International Standard Comparative

UNS umbering Systems.

Unified Numbering Systems for Metals and Alloys

50x50

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

S43036~S66545

Comparative Table

UNS Number K GROUP : Heat and Corrosion Refractory Metals and Alloys - S43036~S66545
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS S43036 Ferritic Cr Stainless Steel with 430 Ti ASTM A268 (430Ti), ASTM A554 (430Ti)
  Titanium    
UNS S43100 Ni Bearing Hardenable Cr 431 ASTM A276 (431), ASTM A314 (431), ASTM A473 (431), ASTM A493 (431),
  Stainless Steel   ASTM A579 (431), ASTM A580 (431)
UNS S44002 Hardenable Cr Stainleess Steel 440A 276 (440A), ASTM A314 (440A), ASTM A473 (440A), ASTM A511
      (440A), ASTM A580 (440A)
UNS S44003 Hardenable Cr Stainleess Steel 440B ASTM A276 (440B), ASTM A314 (440B), ASTM A473 (440B), ASTM A580
      (440B)
UNS S44004 Hardenable Cr Stainleess Steel 440C ASTM A276 (440C), ASTM A314 (440B), ASTM A473 (440C), ASTM A493
      (440C), ASTM A580 (440C)
UNS S44025 Hardenable Cr Stainleess Steel   ASTM A756
  with Mo    
UNS S44200 Cr Heat Resisting Steel 442 ASTM A176 (442)
UNS S44300 High Cr-Cu Heat Resisting Steel 443 ASTM A176 (443), ASTM A268 (443), ASTM A511 (443)
UNS S44400 Cr Heat Resisting Steel   ASTM A176, ASTM A240, ASTM A268, ASTM A276
  (Stabilized Low-Interstitial    
  Ferritic)    
UNS S44600 Cr Heat Stainless Steel 446 ASTM A176 (446), ASTM A268 (446), ASTM A276 (446), ASTM A314 (446),
      ASTM A473 (466), ASTM A511 (446), ASTM A580 (446)
UNS S44626 High Cr-Mo Stainless Steel 26-1 ASTM A176 (XM-33), ASTM A240 (XM-33), ASTM A268 (XM-33)
UNS S44627 Low Interstitial Ferritic Cr   ASTM A176, ASTM A240, ASTM A268, ASTM A314, ASTM A479, ASTM A731
  Stainless Steel with Columbium    
UNS S44635 Ferritic Cr-Mo-Ni Stainless Steel 25-4-4 ASTM A176, ASTM A240, ASTM A268
UNS S44660 Ferritic Cr-Mo-Ni Stainless Steel SC-1 ASTM A176, ASTM A240, ASTM A268
  Columbium plus Titanium    
  Stabilized    
UNS S44700 Ferritic High Cr-Mo 29-4 ASTM A176, ASTM A240, ASTM A268, ASTM A276, ASTM A479
  Stainless Steel    
UNS S44735 Ferritic High Cr-Mo 29-4C ASTM A176, ASTM A240, ASTM A268, ASTM A511
  Stainless Steel    
UNS S44736 Ferritic High Cr-Mo 28-4C-CuC ASTM A268, ASTM A803
  Stainless Steel    
UNS S44800 Ferritic High Cr-Mo 29-4-2 ASTM A176, ASTM A240, ASTM A268, ASTM A276, ASTM A479
  Stainless Steel    
UNS S45500 Stainless Steel Custom455 ASTM A313 (XM-16), ASTM A564 (XM-16), ASTM A693 (XM-16),
      ASTM A705 (XM-16)
UNS S50100 Cr Heat Resisting Steel 501 ASTM A193 (501), ASTM A194 (501), ASTM A314 (501), ASTM A387 (5),
      ASTM A473 (501)ZZ
UNS S50200 Cr Heat Resisting Steel 502 ASTM A199, ASTM A200, ASTM A213, ASTM A314, (502), ASTM A335, ASTM A387 (5),
      ASTM A473 (502)
UNS S50300 Cr Heat Resisting Steel   ASTM A182 (F7), ASTM A199 (T7), ASTM A200 (T7), ASTM A213 (T7),
      ASTM A335 (P7), ASTM A369 (FP7), ASTM A389 (Gr7), ASTM A473 (501ASTM A)
UNS S50400 Cr Heat Resisting Steel   ASTM A199 (T9), ASTM A200 (T9), ASTM A213 (T9), ASTM A276 (T9),
      ASTM A335 (P9), ASTM A387 (Gr9), ASTM A473 (501B)
       
UNS S63198 Iron Base Superalloy 19-9-DL ASTM A453 (651), ASTM A457 (651), ASTM A458 (651), ASTM A477 (651)
UNS S64152 High Strengh Alloy Steel M152 ASTM A565 (XM-32)
UNS S66220 Iron Base Superalloy Discaloy ASTM A453 (662), ASTM A638 (662)
UNS S66286 Iron Base Superalloy A286 ASTM A453 (660), ASTM A638 (660)
UNS S66545 Iron Base Superalloy W545 ASTM A453 (665)
       
       
       
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