Plat Columbus 253 MA Stainless Datasheet

Characteristic Plat Columbus 253 MA

Plat Columbus 253 MA is an austenitic chromium-nickel steel alloyed with nitrogen and rare earth metals. The grade is characterized by:

• High creep strength
• Very good resistance to isothermal and, particularly, cyclic oxidation
• Good structural stability at high temperatures
• Good weldability
• Maximum operating temperature is approx. 1150°C (2100°F)

The high creep strength of Columbus 253 MA plate, coupled with its excellent oxidation resistance and its good resistance to carburization in constantly carburizing gas, makes it a very suitable material for end uses in which 18/8 steels lack the necessary resistance to oxidation and carburization.

 

Columbus 253 MA plate is often preferred instead of stainless chromium steels which have insufficient creep strength and structural stability. Furthermore, Columbus 253 MA plate can very well take the place of higher alloyed materials such as 25Cr/20Ni steels and Alloy 800H, or even Alloy 600 in certain cases.

Standards

• UNS: S30815
• EN Number: 1.4835
• W.Nr.: (1.4893)*/(1.4828 mod.)*
• SS: 2368*
• ASTM A213, A312
• EN 10297-2
• SS 14 23 68*
• * Obsolete. Replaced by EN.

Approvals
Approved for use in ASME Boiler and Pressure Vessel Code, Section I, III and VIII, Div. 1 (SA-182, SA-213, SA-240, SA-249 SA-312 and SA-479)

C	Si	Mn	P	S	Cr	Ni	N	Ce*
0.08	1.6	≤0.8	≤0.040	≤0.030	21	11	0.17	0.05

* To cerium should be added the quantity of other rare earth metals, since the the additive takes the form of misch metal containing about 50% Ce.

Application Columbus 253 MA

Columbus 253 MA Plate has come to be used extensively in the metallurgical, petrochemical and power industries. Typical applications are:

• Tubes in waste heat recovery systems in the metallurgical industry, e.g. recuperators
• Tubes in heat treatment furnaces, e.g. radiation tubes, thermocouple protection tubes, burner components, furnace rollers
• Tubes for injection of pulverized coal in blast furnaces
• Tubing for fluidized-bed combustion plants
• Furnace tubes for mud incineration plants
• Tubes for carbon black process gas coolers/air heaters
• Tubes for the glass and cement industries
• Styrene reactor tubes
• EDC cracking tubes
• Convection tubes in ethylene cracking
• Air preheater tubes in sulphuric acid gas converters
• Muffle tubes in continuous wire annealing furnaces