Material Data Sheet

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

Application

Grade

Nickel Alloy - SM2242-110

Coupling: Cu Plated, Yellow, Yellow, White

Pipe body: Yellow, Yellow, White

General description

SM2242 is a Austenitic Ni (Nickel) Base OCTG material required for critical well conditions combining high concentrations of CO₂, H₂S and Chlorides. It benefits from Nippon Steel’s unrivaled know-how in manufacturing CRA (Corrosion Resistance Alloys) materials and best-in-class quality control.

SM2242 is manufactured based on API 5CT / ISO 11960 and API 5CRA / ISO 13680.

Diameters: 2 3/8” to 7 5/8” (larger sizes can be available upon request)

Weights: as per API 5CT/ISO 13680. Please note that while the API 5CT/ISO 11960 linear weight will define the pipe wall thickness the actual linear weight of the material will be slighter greater due to the heavier density of the elements it contains versus carbon steel.

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

Reference document

Proprietary SM2242 series. TGP-0797 (latest revision)
API 5CT / ISO11960
NACE MR0175 / ISO 15156
API RP 5C1 / ISO 10405
API 5CRA / ISO 13680
VAM Book
Nippon Steel Storage and handling procedure for CRA materials

Applicable environment

Corrosive environments featuring the combined presence of CO₂ + H₂S + Chloride, in temperatures up to 149 °C, in absence of elemental Sulfur

Its primary function is Tubing and Liner, sections permanently exposed to production fluids

Final material application will depend upon CO₂, H₂S, Temperature, pH and expected Chlorides content. For a more detailed assessment please contact Nippon Steel engineers.

Manufacturing

PROCESS	DESCRIPTION
Steel making	Steel shall be made by electric furnace process followed by Vacuum Oxygen Decarburization (VOD) process &/or Argon Oxygen Decarburization (AOD) Process
Pipe making	Manufactured through Cold working the hot formed tubular product and shall be furnished in a cold worked conditions
Heat treatment	Solution Annealing Process before final cold drawing

Chemical composition

(mass %)

C	Si	Mn	Cu	Ni	Cr	Mo	Ti
≤ 0.05	≤ 0.50	≤ 1.00	1.5 ~ 3.0	38.0 ~ 46.0	19.5 ~ 24.0	2.5 ~ 4.0	Max 1.2

UNS Number: N08825

Specified mechanical properties

YIELD STRENGTH KSI		TENSILE STRENGTH KSI	ELONGATION %	HARDNESS HRC	TECHNICAL NOTE
Min	Max	Min	Min	Max
110	140	115	13	32.0	-

Physical and thermal properties

	UNIT	25°C	100°C	150°C	200°C	250°C
Density	Kg/m³	8080	8060	8040	8020	8010
Young's modulus	GPa	194	190	188	187	185
Poisson's Ratio	-	0.27	0.27	0.27	0.28	0.28
Tensile strength de-rating	%	100.0	94.6	93.4	92.0	89.8
Yield strength de-rating	%	100.0	96.1	95.0	94.4	92.8
Thermal Diffusivity	x10^-6 m²/s	2.94	3.37	3.45	3.60	3.76
Heat Capacity	x10⁶ J/m³ deg.C	3.05	3.18	3.21	3.24	3.32
Thermal Conductivity	W/m deg.C	8.96	10.7	11.1	11.7	12.5
Specific Heat	J/Kg deg.C	377	394	399	404	415
Thermal expansion	x10^-6 / deg.C	-	12.3	12.7	13.1	13.4

* Data will be shortly available.

Technical information

In wet combined CO₂ & H₂S environments, usage of SM2242 is recommendable starting from H₂S partial pressure exceeding 0.1 bar:

for lower H₂S partial pressure ranging between 0.1 to 1.0 bar, these materials should be considered depending upon the combination of critical variables such as pH, Chloride content, S⁰ and temperature.
for H₂S partial pressures exceeding 1.0 bar the only metallurgical solution to counter corrosion is to consider Austenitic Fe base or Nickel base materials.

Since H₂S is a potent pitting agent, a passivation film composed of Ni-S, Cr-O & Mo-S is required to maintain stability and protect the bulk material from corrosion attack up to a defined temperature threshold in wet combined CO₂ & H₂S environment. This is achieved through alloying of Cr-Ni & Mo.

SM2242 is a nominal 3% Molybdenum material recognized by ISO-13680 as Group 4 Category 21-42-3. This material is referenced as 4c material in NACE MR0175 /ISO 15156-3 (please refer to Fig. 1)

Fig 1: NACE MR0175 / ISO 15156-3 2003 Table A12

For this type of material, NACE MR0175 /ISO 15156-3 indicate the following application limits as general guidelines :

Fig 2: Material 4c application boundaries per NACE MR0175 / ISO 15156-3 2003 (Ref. Table A-14)

According to NACE MR0175 / ISO 15156-3 2003, final material selection for the intended service will be equipment user’s responsibility and detailed information exchange with manufacturer is highly recommendable.

Nippon Steel, in absence of elemental sulfur, recommends usage of SM2242 materials for temperature up to 149°C (300°F) higher than 132°C (270°F) limit specified by ISO 15156-3.

This difference is based on Nippon Steel’s unrivaled know-how in manufacturing austenitic stainless steel since the mid 80’s and best-in-class quality control.

For fit for purpose conditions (** in Fig 2), Nippon Steel proposes verification test under the actual field condition.

Fig 3 below represents Nippon Steel SCC limits on various Austenitic materials.

Fig. 3: Relation between testing temperature and Mo content of Nickel Alloy in
H₂S- Cl^- environment in SSRT (25% NaCl+ CH₃COOH, 0.7 MPa (100 psi) H₂S)

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

Case history from the field

A selection of critical applications of SM2242 is shown below. These Field records include SM2242 material used as Tubing or Liner or Both.