Nonmagnetic stainless steels Amagnit - DEW-STAHL.COM · AMAGNIT 03 The nonmagnetic stainless steels Amagnit are based upon a combination of high chromium, manganese, molybdenum and

Nonmagnetic stainless steels Amagnit

02 OUR TECHNOLOGY AND EXPERTISE IN OIL AND GAS FIELD APPLICATIONS

The technology in the oil and gas explora-tion is continuously developing. Using the directional drilling, new oil and gas deposits - up to depths of 5 km and distances of 10 km away from the rig - can be tapped. This has the advantage that different deposits can be reached with only one rig.

With the help of extremely sensitive meas-urement tools near the drill bit, the current position of the drill bit can be determined.

The measuring methods of the tools can be distinguished in two methods:» MWD (Measuring While Drilling)» LWD (Logging While Drilling)

MWDs are using the magnetic field of the earth to define the three-dimensional-posi-tion of the drilling tool as well as the drilling direction, whereas LWDs determine infor-mation about the geological structure of the formation.

To explore the resources deep under the seabed, steels with excellent corrosion resistance and strength, especially for the drill string components e.g. drill collars, internals and connections, are required.The stainless steels Amagnit of Deutsche Edelstahlwerke fulfil the increasing require-ments of the oil and gas industry.

Due to their special properties, such as the high corrosion resistance against aggressive media, the high strength and the low relative magnetic permeability, these stainless steels are the best choice for components of MWDs and LWDs as well as drill collars.

Furthermore, the magnetic field of the earth remains uninfluenced by the use of Amagnit. Hereby precise measurements for determining the position of the drill bit are possible.

Our technology and expertise in oil and gas field applications

03AMAGNIT

The nonmagnetic stainless steels Amagnit are based upon a combination of high chromium, manganese, molybdenum and nitrogen content plus small amounts of nickel to ensure the stable austenitic micro-structure. A homogeneous austenitic micro-structure is the prerequisite for guarantee-ing the specific magnetic permeability of µr < 1.01. All our Amagnit grades pass through special metallurgical processes, selective temperature control throughout the whole production as well as a demand-ing hot-cold forming process.

Depending on existing stresses and application in the oil and gas exploration, Deutsche Edelstahlwerke supplies the nonmagnetic stainless steels:» Amagnit 501» Amagnit 509» Amagnit 601

For simple drill collars, heavy weights, flex collars and stabilisers with a low requirement on the strength level, according to AP 7, Amagnit 501 can be used.

For higher demands on corrosion resist-ance and strength, like the housings of the MWDs and MWD/LWDs itselves, we recom-mend the use of Amagnit 601. Due to the higher nitrogen content and work hardening Amagnit 601 offers both higher ultimate tensile strength (> 150 ksi) and corrosion resistance.

Through specific and application-oriented development Deutsche Edelstahlwerke broadened its portfolio of nonmagnetic stainless steels with Amagnit 509.

Due to a richer chemistry than Amagnit 501, Amagnit 509 performs better in more ag-gressive media. As a benefit of the modified chemical composition Amagnit 509 is able to reach the strength level of Amagnit 601.

High performance nonmagnetic steels with defined mechanical, physical and chemical properties – Amagnit

CONSTRUCTION OF DRILLING TOOLS IN THE OIL AND GAS EXPLORATION

1. Drill collars» Thick-walled pipes to put pressure on the drill bit» SAE 4145» Amagnit 501 / Amagnit 509

2. Stabilizer» Stabilizing the thinner drill string within the hole» Amagnit 501

3. Measurement and tracking housing» MWD / LWD technology (Measurements While Drilling / Logging While Drilling)» Amagnit 509 / Amagnit 601

4. Rotor / Stator» Downhole motor of the drill head (stainless or tungsten carbide coated engineering grades)

5. Drive Subs» Coupling between the drill bit and drive motor (engineering grades)

6. Drill bit

Seabed

Oil deposit

1 Drill collars

2 Stabilizer

3 Measurement and tracking housing

4 Rotor / Stator

5 Drive Subs

6 Drill bit

04

Standards and designationsAmagnit 501 is a non-standard special steel from Deutsche Edelstahlwerke GmbH.

Special PropertiesNonmagnetic alloy µr < 1.01 in combina-tion with high strength and high corrosion resistance.

Corrosion Resistance(PREN1 = 19 - 23)Amagnit 501 has a high resistance against intergranular corrosion according ASTM A 262 practice A and E and possesses a good resistance against stress corrosion cracking especially when a suitable surface treatment like shot or hammer peening is applied. The pitting corrosion resistance is suitable for standard drill collar applica-tions.

