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 G GROUP : AISI and SAE Carbon and Alloy Steels - G51601~G92600
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS G51601 Cr-B Alloy Steel   ASTM A322 (51B50), ASTM A331 (51B60),
      ASTM A519 (51B50)
UNS G51986 Cr Alloy Steel   ASTM A29 (E51100), ASTM A295 (E51100),
      ASTM A322 (E51100), ASTM A505 (E51100)
      ASTM A519 (E51100), ASTM A711
UNS G52986 Cr Alloy Steel   ASTM A29 (E52100), ASTM A295 (E52100),
      ASTM A331 (E52100), ASTM A505 (E52100),
      ASTM A519 (E52100), ASTM A535 (E52100),
      ASTM A646 (E52100)
UNS G61180 Cr-V Alloy Steel   ASTM A29 (6118), ASTM A322 (6118), ASTM A331 (6118),
UNS G61200 Cr-V Alloy Steel   ASTM A331 (6120), ASTM A519 (6120), ASTM A711
UNS G61500 Cr-V Alloy Steel   ASTM A29 (6150), ASTM A322 (6150), ASTM A331 (6150),
      ASTM A519 (6150)
UNS G81150 Ni-Cr-Mo Alloy Steel   ASTM A29 (8115), ASTM A519 (8115)
UNS G81451 Ni-Cr-Mo Alloy Steel   ASTM A322, ASTM A331 (81B45), ASTM A519 (81B45)
UNS G86150 Ni-Cr-Mo Alloy Steel   ASTM A29 (8615), ASTM A322 (8615), ASTM A331 (8615)
      ASTM A519 (8615)
UNS G86170 Ni-Cr-Mo Alloy Steel   ASTM A29 (8617), ASTM A322 (8617), ASTM A331 (8617),
      ASTM A519 (8617)
UNS G86200 Ni-Cr-Mo Alloy Steel   ASTM A29 (8620), ASTM A321 (8620), ASTM A331 (8620),
      ASTM A505 (8620), ASTM A519 (8620)
UNS G86220 Ni-Cr-Mo Alloy Steel   ASTM A29 (8627), ASTM A321 (8627), ASTM A331 (8627),
      ASTM A519 (8627)
UNS G86250 Ni-Cr-Mo Alloy Steel   ASTM A29 (8625), ASTM A321 (8625), ASTM A331 (8625),
      ASTM A519 (8625)
UNS G86270 Ni-Cr-Mo Alloy Steel   ASTM A29 (8627), ASTM A321 (8627), ASTM A331 (8627),
      ASTM A519 (8627)
UNS G86300 Ni-Cr-Mo Alloy Steel   ASTM A29 (8630), ASTM A321 (8630), ASTM A331 (8630),
      ASTM A519 (8630)
UNS G86370 Ni-Cr-Mo Alloy Steel   ASTM A29 (8637), ASTM A321 (8637), ASTM A331 (8637),
      ASTM A519 (8637)
UNS G86400 Ni-Cr-Mo Alloy Steel   ASTM A29 (8640), ASTM A321 (8640), ASTM A331 (8640),
      ASTM A519 (8640)
UNS G86420 Ni-Cr-Mo Alloy Steel   ASTM A29 (8642), ASTM A321 (8642), ASTM A331 (8642),
      ASTM A519 (8642)
UNS G86450 Ni-Cr-Mo Alloy Steel   ASTM A29 (8645), ASTM A321 (8645), ASTM A331 (8645),
      ASTM A519 (8645)
UNS G86451 Ni-Cr-Mo Alloy Steel   ASTM A519 (86B45)
UNS G86500 Ni-Cr-Mo Alloy Steel   ASTM A29 (8650), ASTM A321 (8650), ASTM A331 (8650),
      ASTM A519 (8650), ASTM A689
UNS G86550 Ni-Cr-Mo Alloy Steel   ASTM A29 (8655), ASTM A321 (8655), ASTM A331 (8655),
      ASTM A519 (8655), ASTM A689
UNS G86600 Ni-Cr-Mo Alloy Steel   ASTM A322 (8660), ASTM A519 (8660), ASTM A689 (8660), ASTM A711
UNS G87200 Ni-Cr-Mo Alloy Steel   ASTM A29 (8720), ASTM A321 (8720), ASTM A331 (8720),
      ASTM A519 (8720)
UNS G87350 Ni-Cr-Mo Alloy Steel   ASTM A519 (8735)
UNS G87400 Ni-Cr-Mo Alloy Steel   ASTM A29 (8740), ASTM A321 (8740), ASTM A331 (8740),
      ASTM A519 (8740)
UNS G87420 Ni-Cr-Mo Alloy Steel   ASTM A331 (8742), ASTM A519 (8742)
UNS G88220 Ni-Cr-Mo Alloy Steel   ASTM A29 (8622), ASTM A321 (8622), ASTM A331 (8622),
      ASTM A519 (8622)
UNS G92540 Cr-Si Alloy Steel   ASTM A29 (9254), ASTM A401
UNS G92550 Si-Mn Alloy Steel   ASTM A29 (9255)
UNS G92600 Si-Mn Alloy Steel   ASTM A29 (9260), ASTM A321 (9260), ASTM A331 (9260),
      ASTM A689
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