Tp309/Tp309s/Tp309h (UNS30900) Seamless Stainless Steel Pipe and Tube Austentic ASTM A312 High-Temperature Pipe

• Type: Seamless
• Technique: Cold Rolled
• Material: Stainless Steel
• Surface Treatment: Pickling and Annealing
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Transport Package: Knitting Strips, Plywood Case
• Specification: OD: 1/2"--40", WT: 10S--XXS
• Trademark: XTD
• Origin: China
• HS Code: 7304419000
• Production Capacity: 15000 Tons/Year

Product Description

Xintongda Special Steel is a professional duplex and alloy steel seamless pipes factory from China.
We are major in the steel grades of Inconel 600,625, 800, 825, 304, 304L, 316L, UNS S32205, S32750, 310S, 904L, 321, 317L, 347H, 316Ti, 309S, 314, S30815, S31254, ect. And we've got many audit certifaicates:




This is the brief introduction of 309S: 

Material Summary

TP309 Stainless Steel Tubing are austenitic chromium-nickel ss that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures. The lower nickel content of 309 tubes improves resistance to sulfur attack at high temperatures. The high chromium and nickel content of SUS 309 Pipe & tubes provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic 304.

The steel resists oxidation up to 1900°F (1038°C) under non-cyclic conditions
Because of its high chromium and low nickel content, 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The steel is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. 309 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced.

Chemical Composition

Grade	C	SI	Mn	Cr	Ni	P	S	Fe
309	≤0.2	≤00.75	≤02	22.0-24.0	12.0-15.0	≤00.045	≤00.03	Balance
TP309S	≤0.08	≤00.75	≤02	22.0-24.0	12.0-15.0	≤00.045	≤00.03	Balance
TP309H	0.04.-0.10	≤00.75	≤02	22.0-24.0	12.0-15.0	≤00.045	≤00.03	Balance

Mechanical Properties

Grade	Tensile Strength Ksi(Mpa)	Yield Strength Ksi(Mpa)	Elongation in 2" or 50 mm, %	Hardness Brinell/Vickers	Hardness Rockwell
TP309S	≥75(515)	≥30(205)	≥35	≤192HBW/200HV	≤90HRB
TP309H	≥75(515)	≥30(205)	≥35	≤192HBW/200HV	≤90HRB

Applications

• Boiler baffles
• Furnace components
• Oven linings
• Fire box sheets
• Other high temperature containers.