Yaang Stainless inventory includes stainless steel 304H (UNS S30409) in, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipes. Specialty testing can be utilized to upgrade sheet and other 304 stainless products with a .04 min carbon.
Alloy 304 is a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel with a maximum of 0.08% carbon. It is the standard “18/8 stainless” that is commonly found in pans and cooking tools. Alloy 304 is the most versatile and widely used alloy in the stainless steel family. It may be used for a wide variety of home and commercial applications and exhibits excellent corrosion resistance, has a high ease of fabrication, outstanding formability, and tremendous strength. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes. Due to its controlled carbon content of 0.04 to 0.10, Alloy 304H provides improved high temperature strength when exposed to temperatures above 800oF. Alloy 304H also has greater short term and long term creep strength than Alloy 304L at temperatures above 500oC and is more resistant to sensitization than Alloy 304L.
Alloy 304H is often used as a material of construction up to about 1500oF. Some examples of applications that Alloy 304H is commonly used for includes:
ASTM/ASME: UNS S30409
|Yield Strength 0.2%
Offset ksi (min.)
50 mm (min.)
(Rockwell B) MAX
Thermal Expansion (min/in)-°F
|Thermal Conductivity BTU/hr-ft-°F||Specific Heat BTU/lbm -°F||Modules of Elasticity (annealed)2-psi|
|at 68 °F||at 68 – 212°F||at 68 – 1600°F||at 212°F||at 932°F||at 32 – 212°F||in tension (E)|
|0.285||9.2||11.0||9.4||12.4||0.12||29 x 106|
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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.