AUSTENITIC STANDARD GRADES
70% of all stainless steel production accounts for this group. 300-series among this group is the most popular type of stainless steel. Austenitic stainless steels are the most weldable and corrosion resistant group due to their high chromium and nickel content. 200-series in this group have manganese substituted for some of the nickel as a cost-saving measure.
| GRADE |
DIN NO |
EQUIVALENT |
| 201 |
1.4372 |
X12CrMnNiN17-7-5 |
| 202 |
1.4373 |
X12CrMnNiN18-9-5 |
| 204Cu |
1.4597 |
X9CrMnCuNB17-8-3 |
| 301 |
1.4307 / 1.4310 |
X10CrNi18-8 |
| 301LN |
1.4318 |
X2CrNiN18-7 |
| 303 |
1.4305 |
X10CrNiS18-9 |
| 304 |
1.4301 |
X5CrNi18-10 |
| 304L |
1.4306 / 1.4307 |
X2CrNi18-9 / X2CrNi19-11 |
| 304N |
1.4315 |
X5CrNiN19-9 |
| 304LN |
1.4311 |
X2CrNiN18-10 |
| 304H |
1.4948 |
X6CrNi18-10 |
| 309 / 309S |
1.4828 / 1.4833 |
X12CrNi23-13 |
| 310 |
1.4810 |
X15CrNi25-20 |
| 310S |
1.4845 |
X8CrNi25-21 |
| 314 |
1.4841 |
X15CrNiSi2520 |
| 316 |
1.4401 / 1.4404 |
X5CrNiMo17122 / X2CrNiMo17122 |
| 316L |
1.4436 / 1.4432 |
X2CrNiMo17-12-3 / X2CrNiMo18-14-3 |
| 316LN |
1.4406/1.4429 |
X2CrNiMoN17-3-3 |
| 316Ti |
1.4571 |
X6CrNiMoTi17-12-2 |
| 317LN |
1.4434 |
X2CrNiMoN18-12-4 |
| 317L |
1.4438 |
X2CrNiMo18-15-4 |
| 321 |
1.4541 |
X6CrNiTi18-10 |
| 321H |
1.4878 |
X8CrNiTi18-10 |
| 347 |
1.4550 |
X6CrNiNb18-10 |
| 347H |
1.4961 |
X8CrNiNb16-13 |
| 904L |
1.4539 |
X1NiCrMoCuN25-20-5 |
FERRITIC
These steels contain less than 0.10% carbon and are magnetic. As a group, they are more corrosion resistant than the martensitic grades, but generally inferior to the austenitic grades. These are chrome steels with no nickel. They have weak weldability but good formability. They are mainly used for decorative items, sinks, and exhaust systems.
| GRADE |
DIN NO |
EQUIVALENT |
| 3Cr12 |
1.4003 |
X2CrNi12 |
| 409 |
1.4512 |
X2CrTi12 |
| 410S |
1.4000 |
X6Cr13 |
| 430 |
1.4016 |
X6Cr17 |
| 430F |
1.4019 / 1.4104 |
X14CrS17 |
| 439 |
1.4510 |
X3CrTi17 |
| 441 |
1.4509 |
X2CrTiNb18 |
| 444 |
1.4521 |
X2CrMoTi18-2 |
MARTENSITIC
This group of stainless steels is similar to the ferritic group, but has higher level of carbon enabling them to be tempered and hardened. They are highly useful in situations where strength is more important than corrosion resistance. They don't contain nickel and are magnetic. Weldable martensitics usually require preheating and post-weld heat treatment. They are used in steam and gas turbines in petrochemical industry, cutting utensils, surgical instruments, fasteners, ball bearings and press plates.
| GRADE |
DIN NO |
EQUIVALENT |
| 410 |
1.4006 |
X12Cr13 |
| 420 |
1.4021 |
X20Cr13 |
| 440 A B C |
1.4023 / 1.4041 / 1.4040 |
X110Cr17 / X85Cr17 / X68Cr17 |
| 422 |
1.4929 |
X23CrMoWMnNiV12-1-1 |
HEAT RESISTANT
| GRADE |
DIN NO |
EQUIVALENT |
|
1.4713 |
X10CrAlSi7 |
|
1.4724 |
X10CrAlSi13 |
|
1.4742 |
X10CrAlSi18 |
| 446 |
1.4749 |
X18CrN28 |
|
1.4762 |
X10CrAlSi25 |
|
1.4828 |
X15CrNiSi20-12 |
| 309S |
1.4833 |
X12CrNi23-13 |
| 253MA |
1.4835 |
X9CrNiSiNCe21-11-2 |
| 314 |
1.4841 |
X15CrNiSi25-21 |
| 310S |
1.4845 |
X8CrNi25-21 |
|
1.4876 |
X10NiCrAlTi32-21 |
| 321 |
1.4878 |
X8CrNiTi18-10 |
| 304H |
1.4948 |
|
|
2.4816 |
ALLOY 600 |
PRECIPITATION HARDENING
With the addition of elements such as Aluminum, Copper and Niobium that allow them to be hardened by a solution and aging heat treatment, these steels become extremely strong. They offer a unique combination of fabricability, strength, ease of heat treatment, and corrosion resistance. Although they are primarily developed as aerospace materials, they are also used in commercial applications like manufacture of rings, chains,
| GRADE |
DIN NO |
EQUIVALENT |
| 17-4 |
1.4713 |
X10CrAlSi7 |
| 15-5 |
1.4749 |
X18CrN28 |
| 17-7 |
1.4724 |
X10CrAlSi13 |
|
1.4422 |
X1CrNiMoCu12-5-2 |
|
1.4423 |
X1CrNiMoCu12-7-3 |
| 17-4PH |
1.4542 |
X5CrNiCuNb16-4 |
| 17-7PH |
1.4568 |
X7CrNiAl17-7 |
| 15-7 mo |
1.4742 |
X10CrAlSi18 |
DUPLEX
Duplex steels are a combination of ferritic and austenitic steels allowing savings in material costs. Ferrite and austenite content is approximately equal. They have higher yield strength and greater stress corrosion cracking resistance to chloride than austenites. Primary areas of use are chemical plants and piping applications.
| GRADE |
DIN NO |
EQUIVALENT |
| Nitronic 19D |
|
|
| 2205 |
1.4462 |
318LN |
| 2304 |
1.4362 |
|
| 4501 |
1.4501 |
|
| 2507 |
1.4410 |
|