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ASTM A511/A511M Standard Specification for Mechanical

ASTM A511/A511M specification covers seamless stainless tubing for use in mechanical applications where corrosion-resistant or high-temperature strength is needed.

ASTM A511 Seamless Stainless Steel Tubing

If you require details of ASTM A511-04, refer here ASTM A511-04...
Keywords:
austenitic stainless steel
mechanical tubing
seamless steel tube
stainless steel pipe
steel tube
Abstract
This specification covers seamless stainless steel 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 strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The tubes shall be made by a seamless process and by either cold working or hot working as specified. Seamless stainless steel tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel and then cold finishing the hot-worked tubing to produce the desired shape, dimensions and properties All austenitic tubes shall be furnished in the annealed condition. An analysis of each heat of steel shall be made to determine the percentages of the elements specified. If secondary melting processes are employed, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope:
1.1 This specification covers seamless stainless steel tube for use in mechanical applications where corrosion-resistant or high-temperature strength is needed. The grades covered are listed in Table 1 and Table 2.
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.
2. Referenced Documents
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E59 Practice for Sampling Steel and Iron for Determination of Chemical Composition
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products Preparation for Shipment and Storage
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
Index Terms:
austenitic stainless steel; mechanical tubing; seamless steel tube; stainless steel pipe; steel tube; Corrosive service applications--tube (steel);
High-temperature service applications--steel tube; Mechanical tubing--specifications; Seamless steel tube--specifications; Stainless steel pipe--specifications; ICS Number Code 23.040.10; 23.040.40; ICS Number Code 23.040.10; 23.040.40
For More Details,Please refer to: ASTM A511/511M

TABLE 1 Chemical Requirements of Austenitic Stainless Steels

Grade
Composition, %
Carbon
Manga-
nese, max
Phos-
pho-
rus,
max
Sul-
fur,
max
Silicon, max
Nickel
Chromium
Molybdenum
Titanium
Columbium plus Tantalum
Selenium
MT 302 0.08 to 0.20 2.00 0.040 0.030 1.00 8.0–10.0 17.0–19.0 ... ... ... ...
MT 303 0.15 max 2.00 0.20 0.15 min 1.00 8.0–10.0 17.0–19.0 ... ... ... ...
MT 303Se 0.15 max 2.00 0.040 0.040 1.00 8.0–11.0 17.0–19.0 ... ... ... 0.12–0.2
MT 304 0.08 max 2.00 0.040 0.030 1.00 8.0–11.0 18.0–20.0 ... ... ... ...
MT 304L 0.035 maxA 2.00 0.040 0.030 1.00 8.0–13.0 18.0–20.0 ... ... ... ...
MT 305 0.12 2.00 0.040 0.030 1.00 10.0–13.0 17.0–19.0 ... ... ... ...
MT 309S 0.08 max 2.00 0.040 0.030 1.00 12.0–15.0 22.0–24.0 ... ... ... ...
MT 310S 0.08 max 2.00 0.040 0.030 1.00 19.0–22.0 24.0–26.0 ... ... ... ...
MT 316 0.08 max 2.00 0.040 0.030 1.00 11.0–14.0 16.0–18.0 2.0–3.0 ... ... ...
MT 316L 0.035 maxA 2.00 0.040 0.030 1.00 10.0–15.0 16.0–18.0 2.0–3.0 ... ... ...
MT 317 0.08 max 2.00 0.040 0.030 1.00 11.0–14.0 18.0–20.0 3.0–4.0 ... ... ...
MT 321 0.08 max 2.00 0.040 0.030 1.00 9.0–13.0 17.0–20.0 ... B ... ...
MT 347 0.08 max 2.00 0.040 0.030 1.00 9.0–13.0 17.0–20.0 ... ... 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

Grade
Composition, %
Carbon, max
Manga-
nese,
max
Phos-
phorus,
max
Sulfur,
max
Silicon, max
Nickel
Chromium
Molyb-
denum
Aluminum
Copper
Nitrogen
Selenium
Martensitic
MT 403 0.15 1.00 0.040 0.030 0.50 0.50 max 11.5–13.0 0.60 max
MT 410 0.15 1.00 0.040 0.030 1.00 0.50 max 11.5–13.5 ... ... ... ... ...
MT 414 0.15 1.00 0.040 0.030 1.00 1.25–2.50 11.5–13.5 ... ... ... ... ...
MT 416Se 0.15 1.25 0.060 0.060 1.00 0.50 max 12.0–14.0 ... ... ... ... 0.12–0.20
MT 431 0.20 1.00 0.040 0.030 1.00 1.25–2.50 15.0–17.0 ... ... ... ... ...
MT 440A 0.60 to 0.75 1.00 0.040 0.030 1.00 ... 16.0–18.0 0.75 max ... ... ... ...
Ferritic
MT 405 0.08 1.00 0.040 0.030 1.00 0.50 max 11.5–14.5 ... 0.10–0.30 ... ... ...
MT 429 0.12 1.00 0.040 0.030 1.00 0.50 max 14.0–16.0 ... ... ... ... ...
MT 430 0.12 1.00 0.040 0.030 1.00 0.50 max 16.0–18.0 ... ... ... ... ...
MT 443 0.20 1.00 0.040 0.030 1.00 0.50 max 18.0–23.0 ... ... 0.90–1.25 ... ...
MT 446–1 0.20 1.50 0.040 0.030 1.00 0.50 max 23.0–30.0 ... ... ... 0.25 max ...
MT 446–2A 0.12 1.50 0.040 0.030 1.00 0.50 max 23.0–30.0 ... ... ... 0.25 max ...
29-4 0.010 0.30 0.025 0.020 0.20 0.15 max 28.0–30.0 3.5–4.2 ... 0.15 max 0.020 max ...
29-4-2 0.010 0.30 0.025 0.020 0.20 2.0–2.5 28.0–30.0 3.5–4.2 ... 0.15 max 0.020 maxB ...

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 %.

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