253 MA® was developed over 30 years ago, when the need for a heat resistant stainless steel with high strength and good oxidation resistance was required in the industry.
| % | Cr | Ni | Si | C | Mn | P | S | N | Ce | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | 20 | 10 | 1.40 | 0.05 | - | - | - | 0.14 | 0.03 | Balance |
| Max | 22 | 12 | 2 | 0.10 | 0.80 | 0.04 | 0.03 | 0.20 | 0.08 | - |
Despite its lean nickel content, 253 MA® alloy offers an outstanding combination of creep strength and high resistance to oxidation, sulphidation and erosion/abrasion at extremely high temperatures. This makes the alloy more economical than most heat resistant alloys.
The high heat resistant properties of 253 MA® are obtained by the tight control of micro alloy additions. Whilst the benefit of creep rupture strength is down to the combination of nitrogen, carbon and cerium, its superior oxidation resistance is a result of the combination of cerium and silicon.
253 MA® is the registered trademark of Outokumpu Stainless.
Contact us for more information on 253 MA® alloy!
| Mechanical & Physical Properties | 21⁰C | 93⁰C | 204⁰C | 316⁰C | 427⁰C | 538⁰C | 593⁰C | 649⁰C | 704⁰C | 760⁰C | 816⁰C | 871⁰C | 927⁰C | 982⁰C | 1038⁰C | 1093⁰C |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Minimum Creep 0.0001% per hr (Ksi) | - | - | - | - | - | - | 18.0 | 11.6 | 7.7 | 5.0 | 3.35 | 2.3 | 1.5 | 0.89 | 0.49 | - |
| - | - | - | - | - | - | 12.0 | 8.2 | 5.7 | 3.8 | 2.55 | 1.75 | 1.15 | 0.55 | - | - | |
| - | - | - | - | - | - | 32.0 | 23.0 | 16.0 | 9.2 | 6.6 | 4.4 | 2.8 | 1.85 | 1.35 | 1.03 | |
| - | - | - | - | - | - | 22.0 | 14.0 | 8.5 | 5.2 | 3.75 | 2.5 | 1.65 | 1.15 | 0.86 | 0.68 | |
| - | - | - | - | - | - | 15.0 | 8.7 | 4.6 | 2.9 | 2.1 | 1.45 | 0.97 | 0.7 | - | - | |
| - | 16.31 | 16.81 | 17.26 | 17.66 | 17.95 | - | 18.25 | - | 18.54 | - | 18.9 | - | 19.44 | - | - | |
| 12.5 | - | 15 | - | 17.4 | - | - | 19.3 | - | 20.8 | - | - | - | 24.7 | - | - | |
| 2 | - | 1.85 | - | 1.68 | - | - | 1.5 | - | 1.39 | - | 1.29 | - | 1.21 | - | - |
| Mechanical Properties | 50⁰C | 100⁰C | 200⁰C | 300⁰C | 400⁰C | 500⁰C | 600⁰C | 700⁰C | 800⁰C | 850⁰C | 900⁰C |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength/ MPa | 663.3 | 621.9 | 577.8 | 568.1 | 549.5 | 522 | 475.7 | 386.1 | 388.9 | 254.4 | 171 |
| 0.2% Yield Strength / MPa | 304.8 | 271 | 222 | 202 | 200.6 | 173.1 | 166.9 | 158.6 | 148.2 | 100.7 | 80 |
| Reduction of area / % | 51 | 48 | 46 | 46 | 46 | 44 | 43 | 44 | - | - | - |
| Elongation / % | 68 | 65 | 65 | 64 | 60 | 62 | 63 | 58 | 76 | 88 | 92 |
Proud members of the British Valve & Actuator Association