ASTM A312 TP321 Stainless Steel Seam Pipes & Tubes
Introduction:
GANYEAH GROUP is the most acclaimed manufacturer, exporter, distributor and supplier of industrial ASTM A312 TP321 Stainless Steel Seam Pipes & Tubes with required test certificates. You can also Order small quantities, we will be happy to quote best price for small and large quantities & can typically deliver the ASTM Steel Pipe Large Diameter in minimum time frame anywhere around the globe.
Our broad product range makes your individual wishes possible and also meets the extraordinary demands.
ASTM Steel Pipe Large Diameter specification
Tubing Size : 1/8"NB TO 30"NB IN
Specialized in : Large Diameter Size
Tubing Schedule: SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Tubing Type : Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form : Round, Square, Rectangular, Hydraulic Etc.
Length : Single Random, Double Random & Cut Length.
Tubing End : Plain End, Beveled End, Treaded.
Production according to national and international standards (e.g. ASME, ASTM, API, EN, DNV, etc.)
Origin: China
We can produce according to Your Required Specification
Table 1. Composition ranges for 321 grade stainless steel
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
321 | min. | – | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 | – | 9.0 | 0.10 | Ti=5(C+N) |
321H | min. | 0.04 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 | – | 9.0 | – | Ti=4(C+N) |
347 | min. | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 | – | 9.0 | – | Nb=10(C+N) |
Mechanical Properties of ASTM Steel Pipe Large Diameter
Typical mechanical properties for grade 321 stainless steels are given in table 2.
Table 2. Mechanical properties of 321 grade stainless steel
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
321 | 515 | 205 | 40 | 95 | 217 |
321H | 515 | 205 | 40 | 95 | 217 |
347 | 515 | 205 | 40 | 92 | 201 |
321H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
Physical Properties of 321 Stainless Steel Pipes and Tubes
Typical physical properties for annealed grade 321 stainless steels are given in table 3.
Table 3. Physical properties of 321 grade stainless steel in the annealed condition
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | |||
0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||
321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 |
Grade Specification Comparison of 321 Stainless Steel Pipes and Tubes
Approximate grade comparisons for 321 stainless steels are given in table 4.
Table 4. Grade specifications for 321 grade stainless steel
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
321H | S32109 | 321S51 | – | 1.4878 | X10CrNiTi18-10 | – | SUS 321H |
347 | S34700 | 347S31 | 58G | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 |
These comparisons are approximate only. The list is intended as a comparison of functionally similar material not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. | |||||||
