ASTM TP321 UNS S32100 Seamless Stainless steel Tube Sch40S Used in Heat Exchanger
Introduction to products:
At the temperature of 800-1500°F (427-816°C), chromium carbide
precipitation conditions can still maintain good resistance to
intergranular corrosion. Due to the addition of titanium to the
composition, 321 alloy can still maintain stability in the case of
chromium carbide formation.
321 alloy stainless steel has the advantage of working in high
temperature environment due to its excellent mechanical properties.
Compared with 304 alloy, 321 alloy stainless steel has better
ductility and stress fracture resistance.
Description for our production range:
Name :Stainless Steel seamless Pipe
Standard :EN10216-5 , EN10216-2,DIN 17456 , DIN 17458,ASTM A312,
A213, A269, A511, A789, A790 ETC,GOST 9941 , GOST 5632,
JIS G3459 , JIS G3463,GB/T14975,GB/T14975, GB13296, GB5310, GB9948
Material Grade :
TP321/321H
Diameter :OD: 6-830mm
W.T: 0.6mm - 60mm
Length :Up to 13 meter or as customers' request
Tolerance :According to the Standard.
Surface :
Natural Color of annealing & pickling, 180G, 320G, 400G Satin /
Hairline
400G, 500G, 600G or 800G Mirror finish
Test :
UT, ET, HT, RT,ect, and others according to the standard,
or as the requests of the customer
our products packing:
APPLICATIONS :
- Stainless steel Reheater Tubes and Superheater Tubes for Boiler
- Aircraft exhaust manifolds
- Expansion joints
- Bellows
- Furnace parts
- Heating element tubing
- Heat Exchanger
Physical Properties
AISI 321 steel physical properties are given in the following
lists, including density, thermal expansion, elastic modulus,
thermal conductivity, specific heat capacity and electrical
resistance.
| SS321 Physical Properties |
| Density, g/cm3 (lb/in.3) | 7.9 (0.29) |
| Melting point, °C (°F) | 1400-1425 (2550-2600) |
| Specific heat capacity, J/kg·K (Btu/lb ·°F) | 500 (0.12) at 20 °C |
| Electrical resistivity, μΩ·m | 0.72 at 20 °C |
| Magnetic permeability | 1.02 (Approximate) |
| Elastic modulus, GPa (106 psi) | 193 (28) |
| Thermal conductivity, W/m·K (Btu/ft · h ·°F) | 16.1 (9.3) at 100 °C (212 °F) |
| 22.2 (12.8) at 500 °C (932 °F) |
| Coefficient of thermal expansion, 10-6/K (μin./in. ·°F) | 16.6 (9.2) at 0-100 °C (32-212 °F) |
| 17.2 (9.6) at 0-315 °C (32-600 °F) |
| 18.6 (10.3) at 0-538 °C (32-1000 °F) |
Notes:
10-6·K-1 = 10-6/K
1 Ω·mm²/m = 1 μΩ·m
1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
1 GPa = 1 kN/mm2
1 MPa = 1 N/mm2
other supplement:
1.A999/A999M: Each pipe shall be subjected to the nondestructive
electric test or the hydrostatic test, the pipe of test to be used
shall be at the option of the mfg, unless otherwise specified in
the PO.
2. The Pipe lengths : Unless otherwise agreed upon, all size from
NPS 1/8" TO AND INCLUDING nps 8 are available in a length up to
24ft with the permitted range of 15 to 24 ft. Short length are
acceptable and the number and min, length shall be agreed upon
between mfg and purchaser.
3. The finished pipe shall be reasonably straight and shall have
workmanlike finish, Removal of imperfections by grinding is
permitted, provided the W.T are not decreased to the less than the
permitted in Section 9 of Specification A999/A999M
4. Butt Weld End: According to ANSI B 16.25
5. Pipe Marking: Specified in A999/999M, include
"Logo+Standard+SIZE+Heat No.+Lot No.+H.T/E.T/U.T"
6. Packing: Each Pipe end is protected by Plastic cap. Then packed
by Anti-rust steel strip, The outside of the bundle is plastic
woven bag, or Plastic film.
7. Packing Mark: SIZE + STEEL GRADE+ QTY OF PIECE/WEIGHT/METRE.
8.MTC: BWSS Official Original MTC paper will be supplied for each
order.
