what is 1.4845 Seamless Pipes ?
1.4845 seamless pipe (commonly referred to as AISI 310S) is a high-performance, heat-resistant austenitic stainless steel pipe typically utilized in high-temperature applications reaching up to 1150°C. Distinguished by its exceptional resistance to oxidation and high-temperature corrosion attributes conferred by its high chromium and nickel content-this durable piping material is widely employed across critical industrial sectors, including petrochemicals, furnaces, and heat exchangers.
What is en 10216 5 material?
EN 10216-5 is a European standard for seamless stainless steel tubes, specifically designed for applications requiring pressure resistance and corrosion resistance. This standard covers austenitic and duplex stainless steels, with key grades including 1.4301 (304), 1.4404 (316L), and 1.4845 (310S). These tubes are widely utilized in industries such as chemical processing, food production, and power generation.
What is the equivalent grade of 1.4845 stainless steel?
Material 1.4845 (X8CrNi25-21) is primarily equivalent to AISI 310S (UNS S31008). It is an austenitic heat-resistant stainless steel known for high chromium and nickel content, offering excellent oxidation resistance at temperatures up to 1050°C-1100°C.
| Standard | Grade / Number |
| EN / DIN | 1.4845 / X8CrNi25-21 |
| AISI / ASTM | 310S |
| UNS | S31008 |
| JIS | SUS 310S |
1.4845 Pipes Chemical Composition (% by weight)
| Element | Symbol | Min (%) | Max (%) |
| Carbon | C | - | 0.08 |
| Silicon | Si | - | 1.50 |
| Manganese | Mn | - | 2.00 |
| Phosphorus | P | - | 0.045 |
| Sulfur | S | - | 0.015 |
| Chromium | Cr | 24.00 | 26.00 |
| Nickel | Ni | 19.00 | 22.00 |
| Nitrogen | N | - | 0.11 |
1.4845 Seamless Pipes Mechanical Properties ( at Room Temperature)
| Property | Value (Metric) | Value (Imperial) |
| Tensile Strength (Rm) | 500 - 700 MPa | 72.5 - 101.5 ksi |
| Yield Strength (Rp0.2) | ≥ 210 MPa | ≥ 30.5 ksi |
| Elongation (A5) | ≥ 35 % | ≥ 35 % |
| Hardness (Brinell) | ≤ 192 HB | - |
| Hardness (Rockwell B) | ≤ 90 HRB | - |
1.4845 stainless steel Physical Properties
| Property | Value |
| Density | 7.98 g/cm3 |
| Melting Range | 1350 - 1400 °C |
| Modulus of Elasticity | 200 GPa (at 20°C) |
| Thermal Conductivity | 14.2 W/(m⋅K)(at 20°C) |
| Specific Heat | 500 J/(kg⋅K)(at 20°C) |
| Scaling Temp. in Air | approx. 1050 °C |
1.4845 Heat-Resistant Stainless Steel Tube Applications
Heat Treatment: Furnace parts, conveyor belts, annealing covers.
Energy & Industrial: Heat exchangers, recuperators, steam systems.
Chemical/Petrochemical: High-temperature processing equipment, retorts, and muffles.
What is the maximum service temperature for 1.4845 pipes?
1.4845 pipes exhibit excellent oxidation resistance. In continuous service, they can withstand temperatures up to 1050°C - 1100°C (1922°F - 2012°F). In intermittent service, they can reach up to 1035°C.
What is the difference between 1.4841 and 1.4845?
While both are high-temperature grades, 1.4845 (310S) has a lower carbon content (max 0.08%) compared to 1.4841 (310) (max 0.20%). This lower carbon content in 1.4845 minimizes carbide precipitation during welding, making it better for welded structures.
Are 1.4845 seamless pipes magnetic?
No. 1.4845 is an Austenitic stainless steel, which means it is non-magnetic in the annealed and cold-worked conditions.
Leveraging China's robust stainless steel supply chain, Gnee is able to offer unit prices that are more competitive than those of European and American suppliers, thereby directly reducing our clients' project costs. Grade 1.4845 (310S) is a specialized heat-resistant steel, and stock is typically unavailable at smaller-scale manufacturers. Gnee, however, typically maintains an inventory of standard dimensions, allowing us to shorten lead times from several months down to just 7–15 days. We provide complete EN 10204 3.1 Material Test Certificates (MTCs).
Specification for 1.4845 / 310S Seamless Pipe
| Item | Specification Details |
| Material Grade | 1.4845 / X8CrNi25-21 / AISI 310S / UNS S31008 |
| Standard | ASTM A312, ASTM A213, EN 10216-5, JIS G3459, DIN 17456 |
| Pipe Type | Seamless (Cold Drawn / Cold Rolled) |
| Outside Diameter (OD) | 6.0 mm to 630 mm (NPS 1/8" to 24") |
| Wall Thickness (WT) | 0.5 mm to 60.0 mm (SCH 5S, 10S, 40S, 80S, 160, XXS) |
| Length | Single Random (5-7m), Double Random (10-12m), or Fixed Length |
| Surface Finish | Annealed & Pickled (AP), Polished (Grit 180#, 320#, 400#), Mirror |
| End Finish | Plain End (PE), Beveled End (BE), Threaded End |
| Tolerance | According to ASTM A530 or EN ISO 1127 |
| Testing | Hydrostatic, Ultrasonic (UT), Eddy Current (ET), PMI, Destructive Tests |
| Certification | EN 10204 3.1 MTC, ISO 9001, PED, SGS/BV Inspection |
Detailed Dimension Range
| NPS (Inch) | Outside Diameter (mm) | Wall Thickness (Schedule) |
| 1/8" - 2" | 10.3 mm - 60.3 mm | SCH 5S, 10S, 40S, 80S |
| 2 1/2" - 6" | 73.0 mm - 168.3 mm | SCH 10S, 40S, 80S, 160 |
| 8" - 12" | 219.1 mm - 323.9 mm | SCH 10S, 20, 40S, 80S |
| 14" - 24" | 355.6 mm - 610.0 mm | SCH 10S, 20, STD, 40, 80 |
