ASTM A358 TP321 CLASS 1 EFW STAINLESS STEEL ELECTRIC FUSION WELDED PIPE
YUHONG GROUP deal with Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy ) seamless and welded pipe and tube already more than 25 years, every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 45 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Korea, Singapore, Austrial, Poland, France , ....And our group branch company and factory have been already approved by :ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.
YUHONG SPECIAL STEEL deal with stainless steel welded pipe and tube already more than 10 years, every year sell more than 5000 tons of stainless steel pipe and tube. Our client already cover more than 45 countries. Our stainless steel seamless pipe and tube was width used in Mining, Energy, Petrochemical, Chemical Industry, Food plant, Paper plant, Gas and Fluid Industry etc.
ASTM A358 TP321 Stainless Steel EFW / Electric Fusion Welded Pipe:
ASTM A358 TP321 Stainless Steel EFW Pipes is available available in sizes from 1/8” through to 64” Nominal Bore.
Chemical Composition of SS321/321H/347
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other |
| 321 | min.
max | -
0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0
19.0 | - | 9.0
12.0 | 0.10 | Ti=5(C+N)
0.70 |
| 321H | min.
max | 0.04
0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0
19.0 | - | 9.0
12.0 | - | Ti=4(C+N)
0.70 |
| 347 | min.
max | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0
19.0 | - | 9.0
13.0 | - | Nb=10(C+N)
1.0 |
Mechanical properties
| 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
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) |
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C |
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Grade specifications for SS321/321H/347
| 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 materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. |
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A358 TP321 CLASS 1 EFW STAINLESS STEEL ELECTRIC FUSION WELDED PIPE Images
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