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ASTM International - ASTM A511/A511M-12

Standard Specification for Seamless Stainless Steel Mechanical Tubing

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Organization: ASTM International
Publication Date: 1 March 2012
Status: inactive
Page Count: 11
ICS Code (Iron and steel pipes): 23.040.10
ICS Code (Metal fittings): 23.040.40
scope:

1.1 This specification covers seamless stainless tubing for use in mechanical applications where corrosion-resistant or high-temperature strength is needed. The grades covered are listed in Table 1, Table 2, and Table 3.

1.2 This specification covers seamless cold-finished mechanical tubing and seamless hot-finished mechanical tubing in sizes up to 12¾ in. [325 mm] in outside nominal diameter (for round tubing) with wall thicknesses as required.

1.3 Tubes shall be furnished in one of the following shapes, as specified by the purchaser: round, square, rectangular, or special.

1.4 Optional supplementary requirements are provided and when desired, shall be stated in the order.

1.5 The values stated in inch-pound units are to be regarded as the standard. Within the text, the SI units are shown in square brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

TABLE 1 Chemical Requirements of Austenitic Stainless Steels

GradeComposition, %
Carbon Manga-
nese, max
Phos-
pho-
rus,
max
Sul-
fur,
max
Silicon, max NickelChromiumMolybdenumTitaniumColumbium plus Tantalum Selenium
MT 3020.08 to 0.20 2.000.0400.0301.00 8.0-10.017.0-19.0 ............
MT 3030.15 max 2.000.200.15 min1.00 8.0-10.017.0-19.0 ............
MT 303Se0.15 max 2.000.0400.0401.00 8.0-11.017.0-19.0 .........0.12-0.2
MT 3040.08 max2.000.0400.0301.00 8.0-11.018.0-20.0 ............
MT 304L0.035 max

A

2.000.040 0.0301.00 8.0-13.018.0-20.0 ............
MT 3050.122.000.0400.0301.0010.0-13.017.0-19.0......... ...
MT 309S0.08 max2.000.0400.0301.0012.0-15.022.0-24.0......... ...
MT 310S0.08 max2.000.0400.0301.0019.0-22.024.0-26.0......... ...
MT 3160.08 max 2.000.0400.0301.0011.0-14.016.0-18.0 2.0-3.0... ......
MT 316L0.035 max

A

2.000.0400.0301.00 10.0-15.016.0-18.02.0-3.0.........
MT 3170.08 max 2.000.0400.0301.0011.0-14.018.0-20.0 3.0-4.0... ......
MT 3210.08 max 2.000.0400.0301.00 9.0-13.017.0-20.0 ...

B

......
MT 3470.08 max 2.000.0400.0301.00 9.0-13.017.0-20.0 ......

C

...

A For small diameter or thin wall tubing or both, where many drawing passes are required, a maximum of 0.040 % carbon is necessary in grades MT-304L and MT-316L. Small outside diameter tubes are defined as those under a 0.500 in. [12.7 mm] outside diameter and light-wall tubes as those under a 0.049 in. [1.2 mm] average wall thickness (0.044 in. [1.1 mm] min wall thickness).

B The titanium content shall be not less than five times the carbon content and not more than 0.60 %.

C The columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.00 %.

TABLE 2 Chemical Requirements of Ferritic and Martensitic Stainless Steels

GradeComposition, %
Carbon, max Manga-
nese,
max
Phos-
phorus,
max
Sulfur,
max
Silicon, maxNickelChromiumMolyb-
denum
Aluminum CopperNitrogenSelenium
Martensitic
MT 4030.151.000.0400.0300.500.50 max 11.5-13.00.60 max
MT 4100.151.000.0400.0301.000.50 max 11.5-13.5...............
MT 4140.151.000.0400.0301.001.25-2.5011.5-13.5...... .........
MT 416Se0.151.25 0.0600.0601.000.50 max12.0-14.0...... ......0.12-0.20
MT 4310.201.000.0400.0301.001.25-2.5015.0-17.0...... .........
MT 440A0.60 to 0.751.000.0400.0301.00...16.0-18.00.75 max... .........
Ferritic
MT 4050.081.000.0400.0301.000.50 max11.5-14.5...0.10-0.30.........
MT 4290.121.000.0400.0301.000.50 max14.0-16.0...............
MT 4300.121.000.0400.0301.000.50 max16.0-18.0...............
MT 4430.201.000.0400.0301.000.50 max18.0-23.0......0.90-1.25......
MT 446-10.201.500.0400.0301.00 0.50 max23.0-30.0.........0.25 max...
MT 446-2

A

0.121.500.0400.030 1.000.50 max23.0-30.0.........0.25 max ...
29-40.0100.300.0250.0200.200.15 max28.0-30.03.5-4.2 ...0.15 max0.020 max...
29-4-20.0100.300.0250.0200.202.0-2.528.0-30.03.5-4.2 ...0.15 max0.020 max

B

...

A MT446-2 is a lower carbon version of MT446-1, that has a lower tensile strength but improved ductility and toughness.

B Carbon plus nitrogen = 0.025 max %.

TABLE 3 Chemical Requirements of Austenitic-Ferritic Stainless SteelsA

GradeComposition, %
CarbonManganese, maxPhosphorus, maxSulfur, maxSilicon, maxNickelChromiumMolybdenumNitrogenCopperOthers
S312600.0301.000.0300.0300.755.5-7.524.0-26.02.5-3.50.10-0.300.20-0.80W 0.10-0.50
S318030.030 2.000.0300.0201.004.5-6.521.0-23.02.5-3.50.08-0.20......
S321010.0404.0-6.00.0400.0301.001.35-1.7021.0-22.00.10-0.800.20-0.250.10-0.80...
S322050.0302.000.0300.0201.004.5-6.522.0-23.03.0-3.50.14-0.20...
S323040.0302.500.0400.0401.003.0-5.521.5-24.50.05-0.600.05-0.200.05-0.60...
S325060.0301.000.0400.0150.905.5-7.224.0-26.03.0-3.50.08-0.20...W 0.05-0.30
S325500.0401.500.0400.0301.004.5-6.524.0-27.02.9-3.9...0.10-0.251.50-2.50...
S327070.0301.500.0350.0100.505.5-9.526.0-29.04.0-5.00.30-0.501.0Co 0.5-2.0
S327500.0301.200.0350.0200.806.0-8.024.0-26.03.0-5.00.24-0.320.50...
S32760

B

0.051.000.0300.0101.006.0-8.024.0-26.03.0-4.00.20-0.300.50-1.00W 0.50-1.00
S329060.0300.80-1.500.0300.0300.805.8-7.528.0-30.01.50-2.600.30-0.400.80...
S328080.0301.100.0300.0100.507.0-8.227.0-27.90.80-1.200.30-0.40W 2.10-2.50
S329500.0302.000.0350.0100.603.5-5.226.0-29.01.00-2.500.15-0.35......
S392740.0301.000.0300.0200.806.0-8.024.0-26.02.5-3.50.24-0.320.20-0.80W 1.50-2.50

A Maximum, unless a range or minimum is indicated. Where ellipses (…) appear in this table, there is no requirement and analysis for the element need not be determined or reported.

B % Cr + 3.3 X % Mo + 16X % N ≥ 40.

abstract:

This specification covers seamless stainless tubing for use in mechanical applications where corrosion-resistant or high-temperature strength is needed. The steel may be cast in ingots or may be... View More

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