SUS 321 Stainless Steel Pipe Price Per Kg

If you are looking for SUS 321 stainless steel pipe price per kg with stable quality and fast delivery, GNEE provides a complete solution for high-temperature and corrosion-resistant piping applications.SUS 321 is a titanium-stabilized austenitic stainless steel, specially designed to resist intergranular corrosion after welding and during long-term service at elevated temperatures. With 18+ years of export experience, GNEE supplies certified SUS 321 stainless steel pipes to customers in chemical processing, power generation, oil & gas, and heat exchanger industries worldwide.

 

In 2025, the price of SUS 321 stainless steel pipes is currently between US$3.00 and US$5.50 per kilogram, with the exact price varying depending on size, wall thickness, surface finish, and order quantity. Due to the insufficient performance of 304 stainless steel at high temperatures, the demand for 321 stainless steel continues to grow, resulting in its price being 20%-40% higher than that of 304 stainless steel. Price fluctuations are closely related to the cost of titanium and nickel.

 

SUS 321 Stainless Steel Pipe Specifications

Item	Details
Material Grade	SUS 321 / SUS 321H
Equivalent Grades	ASTM TP321 / TP321H, EN 1.4541
Standard	ASTM A312, A213, A269, JIS G3459
Pipe Type	Seamless / Welded
Outer Diameter (OD)	6 mm – 610 mm
Wall Thickness	0.8 mm – 30 mm
Length	6 m, 12 m, or customized
Surface Finish	Pickled, Bright Annealed (BA)
Inspection	Eddy current, UT, Hydro test
Certification	EN 10204 3.1, ISO, SGS, BV

 

Composition ranges for 321-grade stainless steel

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	– 0.08	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 12.0	0.10	Ti=5(C+N) 0.70
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 12.0	–	Ti=4(C+N) 0.70

 

Mechanical properties of 321-grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50 mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217

 

Possible alternative grades to 321-grade stainless steel

Grade	Why it might be chosen instead of 321
304L	The requirement is for resistance to intergranular corrosion, not for high-temperature strength
3CR12	Only a mild "high temperature" environment is present… up to about 600 °C.
304H	Only a mild "high temperature" environment is present… up to about 800 °C.

 

What is the temperature range for SS 321 material?
321 stainless steel exhibits good oxidation resistance up to 900°C under intermittent use conditions and up to 925°C under continuous use conditions. This grade of material performs well in the temperature range of 425-900°C, and is particularly suitable for applications where subsequent exposure to aqueous environments is expected.

 

GNEE currently has SUS 321 (UNS S32100) products in stock, including: plates, sheets, coils, strips, tubes, bars, and wires. In addition, we offer a variety of surface finishes for you to choose from, such as: No.1, 2B, 2D, BA, No.3, No.4, HL, No.8, sandblasting, etc.
We guarantee 100% quality. We will never deliver any defective products to our customers. Please contact us to customize your required product specifications, including shape, condition, surface treatment, and processing technology.