ASTM A269/213 TP321 GRADE SS SMLS TUBE
Introduction
TP321 is a titanium (Ti)-stabilized austenitic stainless steel, an improved variant of the 18-8 stainless steel (Cr-Ni series). The addition of titanium (Ti) effectively suppresses the precipitation of chromium carbides (Cr₂₃C₆) at grain boundaries, significantly enhancing the material's resistance to intergranular corrosion, making it ideal for high-temperature and sensitization-prone environments.
Key Features
Titanium Stabilization:
Contains titanium(Ti ≥5×C) to prevent chromium carbide (Cr₂₃C₆) formation at grain boundaries.
Eliminates sensitization risk during welding or exposure to 450–850°C, ensuring resistance to intergranular corrosion.
High-Temperature Performance:
Operating range: -196°C to 800°C (short-term up to 900°C).
Oxidation resistance: Stable in air, steam, and oxidizing atmospheres.
Corrosion Resistance:
Superior to 304/304L in chloride stress corrosion cracking and weak acid environments (e.g., nitric/organic acids).
Resists alkalis and sensitization-induced degradation.
Fabrication Advantages:
Weldability: Excellent; no post-weld heat treatment required.
Cold working: Requires intermediate annealing to mitigate work hardening.
Cost-Effective Alternative:
More economical than TP316 (no molybdenum) while offering better high-temperature stability than TP304.
Material Specification
Standard: ASTM A269&A213
O.D: 1/8" NB TO 32" NB , (10.29MM-812.80MM) ,(Customization Available)
W.T: SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)
Application: Aerospace Industry
Electronics Industry
Instrumentation and Control Systems
Power Generation (Thermal Power Plants)
Petrochemical and Refining
Food and Beverage Industry
Pharmaceutical and Biotechnology
Beverage Packaging and Dairy Equipment
End: Plain End, Beveled End, Threaded
Processing: Cut-to-length;Polishing.
Inspection:
100% PMI TESTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED
Delivery Condition: Cold Drawn, Annealed and Pickled/ Polished /Bright Annealed/ Sand blasting/ Shot Blasting.
Marking: All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)
Packing: Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
Specials: Sizes and Specifications other than above can be customized on request.
Specification parameters
CHEMICAL COMPOSITION - TP321 (ASTM A269/A269M)
|
HEAT NO. |
CHEMICAL COMPOSITION (%) |
||||||||
|
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Ti |
||
|
STAND. |
MIN. |
9.00 |
17.00 |
||||||
|
MAX. |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
12.00 |
19.00 |
D |
|
CHEMICAL COMPOSITION - TP321 ( ASTM A213/A213M )
|
HEAT NO. |
CHEMICAL COMPOSITION (%) |
||||||||
|
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Ti |
||
|
STAND. |
MIN. |
9.00 |
17.00 |
||||||
|
MAX. |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
12.00 |
19.00 |
5(C+N)-0.70 |
|
Mechanical Properties
|
Mechanical Properties |
|||||
|
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness MAX |
|
|
Rockwell (HRB) |
Brinell (HBW) |
||||
|
ATSM A269 TP321 |
90 |
192 |
|||
|
ATSM A213 TP321 |
515 |
205 |
35 |
90 |
192 |
Equivalent Grades - (ASTM A269&A213 TP321 Equivalent Grades)
| ASTM A269&A213 TP321 Equivalent Grades | ||||||
| USA (ASTM/ASME/AISI) | Japan (JIS) | Germany (DIN/EN) | China (GB) | International (ISO) | United Kingdom(BS) | Russia(GOST) |
| TP321 UNS S32100 321 S32100 | JIS G4304 | X10CrNiTi18-9 (DIN) 1.4541 (EN) | 06Cr18Ni11Ti(NEW) 1Cr18Ni9Ti (Old) S32168 | X6CrNiTi18-10 | 304S12 321S20 (historical) | 12Х18Н10Т |
ASTM A269/A269M Standard Cold Machining Size Deviation Permitted
| ASTM A269/A269M Standard cold machining size deviation permitted | ||||||
| Group | Size,Outside Diameter,in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Wall Thickness,A% | Permissible Variations in Cut Length, in. [mm]B | Thin Walled TubesC | |
| Over | Under | |||||
| 1 | Up to 1/2 [13] | ±0.005[0.13] | ±15 | 1/8[3.2] | 0 | ... |
| 2 | 1/2 to 1 1/2 [13 to 38], excl | ±0.005[0.13] | ±10 | 1/8[3.2] | 0 | less than 0.065in. [1.65mm]nominal |
| 3 | 1 1/2 to 3 1/2 [38 to 89], excl | ±0.010[0.25] | ±10 | 3/16[4.8] | 0 | less than 0.095 in. [2.41 mm]nomina |
| 4 | 3 1/2 to 5 1/2 [89 to 140], excl | ±0.015[0.38] | ±10 | 3/16[4.8] | 0 | less than 0.150 in. [3.81 mm]nominal |
| 5 | 5 1/2 to 8 [140 to 203], excl | ±0.030[0.76] | ±10 | 3/16[4.8] | 0 | less than 0.150 in. [3.81 mm]nominal |
| 6 | 8 to 12 [203 to 305], excl | ±0.040[1.01] | ±10 | 3/16[4.8] | 0 | less than 0.200 in. [5.08 mm]nominal |
| 7 | 12 to 14 [305 to 356], excl | ±0.050[1.26] | ±10 | 3/16[4.8] | 0 | less than 0.220 in. [5.59 mm]nominal |