ASTM A 511/A511M : 2012
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Standard Specification for Seamless Stainless Steel Mechanical Tubing
Hardcopy , PDF
11-11-2014
English
01-03-2012
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
| 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 %.
TABLE 3 Chemical Requirements of Austenitic-Ferritic Stainless SteelsA
| Grade | Composition, % | ||||||||||
| Carbon | Manganese, max | Phosphorus, max | Sulfur, max | Silicon, max | Nickel | Chromium | Molybdenum | Nitrogen | Copper | Others | |
| S31260 | 0.030 | 1.00 | 0.030 | 0.030 | 0.75 | 5.5–7.5 | 24.0–26.0 | 2.5–3.5 | 0.10–0.30 | 0.20–0.80 | W 0.10–0.50 |
| S31803 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | ... | ... |
| S32101 | 0.040 | 4.0–6.0 | 0.040 | 0.030 | 1.00 | 1.35–1.70 | 21.0–22.0 | 0.10–0.80 | 0.20–0.25 | 0.10–0.80 | ... |
| S32205 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | ... | … |
| S32304 | 0.030 | 2.50 | 0.040 | 0.040 | 1.00 | 3.0–5.5 | 21.5–24.5 | 0.05–0.60 | 0.05–0.20 | 0.05–0.60 | ... |
| S32506 | 0.030 | 1.00 | 0.040 | 0.015 | 0.90 | 5.5–7.2 | 24.0–26.0 | 3.0–3.5 | 0.08–0.20 | ... | W 0.05–0.30 |
| S32550 | 0.040 | 1.50 | 0.040 | 0.030 | 1.00 | 4.5–6.5 | 24.0–27.0 | 2.9–3.9... | 0.10–0.25 | 1.50–2.50 | ... |
| S32707 | 0.030 | 1.50 | 0.035 | 0.010 | 0.50 | 5.5–9.5 | 26.0–29.0 | 4.0–5.0 | 0.30–0.50 | 1.0 | Co 0.5–2.0 |
| S32750 | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 6.0–8.0 | 24.0–26.0 | 3.0–5.0 | 0.24–0.32 | 0.50 | ... |
| S32760B | 0.05 | 1.00 | 0.030 | 0.010 | 1.00 | 6.0–8.0 | 24.0–26.0 | 3.0–4.0 | 0.20–0.30 | 0.50–1.00 | W 0.50–1.00 |
| S32906 | 0.030 | 0.80-1.50 | 0.030 | 0.030 | 0.80 | 5.8–7.5 | 28.0–30.0 | 1.50–2.60 | 0.30–0.40 | 0.80 | ... |
| S32808 | 0.030 | 1.10 | 0.030 | 0.010 | 0.50 | 7.0–8.2 | 27.0–27.9 | 0.80–1.20 | 0.30–0.40 | … | W 2.10–2.50 |
| S32950 | 0.030 | 2.00 | 0.035 | 0.010 | 0.60 | 3.5–5.2 | 26.0–29.0 | 1.00–2.50 | 0.15–0.35 | ... | ... |
| S39274 | 0.030 | 1.00 | 0.030 | 0.020 | 0.80 | 6.0–8.0 | 24.0–26.0 | 2.5–3.5 | 0.24–0.32 | 0.20–0.80 | W 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.
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