PTM Products and Specifications
Printable Version of Charts 
Pressure Tube and Capillary Tubing
Product Characteristics
ASTM Referenced Specifications
| Grades | 304L and 316L Stainless Steel, Nickel-Base Alloys 625 and 825, and Duplex Stainless Steel 2205 Additional alloys to be added as required to meet customer needs |
| Sizes | |
| Outside Diameter | 1/8 to 5/8 inch (0.125 to 0.625 inch) |
| Wall Thickness | 0.010 to 0.065 inch |
| Lengths | Up to 100,000 feet of more, depending on tube size and customer requirements |
| Tolerances | |
| Outside Diameter | ± 0.005 inch |
| Wall Thickness | ± 10% |
| Lengths | -0 feet /+20 feet |
| ASTM Specifications | Meets or exceeds the requirements for welded tubing in ASTM Specifications A269, A554, A632, B704, and A789 |
| Mechanical and Physical Properties of Stainless Steels, Nickel-Base Alloys, and Duplex Stainless Steels in the Heat-Treated Condition at Ambient Temperature (Mechanical Properties Are Based on A632, B704, A789, and strip supplier data sheets) | |||||
| Alloy 625 (Grade 1) |
Alloy 825 | 2205 | 316L | 304L | |
| Ultimate Tensile Strength, min (PSI) | 120,000 | 85,000 | 95,000 | 70,000 | 70,000 |
| Yield Strength (.2%Offset), min (PSI) | 60,000 | 35,000 | 70,000 | 25,000 | 25,000 |
| Elongation (in 2 inches), min | 30 | 30 | 25 | 35 | 35 |
| Hardness, max | — | — | 30HRC | — | — |
| Modulus of Elasticity (x106 PSI) | 29.8 | 28.3 | 27.5 | 28.0 | 28.0 |
| Avg. Coefficient of Thermal Expansion from 70 °F to 200 °F (in./in./°F x 10-6) |
7.1 | 7.8 | 7.6 | 9.2 | 9.2 |
| Density (lbs/in3) | 0.305 | 0.293 | 0.285 | 0.290 | 0.287 |
| ASTM Specification | Title | Description |
| A-269 | Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service |
This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service |
| A-554 | Standard Specification for Welded Stainless Steel Mechanical Tubing |
This specification covers welded stainless steel tubing for mechanical applications where appearance, mechanical properties, or corrosion resistance is needed |
| A-632 | Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service |
This specification covers grades of stainless steel tubing in sizes under 1/2 in. down to 0.050 in. in outside diameter and wall thicknesses less than 0.065 in. down to 0.005 in. for general corrosion-resisting and low- or high-temperature service |
| B-704 | Standard Specification for Welded UNS N06625, UNS N06219 and UNS N08825 Alloy Tubes |
This specification covers welded UNS N06625, UNS N06219 and UNS N08825 alloy boiler, heat exchanger, and condenser tubes for general corrosion resisting and low- or high-temperature service |
| A-789 | Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service |
This specification covers grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking |
