The High Strength Heat Resistant Stainless Steel

253 MA was developed over 30 years ago when the need for a heat resistant stainless steel with high strength, while maintaining good oxidation resistance was present in the industry. The lean 11% nickel content of RA 253 MA is a key contributor to being cost effective and stable. With the addition of rare earth elements, RA 253 MA still performs well at temperatures up to 2000°F (1093°C), similar to that of 310 stainless steel.

Performance Profile

253 MA is a lean austenitic heat resistant alloy with high strength and outstanding oxidation resistance. It offers an excellent combination of creep strength along with excellent resistance to oxidation, sulfidation, and erosion at high temperatures in an alloy containing just 11% nickel. Because of its lean chemistry, RA 253 MA is very economical compared to most heat resistant alloys.

RA 253 MA obtains its heat resistant properties by tight control of micro alloy additions. The use of cerium in combination with silicon results in superior oxidation resistance to 2000°F (1093°C). Nitrogen, carbon, and cerium combine to provide creep rupture strength that is double that of type 310 and 309 stainless at 1600°F (871°C).

Inventory

253 MA Pipe, 253 MA Plate, 253 MA Round Bar, 253 MA Sheet, 253 MA Weld Wire

Common Trade Names

Specifications

Features

• Oxidation resistance to 2000°F (1093°C)
• Good resistance to sulfidation
• Superior strength at elevated temperatures
• Good resistance to high temperature abrasion

Applications

• Boiler Nozzles
• Corrugated Boxes
• Cyclones
• Bar Baskets
• Radiant Tubes

• 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