1PREN: Pitting resistance equivalent number %Cr + 3.3x %Mo + 16x %N

AMAGNIT 501

Amagnit 501

C Si Mn P S Cr Ni Mo N

Min. - 0.30 18.5 - - 13.0 0.25 0.35 0.32

Max. 0.04 0.60 22.0 0.03 0.005 15.0 0.50 0.50 0.40

CHEMICAL COMPOSITION (IN WEIGHT-%)

Customer specific limitations of standard analysis are possible after consultation with the Deutsche Edelstahlwerke GmbH.

PHYSICAL PROPERTIES

Density in kg/dm3 at » 20°C 7.8

Young’s modulus in GPa at» 20°C 195

Thermal conductivity in W/(m K) at » 20°C 14.0

Thermal expansion coefficient in 10-6 K-1

» 20°C – 100°C» 20°C – 200°C» 20°C – 300°C

16.517.618.5

Specific heat capacityin kJ/(kg K) at » 20°C 0.50

Density in Lb/in3 at» 68°F 0.282

Young’s modulusin ksi at » 68°F 28.3 x 103

Thermal conductivity in BTU in/(h ft2 °F) at » 68°F 97.16

Thermal expansion coefficient in 10-6 F-1

» 68°F - 212°F» 68°F - 392°F» 68°F - 572°F

9.179.7810.28

Specific heat capacityin BTU/(Lb °F) at » 68°F 0.119

05AMAGNIT 501

MECHANICAL PROPERTIES IN FORGED AND WORK-HARDENED CONDITION AT ROOM TEMPERATURE1

1 All specimens are

taken in accordance

to API-standard in

longitudinal direction

one inch below the

surface.

2 Rotating bending

@ 107 cycles

Ø» in mm» in in

50 - 1752 - 67/8

176 - 279.47 - 11

Hardness in HB ≥ 275 ≥ 275

Min. Rp0.2

» in MPa» in ksi

825120

770 112

Min Rm

» in MPa» in ksi

930 135

900130

Min. A2’’ in % 25 25

Min. Z in % 50 50

Min. AV» in J» in ft-lbs

160120

160120

Min. Fatigue strength2

» in MPa» in ksi

35050

35050

06



Corrosion Resistance(PREN1 = 28 - 33)Amagnit 509 has an excellent resistance against intergranular corrosion according to ASTM A 262 practice A and E and canwithstand stress corrosion cracking to a certain extent. A surface treatment also improves SCC resistance to higher limits. With regard to pitting corrosion Amagnit 509 shows excellent values. The critical pitting corrosion potential is higher than the potential of Amagnit 501 and close to the potential of Amagnit 601.


AMAGNIT 509

Amagnit 509


Min. - - 18.0 - - 17.0 2.50 0.90 0.50

Max. 0.05 0.30 20.0 0.03 0.005 19.0 3.50 1.20 0.60



PHYSICAL PROPERTIES

Density in kg/dm3 at» 20°C» 100°C» 200°C» 300°C

7.687.657.607.56

Young’s modulus in GPa at» 20°C 196.5

Thermal conductivity in W/(m K) at» 20°C» 100°C» 200°C» 300°C

12.714.215.817.0


» 20°C – 100°C» 20°C – 200°C» 20°C – 300°C

16.517.518.6

Specific heat capacityin kJ/(kg K) at» 20°C» 100°C» 200°C» 300°C

0.48 0.590.540.57

Density in Lb/in3 at» 68°F» 212°F» 392°F» 572°F

0.2770.2760.2750.273


Thermal conductivity in BTU in/(h ft2 °F) at» 68°F» 212°F» 392°F» 572°F

88.1498.55109.65117.98


» 68°F - 212°F» 68°F - 392°F» 68°F - 572°F

9.179.7210.33

Specific heat capacityin BTU/(Lb °F) at» 68°F» 212°F» 392°F» 572°F

0.1150.1410.1290.136

07AMAGNIT 509


1 All specimens are

taken in accordance

to API-standard in


one inch below the

surface.

