ASTM A312 TP321H Stainless Steel Pickeld and Annealed Pipe
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ASTM A312 TP321H stainless steel pickled and annealed pipe is a high-performance austenitic stainless steel tube engineered for high-temperature and high-pressure applications.By incorporating controlled carbon content (0.04–0.10%) and titanium (≥5×C–0.70%), it effectively prevents intergranular corrosion, thereby enhancing creep resistance and structural stability. Compared to standard TP321, the H-grade has a stricter carbon content requirement (limited to 0.04% max) to ensure superior creep strength and elevated-temperature endurance.
Our supplied ASTM A312 TP321H stainless steel pickled and annealed pipes are manufactured using hot rolling or cold drawing processes, followed by a critical "pickled and annealed" (bright annealed) surface treatment. Pickling removes surface oxides and scales generated during heat treatment, while annealing (typically performed at 1000–1100°C) refines the microstructure, optimizes grain boundaries, and ensures a clean, corrosion-resistant surface.These pipes are widely used in power plant boilers, superheaters, high-temperature process piping systems, and other applications exposed to demanding thermal environments.
ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
Outside Diameter: 6.00mm to 914.4mm, 1/2" to 48"
Thickness Range: 0.3mm - 50mm, SCH 5, SCH 10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Length: single random, double random and required length
Technique: Hot rolling, Hot work, Cold rolling, Cold drawn
Form: Seamless Pipe & Tube, SAW/ERW/EFW Pipe & Tube
End: PE(plain end), BE(beveled end)
Standard: ASME B36.10, ASME B36.19
ASTM A312 Stainless Steel Seamless Pipe Chemical Composition
| GRADE |
UNS. |
ASTM A312 CHEMICAL COMPOSITION % MAXIMUM | |||||||
|---|---|---|---|---|---|---|---|---|---|
| C | MN | P | S | SI | CR | NI | Ti | ||
| TP321H | S32109 | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 |
4(C+N) min; 0.70 max |
ASTM A312 TP321H Stainless Steel Seamless Pipe Mechanical Properties
| SS GRADE | HEAT TREATMENT | Tensile Strength, min ksi [MPa] | Yield Strength, min ksi [MPa] | |
|---|---|---|---|---|
| Cold Finished | Hot Finished | |||
| TP321H | 2000 °F [1100 °C] | 1925 °F [1050 °C] | 75 [515] | 30 [205] |
321 SS Welded Pipe Tolerances
| NPS | ASTM A312 TP321 OD Tolerance | |||
| + | – | |||
| inch | mm | inch | mm | |
| 1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 |
1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) |
0.4 0.8 1.6 2.4 3.2 4.0 4.8 |
1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) |
0.8 0.8 0.8 0.8 0.8 0.8 0.8 |
ASTM A312 TP321H Stainless Steel Pipe Application
Petrochemical Industry: Process piping for catalytic cracking units, reforming units, and heating furnaces, especially suitable for pipe sections requiring frequent welding.
Power Generation (Thermal Power): Superheater and reheater piping in boilers, as well as high-temperature and high-pressure systems such as main steam piping.
Thermal Engineering: Heat exchangers and high-temperature flue gas piping.
Food and Pharmaceutical Industry: Due to its smooth, clean pickling surface and corrosion resistance, it can be used for certain process piping applications.
Quality Control System
Implementing:
Raw material PMI verification
In-process EC/UT non-destructive testing
100% dimensional inspection
All test records and photos are traceable with available SGS/TUV sampling reports. Our three-tier QC system guarantees consistent composition and stable performance across every TP321H batch, streamlining distributors' incoming inspection.
AISI 321 Stainless Steel Pipe Price List
| Product | Price |
|---|---|
| 321 Stainless steel capillary tube | $1,500.00 - $2,380.00/ Ton |
| 3/4 Sch 40 SS 321 Pipe | $1,450.00 - $1,600.00/ Ton |
| Surface Polished Finish 20mm diameter 321 Seamless stainless steel pipe | $1,800.00 - $2,170.00/ Ton |
| 321 2 Inch 8 Inch Seamless Stainless Steel Pipe | $990.00 - $2,250.00/ Ton |
Many suppliers, stockholders, distributors, wholesalers, importers, retailers, exporters, and distributors of 321 stainless steel pipe choose us because we offer the best prices on ASTM A312 TP321H pipe. At GNEE, you can find our stock of ASTM A312 TP321 grade exhaust pipes and choose the appropriate size to meet your needs. Contact us today for a quick quote!Email: info@gneestainless.com
Payment Terms
Gnee offers flexible payment options for global buyers:
* Wire Transfer: 30% prepayment, 70% before shipment
* Letter of Credit at sight
* Western Union/PayPal available for sample orders
* Trade Terms: EXW, FOB, CIF, CFR, DDP available upon request
* All transactions are supported by International Trade Assurance and SGS/BV inspection services.
Packaging & Shipping
* Packaging: Each tube is wrapped in moisture-proof paper, lined with plastic film, and secured with steel straps. The outer layer is protected with wooden pallets or crates to ensure safe international transport.
* Marking: Each package includes furnace number, grade, dimensions, and standard information.
* Delivery Time: Typically within 7-15 business days after receiving prepayment.
* Shipping Method: Sea freight (FCL/LCL), air freight, or express, depending on customer requirements.
