Composition

Standard grades - Chemical composition % OSTP Name Typical Minimum Others EN ASTM SS DIN Stock standard C Cr Ni Mo Pipe, Fittings Hygenic 4301 0.04 17.0 8.5 -   1.4301 (304) 2333 1.4301 ISO/Metric    4307 0.02 18.0 8.0 -   1.4307 1.4301 304L (2352) 2333 (1.4306) ANSI/ISO/ Metric DIN/SMS/Imp 4541 0.04 17.0 9.0 - Ti 1.4541 321 2337 1.4541 ISO   4306 0.02 18.0 10.0 -   1.4306 304L 2352 1.4306       4401 0.04 16.5 10.0 2.0   1.4401 316 (2347) (1.4401)     4404 0.02 16.5 10.0 2.0   1.4404 316L (2348) (1.4404) ANSI DIN/SMS/Imp 4571 0.04 16.5 10.5 2.0 Ti 1.4571 316Ti 2350 1.4571 ISO/Metric     4436 0.04 16.5 10.5 2.5   1.4436 316 2343 (1.4436)     4432 0.02 16.5 10.5 2.5   1.4432 1.4436 316L 2343 (2353) (1.4435) ANSI/ISO/ Metric   4435 0.02 17.0 12.5 2.5   1.4435 316L 2353 1.4435       4438 0.02 18.0 13.0 3.0   1.4438 317L 2367 1.4438     The compositions comply with EN, which not always comply exactly with the old national standards. Old SS and DIN-designations within brackets specifiy a slightly higher Ni-content.   Wet corrosion resistant grades - Chemical composition % OSTP Duplex Typical EN ASTM SS DIN C Cr Ni Mo N Pipe, Fittings  2304 0.02 23.0 4.8 0.3 0.11 1.4362 S32304 2327 1.4362   2205 0.02 22.0 5.7 3.1 0.17 1.4462 S32205 2377 1.4462 ANSI SAF 2507 0.02 25.0 7.0 4.0 0.27 1.4410 S32750 2328 -   Austenitic 904 L 0.01 20.0 25.0 4.3 0.06 1.4539 N08904 2562 1.4539   254 SMO 0.01 20.0 18.0 6.1 0.20 1.4547 S31254 2378 - ANSI Heat and creep resistant grades - Chemical composition % OSTP Typical EN ASTM SS DIN C Cr Ni Si N 4948 0.05 18.1 8.3 - 0.06 1.4948 304H 2333 1.4948 4878 0.05 17.3 9.1 - 0.01 1.4878 321H 2337 1.4878 153 MA 0.05 18.5 9.5 1.3 0.15 1.4818 S30415 2372 -   253 MA 0.09 21.0 11.0 1.6 0.17 1.4835 S30815 2368 -   4828 0.04 20.0 12.0 2.0 0.04 1.4828 - - 1.4828 4833 0.06 22.3 12.6 - 0.08 1.4833 309S - 1.4833 4845 0.05 25.0 20.0 - 0.04 1.4845 310S 2361 1.4845 The non stocked grades are available as heat exchanger tubes in minimum quantities. For other types of tube and pipe the availibility is more limited and each inquiry will be evaluated individually.