2 Rotating bending

@ 107 cycles

Ø» in mm» in in

75 - 2163 - 81/2

217 - 25083/4 - 93/4

Hardness in HB ≥ 290 ≥ 290

Min. Rp0.2

» in MPa» in ksi

900130

830 120

Min Rm

» in MPa» in ksi

965 140

900130

Min. A2’’ in % 20 20

Min. Z in % 50 50


135100

135100


» in MPa» in ksi

445 65

445 65

08



Corrosion Resistance(PREN1 = 29.5 - 35)Amagnit 601 has an excellent resistance against stress corrosion cracking as far as tensile stresses are lower than 0.5 x yield strength. The pitting corrosion potential is far better than the potential of Amagnit 501. Although the PREN values of Amagnit 509 and 601 are in the same approximate range, Amagnit 601 is performing better with regard to pitting corrosion due to higher molybdenum content.


AMAGNIT 601

Amagnit 601


Min. 18.0 15.5 4.20 2.00 0.40

Max. 0.05 0.30 20.0 0.03 0.005 17.5 5.00 2.80 0.50



PHYSICAL PROPERTIES

Density in kg/dm3 at» 20°C 7.79

Young’s modulus in GPa at» 20°C 196.5

Thermal conductivity in W/(m K) at» 20°C» 100°C» 200°C» 300°C

12.814.616.317.3


» 20°C – 100°C» 20°C – 200°C» 20°C – 300°C

14.616.317.3

Specific heat capacityin kJ/(kg K) at» 20°C» 100°C» 200°C» 300°C

0.47 0.510.530.55

Density in Lb/in3 at» 68°F 0.281


Thermal conductivity in BTU in/(h ft2 °F) at» 68°F» 212°F» 392°F» 572°F

88.83101.32113.12120.06


» 68°F - 212°F» 68°F - 392°F» 68°F - 572°F

8.119.069.61

Specific heat capacityin BTU/(Lb °F) at» 68°F» 212°F» 392°F» 572°F

0.1120.1220.1270.131

09AMAGNIT 601


1 All specimens are

taken in accordance

to API-standard in


one inch below the

surface.

2 Rotating bending

@ 107 cycles

Ø» in mm» in in

75 - 2353 - 91/4

> 235 - 250> 91/4 - 93/4

Hardness in HB 300 - 400 300 - 400

Min. Rp0.2

» in MPa» in ksi

965140

900 130

Min Rm

» in MPa» in ksi

1035150

1035150

Min. A2’’ in % 20 20

Min. Z in % 50 50


135100

135100


» in MPa» in ksi

44565

44565

10 CURRENT DENSITY – POTENTIAL CURVE OF AMAGNIT ALLOYScu

rren

t d

ensi

ty i

log

[mA

/cm

2 ]

102

101

100

10-1

10-2

10-3

10-4

10-5

10-6

potential U [mVH]

-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100

solution: 800 ppm CI-

temperature: 23°Cvelocity: 0,1 mV/s

Amagnit 501 Amagnit 509 Amagnit 601

CURRENT DENSITY – POTENTIAL CURVE OF AMAGNIT ALLOYS

11DELIVERY FORMS AND DIMENSIONS

General note (liability)All statements regarding the properties or utilization of the materials or products mentioned are for the purpose of description only. Guarantees regarding the existence of certain pro-perties or certain utilization are only ever valid if agreed upon in writing.

Amagnit Form of delivery Diameter in mm Diameter in in

501Forged bars, work-hardened, peeled / machined, solid or bored with common API IDs

50 - 250 2 - 93/4

509Forged bars, work-hardened, peeled / machined, solid or bored with common API IDs 75 - 250

3 - 93/4

601Forged bars work-hardened, peeled / machined, solid or bored with common API IDs 75 - 250

3 - 93/4

Delivery forms and dimensionsTypically Amagnit is used in the work-hard-ened condition. Through a controlled forging process on a rotary hammer forging machine a uniform strain distribution over the entire circumference is achieved. Due to a rapid quenching after the pre-forging process the Amagnit steels are practically free of undesirably precipitations. This has an extremely positive effect on different types of corrosion.

Delivery Program You can find our complete delivery program in the brochure „High-tech Steel Solutions for tomorrow’s World (Products and Services)“ on www.dew-stahl.com.

DELIVERY FORMS AND DIMENSIONS

2016-0058

Deutsche Edelstahlwerke GmbH

Auestr. 458452 WittenGermany

Phone: +49 (0)2302 29 - 0Fax: +49 (0)2302 29 - 4000

[email protected]

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Nonmagnetic stainless steels Amagnit - DEW-STAHL.COM · AMAGNIT 03 The nonmagnetic stainless steels Amagnit are based upon a combination of high chromium, manganese, molybdenum and