Stainless Steel Bar Specifications
UNS = Unified Numbering System
TYPE = Commonly used grade name
AMS = Aerospace Society for Testing and Materials
ASTM = American Society for Testing and Materials
FEDERAL = Federal specifications
| UNS | TYPE | AMS | ASTM | FEDERAL | CHARACTERISTICS | STOCK CHECK |
|---|---|---|---|---|---|---|
| S13800 | 13-8 PH | 5629 | A-564 | – | Excellent transverse properties, has superior strength and toughness. | Contact Us |
| S15500 | 15 – 5 PH® | 5658 5659 |
A-564 | – | 15 – 5 PH® is similar to 17-4 PH but superior transverse ductility and toughess. | Contact Us |
| S15700 | 15-7 PH | 5657 | A-564 | – | Similar to 17-7 PH but with higher strength. | Contact Us |
| S17400 | 17-4 PH | 5622 5643 |
A-564 | – | Combines excellent corrosion resistance, high strength/hardness, low temperature hardening and good fabricating characteristics. | Contact Us |
| S20910 | XM-19 | 5764 | A-276 A-314 A-479 |
– | Nitrogen strengthened austenitic steel, good corrosion resistance with improved mechanical properties. XM-19 is about twice the yield strength of 316. | Contact Us |
| S21800 | 21800 | 5848 | A-276
A-314 |
– | Similar to XM-19, but with lower physicals. | Contact Us |
| S30200 | 302 | 5636 5637 |
A-276
A-314 |
QQ-S-763 | Basic, general purpose stainless with good corrosion resistance and mechanical properties. 302 can be work hardened to achieve a higher tensile strength. | Contact Us |
| S30125 | 302B | – | A-276
A-314 |
– | Similar to type 302, but the addition of silicon improves resistance to oxidation. 302 “B” is a work hardened condition of 302 for increased strength. | Contact Us |
| S30300 | 303 | 5640 | A-314 A-582 |
– | Atmospheric corrosion resistance with improved mechanical properties. 303 is a 300 Grade with increased sulfur for good machinability. | Contact Us |
| S30400 | 304 | 5639 | A-276 A-479 A-493 |
QQ-S-763 | 304 is a low carbon content variation of 302, the difference is it minimizes carbide precipitation during welding. | Contact Us |
| S30400/ S30403 |
304/304L DUAL CERTIFIED |
5647 | A-276 A-314 A-479 |
QQ-S-763 | Extra low carbon content eliminates harmful carbide precipitation during welding, 304/304L is superior to 304 in resistance to intergranular corrosion after welding or stress relieving. | Contact Us |
| S30500 | 305 | – | A-276 A-314 A-493 |
QQ-S-763 | 305 has a low work hardening rate, good spinning, deep-drawing and cold-heading characteristics. | Contact Us |
| S30800 | 308 | – | A-276 A-314 |
– | The high chromium and nickel produce good heat and corrosion resistance. 308 is used widely for welding rod. | Contact Us |
| S30900 | 309 | – | A-276 A-314 |
QQ-S-763 | 309 has high strength and resistance to scaling at high temperatures. | Contact Us |
| S30908 | 309S | 5650 | A-276 A-314 A-479 |
– | Similar to 309 with a lowered carbon content to minimize carbide precipitation and improve weldability. 309S is commonly used for welding wire. | Contact Us |
| S31000 | 310 | – | A-276 A-314 |
QQ-S-763 | Higher alloy content improves basic characteristics, 310 is similar to 309 with even greater corrosion resistance and oxidation at high temperatures. | Contact Us |
| S31000/ S31008 |
310/310S | 5651 | A-276 A-314 A-479 |
– | Similar to 310, but with lower carbon content to minimize carbide precipitation and improve weldability, it is commonly used when welding wire. | Contact Us |
| S31254 | 254 SMO® | – | A-276 A-479 |
– | A very high end stainless steel strength is nearly twice that of 300 series stainless steels. | Contact Us |
| S31400 | 314 | 5652 | A-276 A-314 |
– | 314 contains increased silicon to further improve scaling resistance. | Contact Us |
| S31600 | 316 | 5648 | A-276 A-314 A-479 |
QQ-S-763 | Molybdenum improves general corrosion resistance as well as superior resistance to many types of chemical corrosives, pitting and superior creep strength at elevated temperatures. | Contact Us |
| S31600/ S31603 |
316/316L DUAL CERTIFIED |
5648 5653 |
A-276 A-314 A-479 |
QQ-S-763 | 316/316L Dual Certified is an extra low carbon version of 316, eliminating harmful carbide precipitation during welding. Also has superior resistance to intergranular corrosion after welding of stress relieving. | Contact Us |
| S31700 | 317 | – | A-276 A-314 |
