ASTM A312 TP321H Stainless Steel Seamless Pipes

321H vs 321 / 347H

Choose	When	Watch-outs
321H	Ti-stabilised + higher carbon for heat service	Stabilization / heat treatment matter
321	Stabilised general / weld service	Lower carbon than H
347H	Nb-stabilised high-temp twin	Confirm which stabilizer the PO names

Copy-paste RFQ

ASTM A312 / ASME SA312 TP321H seamless pipe NPS/OD: ____ Sch/wall: ____ Length: ____ Qty: ____ Ends: PE/BE MTC: 3.1/3.2 Extras: ____ Destination: ____

Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.

ASTM A312 TP321H Stainless Steel Seamless Pipe

ASME SA312 · UNS S32109 · Ti-stabilised 321 with H-grade carbon

Savoy Piping Inc. supplies ASTM A312 TP321H seamless pipe — H-grade titanium-stabilised austenitic for elevated-temperature strength plus stabilisation.

Grade hub · A312 Seamless · A312 Welded · A213 · A269 · A358 EFW · SS hub · A312 Welded twin

Also see: Stainless steel pipe & tube hub · Seamless pipe · Buttweld fittings · Flanges.

What is A312 TP321H?

321H pipe to A312/SA312 for general corrosive service. Strength guide: per SA-312 TP321H — confirm PO.

Typical applications

• High-temperature refinery / chemical piping
• Creep-range stainless lines requiring Ti stabilisation

Selection guidance

Only when 321H is named. Pair with correct filler / heat treatment notes on the WPS.

ASTM A312 TP321H Stainless Steel Seamless Pipes Range

Chemical Composition of ASTM A312 TP321H Stainless Steel Seamless Pipes

The chemical composition of grade 321H Stainless Steel is outlined in the following table Typical compositional ranges for grade 321 stainless steels Pipes

Mechanical Properties of ASTM A312 TP321H Stainless Steel Seamless Pipes

The Mechanical Properties of grade 321H Stainless Steel are displayed in the following table.

ASTM A312 TP321H Stainless Steel Seamless Pipes Physical Properties

Physical properties of 321H grade stainless steel in the annealed condition

grade Specification Comparison for ASTM A312 TP321H Stainless Steel Seamless Pipes

Grade specifications for 321H grade stainless steel

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
321	S32100	321S31	58B, 58C	1.441	X6CrNiTi18-10	2337	SUS 321
321H	S32109	321S51	-	1.4878	X10CrNiTi18-10	-	SUS 321H
347	S34700	347S31	58G	1.450	X6CrNiNb18-10	2338	SUS 347
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

ASTM A312 TP321H Stainless Steel Seamless Pipes Apllicantion

The grade 321H steel can be made into plates, sheets, and coils to be used in the following:

• Food preparation equipment particularly in chloride environments.
• Laboratory benches & equipment.
• Coastal architectural panelling, railings & trim.
• Boat fittings.
• Chemical containers, including for transport.
• Heat Exchangers.
• Woven or welded screens for mining, quarrying & water filtration.
• Threaded fasteners.
• Springs.

ASTM A312 TP321H Stainless Steel Seamless Pipes Nominal Bore Sizes

• 1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1-1/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 1-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 2-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 3-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 5" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 6" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 8" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 10" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 12" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 14" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 16" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
• 18" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Frequently asked questions — ASTM A312 TP321H Seamless Pipe

What is ASTM A312 TP321H?

A312 TP321H is austenitic stainless seamless pipe, UNS S32109, for corrosive and high-temperature service as specified.

Seamless or welded?

This page is the seamless product form. Welded/ERW is listed on the twin page when the PO allows.

321H chemistry?

Ti-stabilised 321 with H-grade carbon

Documents?

EN 10204 3.1 MTC standard; 3.2 and TPI on request.

Export & documentation

We supply this product for domestic and export projects with MTC (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, Incoterms and inspection needs on the RFQ.