What is the AISI equivalent of 1.4835?
Stainless steel AISI 253MA (1.4835, X9CrNiSiNCe21-11-2) is a heat-resistant austenitic chromium-nickel steel that is essentially the same as material 1.4828 / AISI 309. However, it differs from this in that it has a higher nitrogen content and the addition of rare earths (cerium) as an alloying constituent.
What is MA 253 material?
Stainless 253 MA is a lean austenitic heat resistant alloy with high strength and outstanding oxidation resistance. 253 MA maintains its heat resistant properties by advanced control of micro alloy additions. The use of rare earth metals in combination with silicon gives superior oxidation resistance up to 2000°F.
Properties and chemical composition of stainless steel AISI 253MA
|
C |
Si |
Mn |
P |
S |
N |
Cr |
N |
Mo |
Ni |
Ti |
|---|---|---|---|---|---|---|---|---|---|---|
|
0,05 – 0,12 |
1,40 – 2,50 |
≤ 1,00 |
≤ 0,045 |
≤ 0,015 |
0,12 – 0,20 |
20,0 – 22,0 |
0,12 – 0,20 |
- |
10,0 – 12,0 |
- |
Physical properties
Magnetisability: none
Density (kg/dm³): 7.8
Thermal conductivity (at up to 20°C): 15
Electronic resistance at room temperature (in Ω mm²/m): 0.85
Mechanical properties
Yield strength Rp0.2 MPa min.: 310
Tensile strength Rm MPa: 650-850
Elongation at break A80 % min.: 37
Welding
The material 1.4835 has good welding properties and can be used with all common welding processes such as arc welding, metal inert gas welding (MIG welding) or tungsten inert gas welding (TIG welding). Preheating and post-weld heat treatment are not normally required.
Heat resistance
Stainless steel AISI 253 MA / 1.4835 is a steel grade designed for heat resistance, which is specially intended for high-temperature applications. Heat resistance is given up to approx. 1150 °C. The material also has good scale resistance, which is given in air up to 1100 °C, but decreases from around 900 °C.
What is the difference between 253MA and 316 stainless steel?
The micro alloy addition of cerium as well as silicon gives RA 253 MA good oxidation resistance up to 2000°F. 304 and 316 stainless steels are only oxidation resistant to 1600°F. RA 253 MA is ASME section VIII, Div 1 approved for pressure vessels up to 1650°F, while 304 and 316 are only approved up to 1500°F.
What is the difference between 253MA and 310s stainless steel?
253MA is a high-performance heat-resistant alloy with superior creep strength and cyclic thermal resistance, achieved through micro-alloying with cerium, silicon, and nitrogen, making it ideal for applications with frequent heating and cooling or in sulfur-rich environments. In contrast, 310S is a more conventional, lower-carbon heat-resistant alloy with excellent high-temperature oxidation resistance due to its high chromium and nickel content, but with lower creep strength and less resistance to cyclic thermal stress compared to 253MA.