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 : Miscellaneous Steels and Ferrous Alloys - K19965~K32550
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
K19965 Alloy Steel(Bearing Steel)   ASTM A485 (3)
K19990 Alloy Steel(Bearing Steel)   ASTM A485 (4)
       
K20622 Alloy Steel   ASTM A710 (B)
K20747 Alloy Steel   ASTM A710 (ASTM A), ASTM A736
K20902 Alloy Steel   ASTM A707 (L6)
K20934 Alloy Steel   ASTM A707 (L5)
K21205 Alloy Steel   ASTM A734 / ASTM A734M (A)
K21390 Alloy Steel   ASTM A739 (B22)
K21509 Alloy Steel   ASTM A199 (T3c), ASTM A200 (T3c), ASTM A213 (T3c), ASTM A369 (FP3b)
K21590 Alloy Steel   ASTM A182 (F22), ASTM A199 (T22), ASTM A200 (T22), ASTM A213 (T22),
      ASTM A234 (WP22), ASTM A335 (P22), ASTM A336 (F22, F22ASTM A),
      ASTM A369 (FP22), ASTM A387 (22), ASTM A541 (6, 6ASTM A), ASTM A542
K21604 Alloy Steel   ASTM A514 (E), ASTM A517 (E)
K21650 Alloy Steel   ASTM A514 (P), ASTM A517 (P)
K21703 Alloy Steel   ASTM A203 / ASTM A203M (A)
K21903 Alloy Steel   ASTM A333 (7), ASTM A334 (7)
K22035 Alloy Steel   ASTM A32 (FR), ASTM A234 (WPR), ASTM A333 (9), ASTM A334 (9),
      ASTM A714 (V)
K22036 Alloy Steel   ASTM A350 (LF9)
K22103 Alloy Steel   ASTM A203 / ASTM A203M (B)
K22375 Alloy Steel   ASTM A508 (4, 4A, 4b)
K22573 Alloy Steel   ASTM A469 (2)
K22578 Alloy Steel   ASTM A470 (2)
K22773 Alloy Steel   ASTM A469 (3)
K22878 Alloy Steel   ASTM A470 (3, 4)
       
K23010 Alloy Steel   ASTM A470 (8)
K23205 Alloy Steel   ASTM A471 (10)
K23477 Alloy Steel   ASTM A579 (21)
K23510 Alloy Steel   ASTM A355 (D)
K23545 Alloy Steel   ASTM A336 (F31)
K23550 Alloy Steel   ASTM A723 (1)
K23745 Nitriding Steel   ASTM A355 (B)
       
K24040 Alloy Steel   ASTM A649 (1B)
K24045 Alloy Steel   ASTM A290 (G, H, I, J, K, L)
K24055 Alloy Steel   ASTM A372 (7)
K24064 Alloy Steel   ASTM A540 (B24)
K24065 Alloy Steel   ASTM A355 (A), ASTM A519 (E7140)
K24070 Nitriding Steel   ASTM A540 (B24V), ASTM A579 (22)
K24245 Alloy Steel   ASTM A291 (4 to 7)
K24562 Alloy Steel   ASTM A288 (4, 5, 6, 7, 8)
       
K24728 Alloy Steel D-6 ASTM A355 (ASTM A), ASTM A579 (23)
K31509 Alloy Steel   ASTM A199 (T4), ASTM A200 (T4)
K31545 Alloy Steel   ASTM A182 (F21), ASTM A199 (T21), ASTM A200 (T21), ASTM A213 (T21),
      ASTM A355 (P21), ASTM A336 (F21, F21), ASTM A369 (FP21), ASTM A387 (21)
K31718 Alloy Steel   ASTM A203 / ASTM A203M (D)
K31820 Alloy Steel HY80 ASTM A372 (6)
K31830 Alloy Steel   ASTM A182 / ASTM A182M
K31918 Alloy Steel   ASTM A333 (3), ASTM A334 (3)
K32018 Alloy Steel   ASTM A203 / ASTM A203M (E)
K32025 Alloy Steel   ASTM A350 (LF3)
K32026 Alloy Steel   ASTM A765 (III)
K32218 Alloy Steel   ASTM A707 (L7)
K32550 Alloy Steel   ASTM A579 (31)
       
       
       
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