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UNGÜLTIG ASTM A268/A268M-20 1.3.2020 Ansicht

Ergänzende Informationen

ASTM A268/A268M-20

Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

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NORM herausgegeben am 1.3.2020

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Informationen über die Norm:

Bezeichnung normen: ASTM A268/A268M-20
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.3.2020
SKU: NS-988542
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM

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Kategorie - ähnliche Normen:

Iron and steel pipes

Die Annotation des Normtextes ASTM A268/A268M-20 :

Keywords:

ferritic stainless steel, seamless steel tube, stainless steel tube, steel tube, welded steel tube,, ICS Number Code 23.040.10 (Iron and steel pipes)

Ergänzende Informationen

1. Scope

1.1 This specification2 covers a number of grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic. Two of these grades, TP410 and UNS S 41500 (Table 1), are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys are sensitive to notch-brittleness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials.

TABLE 1

Grade

TP439

. . .

TP430 Ti

TP
XM-27

TP
XM-33^A

18Cr-2Mo

29-4

29-4-2

26-3-3

25-4-4

...

. . .

TP468

UNS
Designation

S43035

S43932

S41500^B

S43036

S44627

S44626

S44400

S44700

S44800

S44660

S44635

S44735

S32803

S40977

S43940

S42035

S46800

Element

Composition, %

C, max

0.07

0.030

0.05

0.10

0.01^A

0.06

0.025

0.010

0.030

0.025

0.030

0.015^C

0.03

0.08

0.030

Mn, max

1.00

0.5–1.0

1.00

0.40

0.75

1.00

0.30

1.00

0.5

1.50

1.00

P, max

0.040

0.03

0.040

0.02

0.040

0.025

0.040

0.020

0.040

0.045

0.040

S, max

0.030

0.03

0.030

0.02

0.020

0.030

0.020

0.030

0.005

0.015

0.030

Si, max

1.00

0.60

1.00

0.40

0.75

1.00

0.20

1.00

0.75

1.00

0.50

1.00

0.50 max

0.50

3.5–5.5

0.75 max

0.5^D max

0.50 max

1.00 max

0.15 max

2.0–2.5

1.0–3.50

3.5–4.5

1.00 max

3.0–4.0

0.30–1.00

. . .

1.0–2.5

0.50

17.00–

17.0–19.0

11.5–14.0

16.00–

25.0–27.5

25.0–27.0

17.5–19.5

28.0–30.0

25.0–28.0

24.5–26.0

28.00–

28.0–
29.0

10.50–
12.50

17.50–
18.50

13.5–
15.5

18.00–
20.00

19.00

19.50

30.00

...

0.5–1.0

...

0.75–1.50

1.75–2.50

3.5–4.2

3.0–4.0

3.5–4.5

3.60–4.20

1.8–2.5

. . .

0.2–1.2

. . .

Al, max

0.15

. . .

...

. . .

Cu, max

...

. . .

...

0.2

0.20

...

0.15

...

. . .

N, max

0.04

0.030 (Ti + Cb) {0.20 + 4 (C + N)} min.; 0.75 max

. . .

...

0.015

0.040

0.035

0.020^E

0.040

0.035

0.045

0.020

0.030

. . .

0.030

0.20 + 4 (C

. . .

5 × C min;

...

7 × (C + N)

(Ti + Cb)

...

(Ti + Cb) =

. . .

0.10–0.60

0.30–0.50

0.07–0.30

+ N) min;

0.75 max

but no less

0.20 + 4

0.20–1.00

0.20 + 4

0.20–1.00

1.10 max

than 0.20

(C + N)

and 6 ×

(C + N)

and 6 ×

min; 1.00

min; 0.80

(C + N)

min to

(C+ N)

max

min

0.80 max

min

...

. . .

...

0.05–0.20

...

0.15–
0.50^F

. . .

(3 × %C + 0.30) min

. . .

0.10–0.60

(Ti + Cb) =

0.20 +4(C+N)

min;0.80 max

1.2 An optional supplementary requirement is provided, and when desired, shall be so stated in the order.

1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

E213-22	Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing
A1016/A1016M-23	Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
A763-15(2021)	Standard Practices for Detecting Susceptibility to Intergranular Attack in Ferritic Stainless Steels
A480/A480M-23b	Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip (Includes all amendments and changes 11/7/2023).
E273-20	Standard Practice for Ultrasonic Testing of the Weld Zone of Welded Pipe and Tubing

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