Creep Resistance Steel
Round Bar
Square Bar
Round Corner Square Bar
Hot Rolled Bar
Forged Bar
Machined Bar
Bright Bar
Wire rod
Coil
Sheets-Plates
Pipe Fittings
Pipe
Creep-resistant steel is an essential engineering material designed specifically to withstand the long-term effects of high-temperature exposure and constant mechanical stress. In industrial applications where components operate near their melting points, standard steels often undergo "creep"—a slow, permanent deformation that can lead to catastrophic structural failure over time. By utilizing advanced alloying techniques, this specialized steel maintains its dimensional stability and load-bearing capacity, ensuring the safety and longevity of critical infrastructure in thermal environments.
The superior performance of these alloys is achieved through the precise addition of elements such as chromium, molybdenum, and vanadium. These components work at a metallurgical level to create stable carbides and prevent the movement of crystal defects within the metal's grain structure. This results in a material that not only resists physical stretching and thinning but also provides exceptional resistance to oxidation and steam corrosion, which are common challenges in high-heat operations.
Specification
| Grade Specification | Chromium (Cr) % | Molybdenum (Mo) % | Typical Applications |
|---|---|---|---|
| ASTM A182 / A335 F5 / T5 | 4.00 – 6.00 | 0.45 – 0.65 | Refinery service, high-heat exchangers. |
| ASTM A182 / A335 F9 | 8.00 – 10.00 | 0.90 – 1.10 | Chemical and petrochemical processing. |
| ASTM A182 / A335 F11 | 1.00 – 1.50 | 0.44 – 0.65 | Power generation and high-pressure steam. |
| ASTM A182 / A335 F12 | 0.80 – 1.25 | 0.44 – 0.65 | Main steam lines and thermal plants. |
| ASTM A182 / A335 F22 | 2.00 – 2.50 | 0.87 – 1.13 | Oil & gas equipment, boiler components. |
| ASTM A182 / A335 F91 | 8.00 – 9.50 | 0.85 – 1.05 | Ultra-supercritical power plant piping. |
| ASTM A182 / A335 F92 | 8.50 – 9.50 | 0.30 – 0.60 | Advanced heat recovery steam generators. |
| 9Cr (9Cr-1Mo) | 8.00 – 10.00 | 0.90 – 1.10 | High-temperature corrosive environments. |
| 13Cr (Martensitic) | 11.50 – 13.50 | - | Pump shafts, valves, and wear parts. |
Chemical Composition of Creep Resistance Steel
| Grade | C (%) | Mn (%) | Si (%) | Cr (%) | Mo (%) | P (max) | S (max) | Others (%) |
|---|---|---|---|---|---|---|---|---|
| F5 / T5 | 0.15 max | 0.30–0.60 | 0.50 max | 4.00–6.00 | 0.45–0.65 | 0.030 | 0.030 | - |
| F9 | 0.15 max | 0.30–0.60 | 0.50–1.00 | 8.00–10.00 | 0.90–1.10 | 0.030 | 0.030 | - |
| F11 (Cl. 2) | 0.10–0.20 | 0.30–0.80 | 0.50–1.00 | 1.00–1.50 | 0.44–0.65 | 0.030 | 0.030 | - |
| F12 (Cl. 2) | 0.10–0.20 | 0.30–0.80 | 0.50 max | 0.80–1.25 | 0.44–0.65 | 0.030 | 0.030 | - |
| F22 (Cl. 3) | 0.05–0.15 | 0.30–0.60 | 0.50 max | 2.00–2.50 | 0.87–1.13 | 0.030 | 0.030 | - |
| F91 | 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | 8.00–9.50 | 0.85–1.05 | 0.020 | 0.010 | V: 0.18-0.25, N: 0.03-0.07 |
| F92 | 0.07–0.13 | 0.30–0.60 | 0.50 max | 8.50–9.50 | 0.30–0.60 | 0.020 | 0.010 | W: 1.5-2.0, B: 0.001-0.006 |
| 9Cr (9Cr-1Mo) | 0.15 max | 0.30–0.60 | 0.50–1.00 | 8.00–10.00 | 0.90–1.10 | 0.030 | 0.030 | - |
| 13Cr (AISI 410) | 0.15 max | 1.00 max | 1.00 max | 11.50–13.50 | - | 0.040 | 0.030 | - |