Stainles Steel 304/304H Seamless Pipe

Stainless Steel 304: It contains around 18% chromium and 8% nickel, making it one of the most widely used stainless steel grades. It also contains a small amount of carbon, typically around 0.08%.

standard:ASTM

shape:Round/Rectangle

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introduction

304H is an austenitic alloy mainly composed of chromium, nickel and carbon. This alloy has excellent corrosion resistance and high temperature properties, with a minimum yield strength of 205 MPa, which means it retains its shape and structure even when subjected to high stresses. The minimum tensile strength is 515 MPa, which means it has a strong ability to resist tensile deformation. It can easily expand up to 40% as needed, which makes it highly flexible when it comes to withstanding stress and deformation. It has good high temperature resistance and can withstand high temperatures from 500°C to 800°C.
According to ASTM A312 TP standard, 304H seamless pipe shows a high degree of corrosion resistance in various corrosive environments. These tubes are made of titanium and are very strong and durable. ASME SA 312 304H steel pipe is manufactured by longitudinal welding with or without weld seams. The tubes are available in outer diameters ranging from 6.35 mm to 114.3 mm, thicknesses ranging from 0.8 mm to 12.7 mm, and lengths up to 26 meters.
304H stainless steel pipe is an extremely strong, flexible and corrosion-resistant pipe suitable for a variety of applications that need to withstand high temperatures and corrosive environments.

Technical Data

Chemical Composition

	C	MN	SI	P	S	CR	NI	N
304	0.07max	2.0max	0.75max	0.045max	0.03max	min: 18.0 max: 20.0	min: 8.0 max: 10.5	—
304H	min: 18.0 max:20.0	min: 8.0 max: 10.5	min: 0.04 max:0.10	0.75 max	2.0 max	0.045 max	0.03 max	0.10 max

Mechanical Properties

Grade	Tensile Strength ksi (min)	Yield Strength 0.2% ksi (min)	Elongation %	Hardness (Brinell) MAX	Hardness (Rockwell B) MAX
304	75	30	40	201	92
304H	75	30	40	201	92

Physical Properties

SS 304
Density lbm/in3	Thermal Conductivity (BTU/h ft. °F)	Electrical Resistivity (in x 10-6)	Modulus of Elasticity (psi x 106	Coefficient of Thermal Expansion (in/in)/ °F x 10-6	Specific Heat (BTU/lb/ °F)	Melting Range (°F)
at 68°F: 0.285	9.4 at 212°F	28.3 at 68°F	28	9.4 at 32 – 212°F	0.1200 at 68°F to 212°F	2500 to 2590
	12.4 at 932 °F	39.4 at 752°F		10.2 at 32 – 1000°F
		49.6 at 1652 °F		10.4 at 32 – 1500°F
SS 304H
Denstiy lbm/in3	Coefficient of 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

company advantage

GNEE's steel pipe product applications cover oil, natural gas, shipbuilding, chemical industry, environmental protection, boilersManufacturing, water conservancy, electric power, steel structure products, construction, etc. GNEE company implements API SPEC 5CT, API SPEC5L, CB/T9711.1, GB/T9711.2, GB/T13793, SY/T5768 and other international and domestic standards, which can meet different Standard customer needs. Our products are sold overseas. So far, the main markets are in the Middle East, Africa, Southeast Asia and Oceania.