NaCl concentrations with CO2

This is basically associated with the fact that conventional API L80-13CR material when exposed to

corrosive environments (CO2) tend to develop a spontaneous Cr-O (Chromium Oxide) passive film

capable to counter further corrosion. This Cr-O film is not sufficiently stable in presence of High

Chlorides and will be breached/disrupted leading to pitting corrosion initiation.

The figure 2 below indicates that in high chloride high temperature environment API L80-13CR cannot

withstand the corrosive environment. In the same conditions SM13CRM corrosion resistance

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performances surpass API L80-13CR and are as good asSM13CRS.

Figure 2: Corrosion resistance comparison of martensitic stainless steel

in high Chloride high temperature sweet environment

Wet CO2 corrosion mechanism (either as metal loss or localized corrosion) on CRA (Corrosion Resistant

Alloys) materials is a temperature dependent phenomenon, increasing with higher temperatures.

Fig. 3: Pitting & General corrosion resistant of 13CR and Super 13CR in sweet environment

Figure 3 demonstrates the superior corrosion resistance of SM13CRM compared to conventional API

L80-13CR under elevated temperatures while offering an alternative solution toSM13CRSmaterial for

usage in sweet environment.

The same figure 3 indicates that SM13CRM material due to an improved chemistry where Molybdenum

and Nickel are added, provides enhanced pitting corrosion resistance.

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Case history from the field

A selection of critical applications of SM13CRM is shown below. These Field records include SM13CRM

material used as Tubing and/or Liner:

Storage and handling procedure

Health, Safety and Environment

While state-of-the-art HSE rules are applied throughout 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 operators 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. In addition to these general rules, specific care is recommended pertaining to SM13CRM,

because improper handling could affect the material performances and by extension the corrosion

resistance:

Prevention of Spot Hardening

Prevention of Iron contamination

Adapted storage equipments and inspection practices, particularly in a wet and saline atmosphere

Adapted running equipments and practices

Prevention of corrosion on rig returns, particularly in presence of completion fluids

MDS refer to SM13CRM NSSMC

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