International Standard Comparative

UNS numbering Systems.

Unified Numbering Systems for Metals and Alloys


The UNS for Metals and Alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of metals and alloys. Jointly developed by ASTM International and the Society of Automotive Engineers (SAE), it provides the uniformity necessary for efficient indexing, record keeping, data storage and retrieval, and cross-referencing.

UNS Number C GROUP : Copper and Copper Alloys

C10100~C11300 | C11400~C16200 | C16500~C37000 | C37700~C65100

C84400~C94400 | C94500~C99500

UNS Number F GROUP : Cast Irons

F10001~F24830 | F25530~F47003

UNS Number G GROUP : AISI and SAE Carbon and Alloy Steels

G10050~G10250 | G10260~G11080 | G11090~G15720 | G31400~G44270 | G45200~G51600

G51601~G92600 | G92620~G98500

UNS Number J GROUP : Cast Steel (Except Tool Steels)

J02002~J13512 | J13855~J92590 | J92600~J94650

UNS Number K GROUP : Miscellaneous Steels and Ferrous Alloys

K00040~K02300 | K02301~K03017 | K03046~K07000 | K07001~K11630 | K11646~K12238

K12244~K19667 | K19965~K32550 | K32723~K93120 | K93600~K95000

UNS Number N GROUP : Nickel and Nickel Alloys

N02200~N07080 | N07353~N08811 | N08825~N10665

UNS Number S GROUP : Heat and Corrosion Refractory Metals and Alloys

S13800~S30200 | S30215~S30909 | S30940~S31654 | S31700~S35000 | S35500~S43035


Comparative Table

UNS Number K GROUP : Heat and Corrosion Refractory Metals and Alloys - S13800~S30200
ASTM Brand/Trp
ASTM Equivalent
UNS S13800 Precipitation Hardenable Cr-Ni- PH 13-8 Mo ASTM A564 (XM-13), ASTM A693 (XM-13), ASTM A705 (XM-13)
  Al-Mo Stainless Steel    
UNS S15500 Precipitation Hardenable Cr-Ni- 15-5PH ASTM A564 (XM-12), ASTM A693 (XM-12), ASTM A705 (XM-12)
  Cu Stainless Steel    
UNS S15700 Precipitation Hardenable Cr-Ni- PH 15-7 Mo ASTM A564 (632), ASTM A579 (632), ASTM A693 (632), ASTM A705 (632)
  Mo-Al Stainless Steel    
UNS S16800 Cr-Ni-Mo Stainless Steel 16-8-2-H ASTM A376 (16-8-2-H), ASTM A430 (16-8-2-H)
UNS S17400 Precipitation Hardenable Cr-Ni- 17-4PH ASTM A564 (630), ASTM A693 (630), ASTM A705 (630)
  Cu Stainless Steel    
UNS S17600 Precipitation Hardenable Cr-Ni- Stainless W ASTM A564 (635), ASTM A693 (635), ASTM A705 (635)
  Al-Ti Stainless Steel    
UNS S17700 Precipitation Hardenable Cr-Ni- 17-7PH ASTM A313 (631), ASTM A564 (631), ASTM A579 (62), ASTM A693 (631),
  Stainless Steel   ASTM A705 (631)
UNS S18200 Free Machining Ferritic Cr-Mo   ASTM A581 (XM-34), ASTM A582 (XM-34)
  Stainless Steel    
UNS S20100 Austenitic Cr-Mn-Ni   ASTM A412 (201), ASTM A666 (201)
  Stainless Steel    
UNS S20161 Austenitic Cr-Mn-Ni-Si   ASTM A167, ASTM A240, ASTM A276, ASTM A314, ASTM A412, ASTM A479, ASTM A580
  Stainless Steel    
UNS S20200 Austenitic Cr-Mn-Ni   ASTM A314 (202), ASTM A412 (202), ASTM A473 (202), ASTM A66 (202)
  Stainless Steel    
UNS S20300 Austenitic Cr-Mn-Ni-Cu Free 203EZ ASTM A581 (XM-I), ASTM A582 (XM-1)
  Machining Stainless Steel    
UNS S20910 Austenitic Cr-Ni-Mn-Mo 22-13-5 ASTM A182 (XM-19), ASTM A240 (XM-19), ASTM A249 (XM-19),
  Stainless Steel   ASTM A269 (XM-19), ASTM A312 (XM-19), ASTM A403 (XM-19),
      ASTM A412 (XM-19), ASTM A479 (XM-19), ASTM A580 (XM-19)
UNS S21400 Austenitic Cr-Mn Stainless Steel Tenelon ASTM A240 (XM-3!)
UNS S21460 Austenitic Cr-Mn-Ni-Mo Cryogenic ASTM A412 (XM-14)
  Stainless Steel Tenelon  
UNS S21500 Austenitic Cr-Mn-Ni-Mo Esshete1250 ASTM A213
  Stainless Steel    
UNS S21600 Austenitic Cr-Mn-Ni-Mo 216 ASTM A240 (XM-17), ASTM A479 (XM-17), ASTM A492 (XM-17)
  Stainless Steel    
UNS S21603 Austenitic Cr-Mn-Ni-Mo 216L ASTM A240 (XM-18), ASTM A479 (XM-18), ASTM A492 (XM-18)
  Stainless Steel, Low Carbon    
UNS S21800 Austenitic Cr-Ni-Mn Nitronic 60 ASTM A193, ASTM A194, ASTM A276, ASTM A479, ASTM A555
  Stainless Steel    
UNS S21900 Austenitic Cr-Mn-Ni 21-6-9 ASTM A276 (XM_10), ASTM A314 (XM-10), ASTM A412 (XM-10),
  Stainless Steel   ASTM A473 (XM-10), ASTM A580 (XM-10)
UNS S21904 Austenitic Cr-Mn-Ni 21-6-9LC ASTM A276 (XM-11), ASTM A314 (XM-11), ASTM A412 (XM-11),
  Stainless Steel, Low Carbon   ASTM A580 (XM-11)
UNS S24000 Austenitic Cr-Mn-Ni 18-4Mn ASTM A240 (XM-29), ASTM A249 (XM-29), ASTM A269 (XM-29),
  Stainless Steel   ASTM A312 (XM-29), ASTM A412 (XM-29), ASTM A688 (XM-29)
UNS S24100 Austenitic Cr-Mn-Ni 18-2Mn ASTM A580 (XM-28)
  Stainless Steel    
UNS S28200 Austenitic Cr-Mn-Cu-Mo 18-18-Plus ASTM A276, ASTM A314, ASTM A473, ASTM A493, ASTM A580
  Stainless Steel    
UNS S30100 Austenitic Cr-Ni Stainless Steel 301 ASTM A197 (301), ASTM A177 (301), ASTM A554 (301), ASTM A666 (301)
UNS S30200 Austenitic Cr-Ni Stainless Steel 302 ASTM A167 (302), ASTM A240 (302), ASTM A276 (302), ASTM A313 (302),
      ASTM A314 (302), ASTM A368 (302), ASTM A473 (302), ASTM A478 (302),
      ASTM A479 (302), ASTM A492 (302), ASTM A493 (302), ASTM A511 (302),
      ASTM A554 (302), ASTM A666 (302)
Register as a member of e-pipe Registration your Company Information.

Any more you don't have to wait Marketing Result.
Using our companies information management database - Open e'market. and Advertising,Operating activities.
With e-pipe, Make a New Business.