Material Martensitic 13%CR s 110

7/25/2019 Material Martensitic 13%CR s 110

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API 13%Cr-110 /SM13CRS-110

Material Data Sheet

General description

API 13%CR-110 / SM13CRS is a Martensitic OCTG material often referred to as Super13 Chrome.

Martensitic stainless steels are suitable for sweet (CO2) environments, under which standard Carbon

and low alloy steels would suffer localized corrosion also called mesa or ringworm corrosion. API

13%CR-110 / SM13CRS bridges the gap of performances between API L80-13CR and Duplex

materials while providing a larger application domain with regards to temperature, H 2S content and

Chloride concentration.

API 13%CR-110 / SM13CRS-110 is manufactured based on API 5CT / ISO 11960 and API

5CRA / ISO 13680

Diameters: 2-3/8 16"

Weights: as per API 5CT/ISO 11960

Reference document

Proprietary SM13CRS series.TGP-2218 (latest revision)

API 5CT / ISO11960

API RP 5C1 / ISO 10405

API 5CRA / ISO 13680

Appl icable environment

CO2 Corrosive well service, with temperatures up to 180 C , including t race amounts of H2S, and

high Chloride content. Its primary function are Tubing and Liner applications, sections permanently

exposed to production fluids.

13%CR-110 / SM13CRS is typically fit for deeper and HP-HT applications thanks to its highertemperature threshold and increased Yield Strength compared to API L80-13CR.

SM13CRS is suitable for limited concentration of H2S, in combination with high content of Chloride with

regards to SSC resistance


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13%CR-110 / SM13CRS also features excellent localized corrosion resistance in high Chloride content

environments while preserving excellent impact toughness values.

Final material application will depend upon CO2, H2S, 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 0.50 5.0 ~ 6.5 11.5 ~ 13.5 1.5 ~ 3.0

UNS Number: S41426

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 7720 7710 7700 7690 7680 7670

Young's modulus GPa 202 201 198 196 193 189

Poisson's Ratio - 0.30 0.30 0.29 0.30 0.30 0.29

Tensile st rength

de-rating

%100.0 96.5 92.8 89.0 87.2 85.4

Yield strength

de-rating%

100.0 96.3 92.2 89.4 87.0 85.1


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

Thermal Diffusivity

Heat Capacity

Thermal Conductivity

Specific Heat

Thermal expansion

x10-6 m2/s

x106 J/m 3

W/m deg.C

J/Kg deg.C

x10-6 / deg.C

4.67 4.71 4.87 4.99 4.99 5.00

3.37 3.38 3.46 3.58 3.72 3.87

15.7 15.9 16.8 17.8 18.5 19.3

436 438 449 465 484 504

- 11.0 10.7 10.7 10.8 10.9

Technical information

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.

Figure 1 below demonstrates the superior corrosion resistance of SM13CRS compared to conventional

API L80-13CR under elevated temperatures:

Fig. 1: Effect of temperature on corrosion resistance of SM13CRS(5%NaCl + 3.0MPa (450psi) CO2 + 0.001MPa (0.15psi) H2S)

Figure 1 shows SM13CRS corrosion resistance capability up to 180C considering a max allowable


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corrosion rate of 0.1 mm/yr.

Figure 1 also demonstrates the lower SSC susceptibility of SM13CRS versus conventional API L80-13Cr,

made here visible at low temperature, with limited amount of H2S corresponding to 0.15 psi, but

significant Chloride content.

SM13CRS is listed in ISO-13680 as part of Group 1, Catergory 13-5-2.

A number of industry experts believe that NACE MR0175 / ISO 15156 applicable SSC domain for API

L80-13CR (H2S < 1.5 psia, pH > 3.5) may be too optimistic, especially in presence of large amount of

Chloride ions.

On the other hand, NACE MR0175/ISO15156 does not differentiate SSC resistance of Conventional API

L80-13CR versus Super 13CR, while the latter material has achieved considerable success in

environments being marginally sour but with high Chloride levels.

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. 2).

Fig. 2: Corrosion rate of 13CR in different NaCl concentrations with CO2

This is basically associated with the fact that conventional L80-13CR 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.

On the other hand, SM13CRS material due to an improved chemistry where Molybdenum and Nickel

are added, provides enhanced pitting resistance as shown in Fig. 3.


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

Case history from the field

A select ion of cri tical applications of SM13CRS is shown below. These Field records include

SM13CRS-95 and SM13CRS-110 material used as Tubing and/or Liner:


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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 SM13CRS,

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 SM13CRS NSSMC

Material Martensitic 13%CR s 110

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