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Product Information for 304 (1.4301) Chromium - Nickel

TP 304 (1.4301) stainless steel tube is a variation of the 18% chromium – 8% nickel austenitic Stainless Steel Pipe, the most familiar and most frequently used alloy in the stainless steel family. This stainless steel tube may be considered for a wide variety of applications on good corrosion resistance, ease of fabrication, excellent formability, and high strength with low weight

General Property
Alloys 304 (S30400), 304L (S30403), and 304H (S30409) stainless steels are variations of the 18 percent chromium – 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. These alloys may be considered for a wide variety of applications where one or more of the following properties are important:

Resistance to corrosion
Prevention of product contamination
Resistance to oxidation
Ease of fabrication
Excellent formability
Beauty of appearance
Ease of cleaning
High strength with low weight
Good strength and toughness at cryogenic temperatures
Ready availability of a wide range of product forms
Each alloy represents an excellent combination of corrosion resistance and fabricability. This combination of properties is the reason for the extensive use of these alloys which represent nearly one half of the total U.S. stainless steel production. The 18-8 stainless steels, principally Alloys 304, 304L, and 304H, are available in a wide range of product forms including sheet, strip, and plate. The alloys are covered by a variety of specifications and codes relating to, or regulating, construction or use of equipment manufactured from these alloys for specific conditions. Food and beverage, sanitary, cryogenic, and pressure-containing applications are examples.

Alloy 304 is the standard alloy since AOD technology has made lower carbon levels more easily attainable and economical. Alloy 304L is used for welded products which might be exposed to conditions which could cause intergranular corrosion in service.

Alloy 304H is a modification of Alloy 304 in which the carbon content is controlled to a range of 0.04-0.10 to provide improved high temperature strength to parts exposed to temperatures above 800°F.

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304 Chemical Composition
Chemistries per ASTM A213 and ASME SA-213:
Element Percentage by Weight Maximum Unless Range is Specified
304 304L 304H
Carbon 0.08 0.030 0.04-0.10
Manganese 2.00 2.00 2.00
Phosphorus 0.045 0.045 0.045
Sulfur 0.030 0.030 0.030
Silicon 0.75 0.75 0.75
Chromium 18.00
20.00		 18.00
20.00		 18.00
20.00
Nickel 8.0
10.50		 8.0
12.00		 8.0
10.5
Nitrogen 0.10 0.10 0.10

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304 Resistance To Corrosion
Grade 317 317L
UNS Designation S31700 S31703
Carbon (C) Max. 0.08 0.035*
Manganese (Mn) Max. 2.00 2.00
Phosphorous (P) Max. 0.040 0.04
Sulphur (S) Max. 0.03 0.03
Silicon (Si) Max. 1.00 1.00
Chromium (Cr) 18.0–20.0 18.0–20.0
Nickel (Ni) 11.0–14.0 11.0–15.0
Molybdenum (Mo) 3.0–4.0 3.0–4.0
Nitrogen (N) — —
Iron (Fe) Bal. Bal.
Other Elements — —
*Maximum carbon content of 0.04% acceptable for drawn tubes

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317/317L Product Range
Alloy UNS Designation Werkstoff NR. Specifications*
317 S31700 — A269, A/SA249, A/SA312
317L S31703 1.4438 A269, A/SA249, A/SA312
*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.

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