| Type: | Stainless Steel Pipes |
|---|---|
| Standard: | ASTM, AISI |
| Grade: | 253mA S30815 |
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253MA is a grade combining excellent service properties at high temperatures with ease of fabrication. It resists oxidation at temperatures up to 1150°C and can provide superior service to Grade 310 in carbon, nitrogen and sulphur containing atmospheres.
Another proprietary designation covering this grade is 2111HTR.
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.
ASME SA 182, ASME SA 213, ASTM A 240, ASTM A 276, ASTM A 312, ASTM A 479, UNS S30815, Werkstoff 1.4835
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ASTM | JIS | AISI | EN |
| Grade | S30100 | SUS301 | 301 | 1.431 |
| S30400 | SUS304 | 304 | 1.4301 | |
| S30403 | - | 304L | 1.4307 | |
| S31008 | SUS310S | 310S | 1.4845 | |
| S31603 | - | 316L | 1.4404 | |
| S32100 | SUS321 | 321 | 1.4541 | |
| S41008 | SUS410S | 410S | - | |
| S43000 | SUS430 | 430 | 1.4016 | |
| S43932 | - | - | 1.451 | |
| S44400 | SUS444 | 444 | 1.4521 | |
| S44500 | SUS430J1L | - | - |
Width: 600mm~2030 mm
Thickness: 0.1~120.0 mm
Length: 300~6000 mm , Max 18000 mm
Surface Finish: No.1, 2B, BA, No.3, No.4, No.5, No.8, HL, Etching, SB, Ti-coating,color-coating ,embossing .
Typical applications include:
| ASTM A182 Grade FXM-19 | ASTM A269 Grade TPXM-19 | ASTM A580 Grade S20910 |
| ASTM A193 Grade B8R Class 1C | ASTM A276 Grade S20910 | ASTM A813 Grade TPXM-19 |
| ASTM A193 Grade B8R Class 1D | ASTM A312 Grade TPXM-19 | ASTM A814 Grade TPXM-19 |
| ASTM A193 Grade B8RA Class 1C | ASTM A314 Grade S20910 | ASTM A943 Grade TPXM-19 |
| ASTM A194 Grade 8R | ASTM A336 Grade FXM-19 | ASTM A959 Grade S20910 |
| ASTM A194 Grade 8RA | ASTM A358 Grade A240 XM-19 | ASTM A965 Grade FXM-19 |
| ASTM A213 Grade XM-19 | ASTM A403 Grade CRXM-19 | AISI XM-19 |
| ASTM A240 Grade S20910 | ASTM A403 Grade WPXM-19 | SAE XM-19 |
| ASTM A249 Grade TPXM-19 | ASTM A479 Grade S20910 | UNS S20910 |
These properties are specified for flat rolled product (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.
Typical compositional ranges for grade 253MA stainless steels are given in table 1.
| C | Mn | Si | P | S | Cr | Ni | N | Ce | |
| min. | 0.05 | - | 1.10 | - | - | 20.0 | 10.0 | 0.14 | 0.03 |
| max. | 0.10 | 0.80 | 2.00 | 0.040 | 0.030 | 22.0 | 12.0 | 0.20 | 0.08 |
Typical mechanical properties for grade 253MA stainless steels are given in table 2.
| Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | |||
| 600 | 310 | 40 | 95 | 217 |
Typical physical properties for grade 253MA stainless steels are given in table 3.
| 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 | ||||
| 7800 | 200 | 17.0 | 18.5 | 19.5 | 15.0 | 29.0 | 500 | 850 |
Approximate grade comparisons for 253MA stainless steels are given in table 4.
| UNS No | Old British | Euronorm |
Swedish SS |
Japanese JIS |
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| BS | En | No | Name | ||||
| 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 grade 253MA stainless steels are given in table 5.
| 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. |
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