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 - K12244~K19667
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS K12244 Alloy Steel   ASTM A502 (3B)
UNS K12249 Alloy Steel   ASTM A690
UNS K12254 Alloy Steel   ASTM A325 (E), ASTM A563 (C3E)
UNS K12320 Alloy Steel   ASTM A204 / ASTM A204M (C)
UNS K12437 High-Strenght Low-Alloy Steel   ASTM A537 / ASTM A537M
UNS K12447 Carbon-Manganese-Silicon Steel   ASTM A738 / ASTM A738M
UNS K12510 Alloy Steel   ASTM A707 (L3)
UNS K12520 Alloy Steel   ASTM A336 (F1)
UNS K12521 Alloy Steel   ASTM A387 / ASTM A387M (12)
UNS K12524 Alloy Steel   ASTM A387 / ASTM A387M (11)
UNS K12529 Alloy Steel   ASTM A739 (B11)
UNS K12539 Alloy Steel    
UNS K12542 Alloy Steel   ASTM A541 (4)
UNS K12554 Alloy Steel   ASTM A225 / ASTM A225M
       
UNS K12608 Alloy Steel   ASTM A204 / ASTM A255M (A)
UNS K12609 High-Strenght Low-Alloy Steel   ASTM A724 / ASTM A724M (A)
UNS K12700 High-Strenght Low-Alloy Steel   ASTM A714 (VI)
UNS K12709 High-Strenght Low-Alloy Steel    
UNS K12765 Alloy Steel   ASTM A131 (AH32, DH32, EH32)
UNS K12766 Alloy Steel   ASTM A514 (N)
UNS K12821 Alloy Steel   ASTM A131 (AH36, DH36, EH36)
UNS K12822 Alloy Steel   ASTM A514 (A), ASTM A517 (A), ASTM A592 (A)
       
UNS K13047 Alloy Steel   ASTM A325 (2)
UNS K13049 Alloy Steel    
UNS K13050 Alloy Steel   ASTM A579 (13)
UNS K13051 Alloy Steel, Superstrength   ASTM A508 (1)
UNS K13502 Alloy Steel   ASTM A687 (I)
UNS K13521 Alloy Steel   ASTM A242 (2)
UNS K13547 Alloy Steel   ASTM A372
UNS K13548 Alloy Steel   ASTM A372
UNS K13643 Alloy Steel   ASTM A325 (A), ASTM A563 (C3A)
UNS K13650 Alloy Steel   ASTM A563 (DH3)
       
UNS K14044 Alloy Steel   ASTM A687 (II)
UNS K14047 Alloy Steel   ASTM A646 (12)
UNS K14048 Alloy Steel   ASTM A290 (E, F)
UNS K14072 Alloy Steel   ASTM A193 (B16), ASTM A467 (B4D)
UNS K14073 Alloy Steel   ASTM A540 (B21)
UNS K14247 Alloy Steel   ASTM A649 (1ASTM A)
UNS K14248 Alloy Steel   ASTM A372 (5E, 8)
       
UNS K14358 Alloy Steel   ASTM A325 (B), ASTM A563 (C3B)
UNS K14394 Alloy Steel   ASTM A579 (33)
UNS K14501 Alloy Steel   ASTM A469 (1), ASTM A470 (1)
UNS K14507 Alloy Steel   ASTM A291 (3)
UNS K14508 Alloy Steel   ASTM A372 (4)
UNS K14510 Alloy Steel   ASTM A194 (4)
UNS K14520 Alloy Steel   ASTM A336 (F30)
UNS K14542 Alloy Steel   ASTM A288 (2, 3)
UNS K14557 Alloy Steel   ASTM A291 (3A)
       
UNS K15047 Alloy Steel   ASTM A232
UNS K15048 Alloy Steel   ASTM A231
UNS K15590 Alloy Steel   ASTM A401
UNS K19195 Alloy Steel(Bearing Steel)   ASTM A485 (2)
UNS K19667 Alloy Steel(Bearing Steel)   ASTM A485 (1)
       
       
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