ASTM A908-2019 pdf free download

ASTM A908-2019 pdf free download.Standard Specification for Stainless Steel Needle Tubing
1. Scope
1.1 This specification covers austenitic, stainless steel, needle tubing in hard-drawn tempers for industrial applica- tions. 1.2 In general, needle tubing describes small-diameter tub- ing with outside diameters (ODs) in the range of0.008 to 0.203 in. (0.2 to 5.2 mm) with nominal wall thicknesses in the range of0.002 to 0.015 in. (0.05 to 0.4 mm). Needle tubing gages are normally 6 through 33. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information
3.1 Orders for material in accordance with this specification should include the following, as required, to describe the material adequately: 3.1.1 Quantity (feet, metres, or number of lengths), 3.1.2 Gauge or size (outside diameter and minimum wall thickness), 3.1.3 Length (specific or random), and 3.1.4 Test report required (see the section on certification in Specification A1016/A1016M).
4. Process
4.1 An electric furnace or other similar primary melting process with or without degassing or refining may be used.
5. General Requirements
5.1 Material furnished in accordance with this specification shall conform to the applicable requirements of the current edition of Specification A1016/A1016M, unless otherwise provided herein.
6. Manufacture
6.1 Needle tubing shall be made by the seamless or welded and drawn process and shall be furnished in the hard-drawn temper condition.
7. Heat Treatment
7.1 Unless otherwise specified by the purchaser, no heat treatment is required.
8. Chemical Composition
8.1 Stainless steel, Type 304, UNS S30400, in accordance with Table 1 shall be used. 8.2 HeatAnalysis—An analysis ofeach heat ofsteel shall be made by the manufacturer from samples made during the pour. The chemical composition thus determined shall meet the requirements of Table 1. 8.3 Product Analysis—An analysis may be made by the purchaser from finished tubing. The chemical composition thus determined shall meet the requirements of Table 1.
9. Mechanical Properties
9.1 Tensile Requirements—The tubing shall meet the tensile properties specified in Table 2. Yield strength, elongation, and hardness tests are not required for needle tubing.