321 high quality stainless steel pipe

321 stainless steel is an austenitic stainless steel alloy that contains titanium as a stabilizing element. This addition enhances the material's resistance to intergranular corrosion, particularly in high-temperature settings. The alloy typically consists of 17% chromium, 9% nickel, and 5% titanium, making it a robust option for environments where heat and corrosion are prevalent. The titanium content allows the steel to maintain its strength and structural integrity even when exposed to extreme temperatures, making it ideal for applications that require both durability and reliability.

product details

specification

Product Name	321 stainless steel pipe
Standard	ASTM,JIS,DIN,GB,AISI,DIN,EN
Outer diameter	Round Pipe	4mm-200mm
	Square Pipe	1010mm-100100mm
	Rectangular Pipe	1020mm-50100mm
Wall Thickness	0.6mm-6.0mm
Length range	1-6 meters, Length can be customized
Error	±1%
Certification	ISO 9001 ，CE，API
Surface treatment	Black, Bright Polished, Rough Turning, Matt Surface Treatment, No. 4. BA, etc.
Country of origin	China
Main Applications	1.Chemical industry: used to manufacture chemical reactors, pipelines, storage tanks and other equipment, and can resist corrosion from a variety of chemical media.
	2.Oil and Gas Industry: Used for oil and gas transportation pipelines, equipment and accessories, able to withstand high temperature and high pressure environments.
	3.Aerospace: In the field of aerospace, 321 stainless steel pipes are often used to manufacture aircraft structural parts and engine components due to their excellent high temperature resistance.
	4.Power industry: Boilers, heat exchangers and other equipment used in power plants, which can be used for a long time in high temperature and corrosive environment.
	5.Food and Pharmaceutical Industry: Due to its good hygienic properties, it is often used in pipes and containers of food processing and pharmaceutical equipment.
	6.Construction and decoration: In the construction industry, 321 stainless steel pipes are also used for some special decorative and structural applications.
Package	Simple packaging, reinforced packaging, wooden frame, metal frame, pallet, wrapping
Payment Term	TT, LC,Cash, Paypal, DP, DA,Western Union or Others.
After-sales service	1. Quality assurance period 2. Return and exchange policy 3. Delivery and acceptance assistance 4. Customer feedback collection

Product Display

Chemical Composition

≤ 0.08

≤ 0.75

≤ 2.0

17.0～19.0

9.0～12.0

≤ 0.03

≤ 0.045

Mechanical Properties

Tensile Strength Kb (MPa)	Yield Strength σ0.2 (MPa)	Elongation D5 (%)	Hardness
≥520	≥205	≥40	≤ 187HB;≤ 90HRB;≤ 200HV

Physical Performance

Density(g/cm³)	Modulus of Elasticity(Gpa)	Coefficient of Thermal Expansion(10-6/°C)	Coefficient of Thermal Conductivity(W/m*K)	Resistivity(ΜΩ. cm)
7.92	193	16.6	16.0	72

Production process

Raw material preparation: Select appropriate alloy elements, the main components are iron, chromium, nickel and titanium. Prepare raw materials according to standard ratios.
Smelting: The raw materials are placed in an electric arc furnace or induction furnace for melting to ensure uniform alloy composition. Deoxidation and impurity removal are carried out during the melting process to improve the purity of the molten steel.
Casting: The molten stainless steel liquid is cast into ingots or blocks, usually using a continuous casting process to improve production efficiency and material quality.
Hot rolling or cold rolling: After the ingot is heated, it is hot rolled or cold rolled to form the required tube blank. Hot rolling is usually used for the production of large diameter tubes, while cold rolling is used for small diameter tubes.
Tube forming: The tube billet is further processed by extrusion, expansion or welding to form the initial shape of the stainless steel tube.
Heat treatment: Heat treatment is performed on the formed stainless steel pipe to eliminate internal stress and improve the mechanical properties and corrosion resistance of the material. 321 stainless steel pipes are usually solution treated.
Cooling and cleaning: After heat treatment, the pipe needs to be cooled and cleaned to remove surface oxides and impurities.
Inspection and testing: Various inspections are carried out on finished products, including appearance inspection, dimensional measurement, mechanical property testing and corrosion performance testing, etc., to ensure that the products meet relevant standards and customer requirements.
Surface treatment: Surface treatment such as pickling, polishing, etc. is performed as needed to improve the surface finish and corrosion resistance of the pipe.
Packaging and Shipping: Finally, the qualified 321 stainless steel pipes are packaged and ready to be shipped to customers.