Austenitic steel ASME SA312 · TP321

Short Description:

stainless steel grade ASTM A312 Tp321 is a titanium stabilized alloy. The SS 321 Welded Pipe produced under specification ASTM A312 has been designed to resist intergranular corrosion, especially in high temperature settings. At a temperature between 800 to 1500°F, the more conventionally used austenitic stainless steel grades are susceptible to chromium carbide precipitation, unlike the ASTM A312 Gr.Tp321 which has higher creep strength as well as stress rupture properties. In addition, the 321 Stainless Steel Pipe has good toughness properties even at lower temperatures.

Tube Grade: TP321, AISI 321, EN 1.4541, UNS S32100

Tube Type: Seamless

Tube Form: Straight, U Bend, Cut-to-Length Pieces

Surface Finish: Solution Annealed & Pickled (AP), Bright Annealed (BA), Polished

Standards (ASME/ASTM): ASME SA312, ASTM A312

Standards (EN): EN 10216-5

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Product Detail

Product Tags

TP321 Stainless Steel Tubes, 1.4541 Stainless Steel Tube

Item	Specification / Details
Stainless Steel Pipe	ASME SA312, ASTM A312
Pipe Size (NPS)	1/8″ NB to 30″ NB (DN6 to DN750)
Wall Thickness / Schedule	SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS
Type	Seamless, Welded (WLD), Heavy Wall Welded (EFW) (
Form	Round Pipe
Length	Single Random Length (SRL), Double Random Length (DRL), Cut Length
End	Plain End (PE), Beveled End (BE), Threaded End
End Protection	Plastic Caps
Outside Finish	AP (Annealed & Pickled), BA (Bright Annealed), Polished
Delivery Condition	Solution Annealed and Pickled
Inspection, Test Reports	Mill Test Certificates, EN 10204 3.1, Hydrostatic Test, Eddy Current Test, Radiographic Test (for Welded)
Packing	Packed in Wooden Boxes, Steel Strip Bundles, or as per Customers Requests
Specials	Custom wall thickness, non-standard diameters, and specialized testing available upon request

TP 321 . UNS S32100 . 1.4541 Chemical Composition

Chemical Composition (in % by mass)

Grade	C (Max.)	Si (Max.)	Mn (Max.)	P (Max.)	S (Max.)	Cr	Ni	Mo	Ti	N (Max.)	Others
321	0.08	0.75	2.00	0.045	0.030	17.0 – 19.0	9.0 – 12.0	-	5x(C+N) – 0.70	0.10	-
1.4541	0.08	1.00	2.00	0.045	0.015	17.0 – 19.0	9.0 – 12.0	-	5xC – 0.70	-	-

TP 321 . UNS S32100 . 1.4541 Mechanical Property

Mechanical Property & Heat Treatment

Grade	Rp 0.2 Mpa (Min.)	Rp 1.0 Mpa (Min.)	Rm Mpa (Min. – Max.)	A (%) (Min.)	Hardness (HRB) (Max.)	Heat Treatment
321	205	-	515	35	90	Solution Annealed
1.4541	190	220	500 – 730	30	-	Solution Annealed