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UNS S30815 (253MA) is an austenitic chromium-nickel steel alloyed with nitrogen and rare earth produce superior service to TP310,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).A wide variety of components requiring high strength at elevated temperatures.

It's classical Features:
Austentic micro structure
High mechanical strength at elevated temperature
Good structural stability at high temperatures
High resistance to oxidation,high temperature  corrosion and creeps    
Good ductility and weldability                                       





Heat treatment    
Tubes are delivered in the heat treated condition.the following procedure is recommended:
Stress relieving
850-950°C (1560-1740°F), 10-15 min.,Rapid cooling in air
Solution annealing
1050-1150°C (1920-2100°F), 5-20 min., rapid cooling in water                

UNS S30815 253MA 1.4835 High Strength Heat Resistant Stainless Steel Pipe or Tube

ASTM A213, A249,A269, A358,A312, A511, A554, A789, A790, A376, EN 10216-5, EN 10297, EN 10217, EN 10296,DIN 17456, DIN 17458,JISG3459, JIS GS3463, GS3467, JIS G3448, GOST 9940, GOST 9941,

Material: UNS S30815 253Ma 1.4835 

Nominal Dia: 1/2 "to 24" NB for seamless pipe, 3/8" to 40" NB for welded pipe
Schedules: 5S, 10S, 40S, 80S, 10, 20, 30...120, 140, 160, XXS
All dimensions are in accordance with ANSI B36.19 and ANSI B36.10
Size Range for tubing: OD:1/4" (6.35mm) to 8" (203mm), WT 0.02" (0.5mm) to 0.5"(12mm)

15m(Max) or as your requirement

Cold drawn, Cold rolled, Precision Rolled for Seamless Pipe or Tube
Gas tungsten arc welding, Plasma arc welding (PAW),Submerged arc welding (SAW) For Welded Pipe or Tube

Finish: Annealed & pickled, Bright annealing, polished

Ends: Beveled or plain end, square cut, burr free ,Plastic Cap at Both end

Packing: Bare packing/bundle packing with woven bag/wooden or steel frame crate packing/plastic cap protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test Procedure
1.100% PMI,Spectro Chemical Aanlysis Test for Raw Material
2.100% Dimension & Visual Examination
3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test
4.100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test  (ET or UT)
5.Radiographic Test for Welded Pipe (shall be accordance with specification,or shall be as agreed upon between the purchaser and vendor)
6.Straightness Test  (optional)
7.Roughness Test (optional)
8.Intergranular Corrosion Test(optional)
9.Impact Test (optional)
10.Grain Size Determinations (optional)

•Waste heat recovery systems in the metallurgical industry, e.g. recuperators
•Heat treatment furnaces, e.g. thermocouple protection tubes, burner components, furnace rollers

•Injection of pulverized coal in blast furnaces
•Fluidized-bed combustion plants
•Furnace tubes for mud incineration plants
•Carbon black process gas coolers
•The glass and cement industries
•Styrene reactor tubes
•Convection tubes in ethylene cracking    
•Air preheater tubes in sulphuric acid gas convertersTubes in waste heat recovery systems in the metallurgical industry, e.g. recuperators            

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