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ASTM A312 253MA Super Austenitic Stainless Steel Pipe 3/4 Inch to 48 inch Diameter STD
253MA contains fairly low nickel content, which gives it some advantage in reducing sulphide atmospheres when compared to high nickel alloys and to Grade 310. The inclusion of high silicon, nitrogen and cerium contents gives the steel good oxide stability, high elevated temperature strength and excellent resistance to sigma phase precipitation.
The austenitic structure gives this grade excellent toughness, even down to cryogenic temperatures. These properties are specified for flat rolled product (stainless steel plate, sheet and coil) as Grade S30815 in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications.
| Product Name | ASTM A312 UNS S30815 (253MA) Pipe and pipe fittings |
| Standard | ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Type | 1.4835 (UNS S30815 – 253MA – SS2368)Pipe |
| Materials | Stainless steel:ASTM/ASMES/A182 F304 | F304L |F304H | F316 | F316L | F321 | F321H | F347|316Ti | 309S |310S | href="https://www.bhpipe.com/405-Stainless-Steel-Tube-Pipe-Tubing.htm" 405 |409|410 | 410S | 416 | 420 | 430 | 630 | 660 | 254SMO | 253MA | 353MA Nickel Alloy: ASTM/ASME S/B366 UNS N08020 | N04400| N06600 | N06625 | N08800 |
N08810 | N08825 | N10276 | N10665 | N10675 | Incoloy 800 | Incoloy 800H | Incoloy 800HT | Incoloy 825 | Incoloy 901 | Incoloy 925 | Incoloy 926, Inconel 600 | Inconel 601 | Inconel 625 | Inconel 706 | Inconel 718 | Inconel X-750, Monel 400 | Monel 401 | Monel R 405 | Monel K 500 Hastelloy:HastelloyB | HastelloyB-2 | HastelloyB-3 | HastelloyC-4 | Hastelloy C-22 | Hastelloy C-276 | Hastelloy X |Hastelloy G | Hastelloy G3 Carbon steel: API 5L... |
| Marking | Supply Logo + Standard + Size(mm) + HEAT NO +or as your requirement |
| Test | Chemical Component Analysis, Mechanical Properties, Metallurgical Analysis, Impact Testing, Hardness testing , Ferrite Testing, Intergranular corrosion testing, X-ray Inspection (RT), PMI, PT, UT, HIC & SSC test, etc. or as your requirment |
| Certificates | API, ISO, SGS, BV, CE, PED, KOC, CCRC, PDO, CH2M HILL and etc. |
| Applications | Ø EN 1.4835 has a good weldability and can be welded using the following methods:
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| Advantages |
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Function
By using 1.4835 (UNS S30815 – 253MA – SS2368) you get a Stainless High Temperature Steel designed to be used at temperatures over 550°C. It has a good resistance to oxidation and suits to be used as details in ovens, construction and buildings.
The steel grade 1.4835 ( also called UNS S30815, 253MA and SS2368) is an austenitic stainless high temperature steel with good resistance to oxidation. The steel has been designed to be used at temperatures over 550°C, the most suitable temperature range is 850-1100°C. The steel suits for production of details with good resistance to temperature corrosion and relatively high strength at elevated temperatures. It also has good creep strength properties. 1.4835 is not magnetic but can be slightly magnetic after cold working or welding.
Good formability and weldability
1.4835 has a good weldability and can be welded with shielded metal
arc welding, gas tungsten arc welding, plasma arc welding and
submerged-arc welding. You shall use low heat input and use filler
metals of type EN 1.4835 when you weld. The steel can be both cold
and hot formed but it can only be hardened by cold working. The
steel has high hardness and at machining you need to follow cutting
recommendations.
Chemical Composition ranges for 253MA grade stainless steel
| Grade | C | Mn | Si | P | S | Cr | Ni | N | Ce | |
| 253MA | min. max. | 0.05 0.10 | - 0.80 | 1.10 2.00 | - 0.040 | - 0.030 | 20.0 22.0 | 10.0 12.0 | 0.14 0.20 | 0.03 0.08 |
Mechanical properties of 253MA grade stainless steel
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 253MA | 600 | 310 | 40 | 95 | 217 |
Physical properties of 253MA grade stainless steel
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (mm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nW.m) | |||
| 0-100°C | 0-600°C | 0-1000°C | at 20°C | at 1000°C | |||||
| 253MA | 7800 | 200 | 17.0 | 18.5 | 19.5 | 15.0 | 29.0 | 500 | 850 |
Grade specifications Comparison for 253MA grade stainless steel
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 253MA | S30815 | - | - | 1.4835 | X9CrNiSiNCe21-11-2 | 2368 | - |
| These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. | |||||||
Possible alternative grades to 253MA grade stainless steel
| Grade | Why it might be chosen instead of 253MA |
| 310 | Carburising atmospheres require a higher nickel content |
| 304H | Lower cost alternative, provided the operating temperature is below about 800°C |
| Nickel Alloys | Carburising atmospheres or temperatures above the 1100 - 1150°C maximum of 253MA. |
