ASTM A213 TP321H Seamless Tube for Shell and Tube Heat Exchanger & Boiler
Product Overview
Yuhong Group Co., Ltd. specializes in heat exchangers, pressure vessels, air coolers, tube bundles, U-tubes, finned tubes, tubesheets, baffles, and heads. Our core strength lies in heat-exchanger tubing and bundle integration, with ASTM A213 TP321H supplied as part of a controlled fabrication chain rather than as an isolated tube item.
Product Specifications: ASTM A213 TP321H / UNS S32109
| Item |
Requirement |
| Standard |
ASTM A213/A213M-23 (ASME SA-213/SA-213M identical with additional H-grade requirements) |
| Grade / UNS |
TP321H / S32109 |
| Product form |
Seamless tube, hot finished or cold finished |
| Size range |
1/2 in [3.2 mm] ID to 5 in [127 mm] OD; wall 0.015-0.500 in [0.4-12.7 mm] |
| Solution treatment |
2000°F [1100°C] min |
| Cooling |
Water or other rapid cool |
| Grain size |
ASTM No. 7 or coarser |
| Tensile strength, min |
75 ksi [515 MPa] |
| Yield strength, min |
30 ksi [205 MPa] |
| Elongation, min |
35% |
| Hardness, max |
192 HBW / 200 HV / 90 HRB |
Chemical Composition: ASTM A213/A213M TP321H
| Element |
Range |
| C |
0.04-0.10 |
| Mn |
2.00 max |
| P |
0.045 max |
| S |
0.030 max |
| Si |
0.75 max |
| Cr |
17.0-19.0 |
| Ni |
9.0-12.0 |
| Ti |
4(C+N) min, 0.60 max |
| Fe |
Balance |
Manufacturing, Heat Treatment, and Testing
TP321H is an H-grade austenitic stainless steel. Under the H-grade requirements, seamless tubing must be reheated to the specified solution-treatment temperature and held for the required time before quenching. Direct quenching after hot forming is not permitted for H grades. The specified solution treatment is 2000°F [1100°C] min, followed by water or other rapid cooling. Grain size must be ASTM No. 7 or coarser.
Inspection and Testing Requirements
| Inspection / Test |
Requirement |
| Product analysis |
One billet or one tube per heat; retests per ASTM A213/A213M |
| Tension |
One tube for lots ≤50 tubes; two tubes for lots >50 tubes |
| Hardness |
Two tubes per lot |
| Flattening |
One finished tube, both ends, per lot |
| Flaring |
One finished tube, both ends, per lot |
| Grain size |
One end of one finished tube per lot |
| Hydrostatic or NDE |
Each tube |
Supporting Fabrication and Material Grades
Yuhong supports downstream fabrication for ASTM A213 TP321H tubes, including U-bending, finning, cutting, beveling, tube-sheet matching, baffle and head supply, and tube-bundle assembly. Related ASTM A213 austenitic grades can also be supplied, such as TP304/304L, TP316/316L, TP321, and TP347, subject to specification.
Applications
ASTM A213 TP321H tubes are used in heat exchangers, boilers, superheaters, pressure vessels, air coolers, petrochemical units, power generation, and chemical processing where a stabilized austenitic stainless steel is required for elevated-temperature service.
Why TP321H and Custom Services
TP321H contains titanium for stabilization and has an H-grade chemistry and heat-treatment route designed to provide higher creep-rupture strength than the non-H grade. The controlled carbon range, 2000°F [1100°C] min solution treatment, rapid cooling, ASTM No. 7 or coarser grain size, and hardness maximum of 192 HBW / 200 HV / 90 HRB provide measurable consistency for high-temperature tubing. Custom options include U-bends, finned tubes, specific lengths, end finishes, and bundle-level documentation.
Frequently Asked Questions
What is the difference between TP321 and TP321H?
TP321H has a controlled carbon range of 0.04-0.10 and a minimum solution treatment of 2000°F [1100°C]. The H-grade requirements are intended to provide higher creep-rupture strength.
Can TP321H be direct quenched after hot forming?
No. Under the H-grade requirements, TP321H must be reheated to the specified solution-treatment temperature and held for the required time before quenching.
What grain size is required?
ASTM No. 7 or coarser.
Which tests are normally performed?
Product analysis, tension, hardness, flattening, flaring, grain size, and hydrostatic or nondestructive electric testing.
Is TP321H suitable for U-bend heat exchangers?
Yes. With controlled straightness, heat treatment, and bendability, it is used in U-tube bundles and high-temperature heat-exchange equipment.
Your message must be between 20-3,000 characters!