QQ-S-763 | 317 contains a higher alloy content improving basic advantages of 316. | Contact Us |
| S31700/ S31703 |
317/317L DUAL CERTIFIED |
– | A-479 A-276 |
– | 317/317L Dual Certified is an extra low carbon variation of 317, ideal for welded structures. | Contact Us |
| S31803/ S32205 |
DUPLEX | – – |
A-276 A-479 |
– | Roughly double the strength of standard austenitic stainless steels, designed to improve resistance in many applications, such as chloride environments and sulfide stress corrosion. | Contact Us |
| S32100 | 321 | 5645 | A-276 A-314 A-479 |
QQ-S-763 | 321 is a titanium stabilized 300 Grade to permit use in approximately 800° F to approximately 1500° F range, without harmful carbide precipitation. 321 is subject to intergranular corrosion. | Contact Us |
| S32750 | SUPER DUPLEX | – | A-479 | – | Higher chromium and nitrogen content in Super Duplex makes it superior in corrosion resistance and enables a longer lifespan than Duplex. | Contact Us |
| S34700 | 347 | 5646
5654 |
A-276 A-314 A-479 |
QQ-S-763 | 347 is overall superior to 321, but with similar characteristics. 347 is stabilized by cobalt and tantalum, easily welded, resists intergranular corrosion. | Contact Us |
| UNS | TYPE | AMS | ASTM | FEDERAL | CHARACTERISTICS | STOCK CHECK |
|---|---|---|---|---|---|---|
| S34723 | 347F Se | 5642 | – | – | Free-machining variation of 347. | Contact Us |
| S34800 | 348 | – | A-276 A-314 A-479 |
– | 348 is similar to 347, the difference is tantalum is reduced in 348. | Contact Us |
| S40300 | 403 | – | A-276
A-314 |
QQ-S-763 | 403 is a special high quality variation of 410, but it has a lower silicon content which results in tighter control on composition and manufacturing. 403 is used for highly stressed parts. | Contact Us |
| S41000 | 410 | 5613 | A-276 A-314 A-479 |
QQ-S-763 | 410 is a low cost general purpose stainless steel, that hardens at 35-39 RC and is used widely where corrosion is not severe. | Contact Us |
| S41400 | 414 | 5615 | A-276 A-314 A-479 |
QQ-S-763 | 414 is similar to 410, but with somewhat better corrosion resistance and mechanical properties. | Contact Us |
| S41600 | 416 | 5610 | A-314 A-582 |
QQ-S-763 | Corrosion resistance with rapid, free machinability, heat treatment to 35 RC min. 416 Heat Treat is pre-heat treated. | Contact Us |
| S42000 | 420 | 5621 | A-276
A-314 |
QQ-S-763 | 420 is similar to 400, but the raised carbon content produces higher strength and hardness. Heat treatment to 50 RC min. | Contact Us |
| S42020 | 420F | 5620 | A-582 | – | Free-machining variation of 420. | Contact Us |
| S42023 | 420F Se | 5620 | A-582 | – | Similar to 420F, commonly used for forging. | Contact Us |
| S42200 | 422 | 5655 | A-565 | – | 422 is a high strength alloy with excellent creep/rupture qualities at high temperatures. It also has good heat treat qualities at varying hardnesses. | Contact Us |
| S43000 | 430 | 5627 | A-276 A-314 A-479 |
QQ-S-763 | 430 is the most popular of the chromium types, it combines good heat resistance and mechanical properties. | Contact Us |
| S43020 | 430F | – | A-314 A-582 |
– | 430F provides corrosion resistance in some applications, also often used for decorative purposes. | Contact Us |
| S43100 | 431 | 5628 | A-276 A-314 A-493 |
– | 431 has among the best corrosion resistance of the standard hardenable chromium types, with high mechanical properties after heat treatment. | Contact Us |
| S44002 | 440A | 5631 | A-276 A-314 |
QQ-S-763 | 440 A, B, and C all have the same basic composition with varying high carbon contents. This produces higher strength/hardness with 440 versions. Corrosion resistant only in the hardened condition | Contact Us |
| S44003 | 440B | – | A-276
A-314 |
QQ-S-763 | Contact Us | |
| S44004 | 440C | 5618 5630 5880 |
A-276 A-314 A-493 |
QQ-S-763 | Contact Us | |
| S44020 | 440F | 5632 | A-582 | – | Free-machining version of 440. | Contact Us |
| S44023 | 440F Se | – | A-582 | – | Free-machining version of 440, with a higher selenium content allowing easy chip breakage and acts as a lubricant during machining. | Contact Us |
| S44600 | 446 | – | A-276 A-314 |
QQ-S-763 | Good corrosion resistance with low coefficient of expansion. | Contact Us |
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