International Standard Comparative

UNS umbering Systems.

British Standards Institution :: 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 : Miscellaneous Steels and Ferrous Alloys - K32723~K93120
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS K32723 Alloy Steel   ASTM A469 (4)
UNS K32800 Alloy Steel   ASTM A471 (1-9)
UNS K33125 Alloy Steel   ASTM A469 (5)
UNS K33585 Alloy Steel   ASTM A336 (F32)
UNS K34035 Alloy Steel   ASTM A723 (2)
UNS K41245 Alloy Steel   ASTM A213 (T5c), ASTM A335 (P5c)
UNS K41545 Alloy Steel   ASTM A199 (T5), ASTM A200 (T5), ASTM A213 (T5), ASTM A234 (WP5),
UNS K41583 Alloy Steel   ASTM A335 (P%), ASTM A336 (F5), ASTM A369 (FP5), ASTM A387 (5)
UNS K42247 Alloy Steel   ASTM A645 / ASTM A645M
UNS K42338 Alloy Steel   ASTM A707 (LB)
UNS K42339 Alloy Steel   ASTM A543 / ASTM A543M (ASTM A)
UNS K42343 Alloy Steel   ASTM A543 / ASTM A543M (B)
UNS K42348 Alloy Steel   ASTM A541 (7, 7ASTM A, 7B)
UNS K42365 Alloy Steel   ASTM A541 (8, 8ASTM A)
UNS K42544 Alloy Steel   ASTM A508 (5, 5ASTM A)
UNS K42598 Alloy Steel   ASTM A182 (F5ASTM A), ASTM A336 (F5ASTM A)
UNS K42885 Alloy Steel   ASTM A579 (11)
      ASTM A469 (6, 7, 8), ASTM A470 (5, 6, 7)
       
UNS K44045 Alloy Steel 300M ASTM A723 (3)
UNS K44220 Alloy Steel Krupp ASTM A579 (32)
UNS K51210 Alloy Steel HY30 ASTM A534 (Krupp)
UNS K51225 Alloy Steel   ASTM A579 (12)
UNS K51545 Alloy Steel   ASTM A213 (T5b), ASTM A335 (P5b)
UNS K51440 Nitriding Steel   ASTM A355 (C)
       
UNS K71340 Alloy Steel   ASTM A522 (II), ASTM A553 (II)
UNS K81340 Alloy Steel   ASTM A333 (8), ASTM A334 (8), ASTM A353, ASTM A522 (I), ASTM A553M (I)
UNS K90941 Alloy Steel HP9-4-25 ASTM A182 (F9), ASTM A234 (WP9), ASTM A369 (FP9)
UNS K91094 Alloy Steel. Superstrength HP-9-4-30 ASTM A579 (83)
UNS K91122 Alloy Steel. Superstrength   ASTM A579 (81)
UNS K91283 Alloy Steel. Superstrength   ASTM A579 (82)
UNS K91352 Alloy Steel. Superstrength   ASTM A437 (B4B, B4C)
UNS K91401 Alloy Steel   ASTM A605 / ASTM A605M
UNS K91470 Iron Electrical Heating   B603 (IV)
  Element Alloy    
UNS K91555 Alloy Steel. Non-magnetic   ASTM A289 (A)
UNS K91670 Iron Electrical Heating   ASTM A603 (III)
  Element Alloy    
UNS K91800 Iron Chromium Sealing Alloy   ASTM A256 (I)
UNS K91870 Iron Electrical Heating   ASTM A603 (II A)
  Element Alloy    
UNS K91930 Alloy Steel. Superstrength   ASTM A579 (74)
UNS K91940 Alloy Steel. Superstrength   ASTM A579 (75)
UNS K91955 Alloy Steel. Non-magnetic   ASTM A289 (B)
UNS K92100 Iron. Thermostat. Alloy   ASTM B388
UNS K92350 Iron. Thermostat. Alloy   VB388
UNS K92400 Iron Electrical Heating   ASTM B603 (II B)
  Element Alloy    
UNS K92500 Iron Electrical Heating   ASTM B603 (I)
  Element Alloy    
UNS K92510 Iron. Thermostat. Alloy   ASTM B388
UNS K92801 Iron Chromium Sealing Alloy   ASTM F256 (II)
UNS K92810 Alloy Steel. Maraging   ASTM A538 / ASTM A538M (A)
UNS K92820 Alloy Steel. Superstrength   ASTM A579 (71)
UNS K92850 Iron. Thermostat. Alloy   ASTM B388
UNS K92890 Alloy Steel. Maraging   ASTM A538 / ASTM A538M (B)
UNS K92940 Alloy Steel. Superstrength   ASTM A579 (72)
UNS K93120 Alloy Steel. Maraging    
       
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