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 - G31400~G44270
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS G31400 Alloy Steel   ASTM A331 (3140), ASTM A519 (3140)
UNS G33106 Alloy Steel   ASTM A331 (E3310), ASTM A519 (E3310)
UNS G40120 Mo Alloy Steel   ASTM A331 (4012), ASTM A505 (4012), ASTM A509 (4012)
UNS G40230 Mo Alloy Steel   ASTM A29 (4023), ASTM A322 (4023), ASTM A331 (4023),
      ASTM A29 (4023), ASTM A534 (4023)
UNS G40240 Mo Alloy Steel   ASTM A29 (4024), ASTM A322 (4024), ASTM A331 (4024),
      ASTM A519 (4024)
UNS G40270 Mo Alloy Steel   ASTM A29 (4027), ASTM A322 (4027), ASTM A331 (4027),
      ASTM A519 (4027)
UNS G40280 Mo Alloy Steel   ASTM A29 (4028), ASTM A322 (4028), ASTM A331 (4028),
      ASTM A519 (4028)
UNS G40370 Mo Alloy Steel   ASTM A29 (4037), ASTM A322 (4037), ASTM A331 (4037),
      ASTM A519 (4037), ASTM A547 (4037)
UNS G40420 Mo Alloy Steel   ASTM A29 (4042), ASTM A194 (Gr7-4042)
      ASTM A29 (4042), ASTM A519 (4042)
UNS G40470 Mo Alloy Steel   ASTM A29 (4047), ASTM A321 (4047), ASTM A331 (4047),
      ASTM A519 (4047)
UNS G40630 Mo Alloy Steel   ASTM A331 (4063), ASTM A519 (4063)
UNS G41180 Cr-Mo Alloy Steel   ASTM A29 (4118), ASTM A321 (4118), ASTM A331 (4118),
      ASTM A505 (4118), ASTM A519 (4118)
UNS G41300 Cr-Mo Alloy Steel   ASTM A29 (4130), ASTM A513 (4130), ASTM A519 (4130),
      ASTM A505 (4130), ASTM A513 (4130), ASTM A519 (4130),
      ASTM A646 (4130)
UNS G41350 Cr-Mo Alloy Steel   ASTM A29 (4135), ASTM A331 (4135), ASTM A372,
      ASTM A519 (4135)
UNS G41370 Cr-Mo Alloy Steel   ASTM A29 (4137), ASTM A322 (4137), ASTM A331 (4137),
      ASTM A372, ASTM A505 (4137), ASTM A519 (4137),
      ASTM A547 (4137)
UNS G41400 Cr-Mo Alloy Steel   ASTM A29 (4140), ASTM A322 (4140), ASTM A331 (4140),
      ASTM A505 (4140), ASTM A519 (4140), ASTM A547 (4140),
      ASTM A646 (4140), ASTM A711
UNS G41420 Cr-Mo Alloy Steel   ASTM A29 (4142), ASTM A322 (4142), ASTM A331 (4142),
      ASTM A372, ASTM A505 (4142), ASTM A519 (4142),
      ASTM A29 (4145), ASTM A322 (4145), ASTM A331 (4145),
UNS G41450 Cr-Mo Alloy Steel   ASTM A505 (4145), ASTM A519 (4145), ASTM A711
      ASTM A29 (4147), ASTM A322 (4147), ASTM A331 (4147),
UNS G41470 Cr-Mo Alloy Steel   ASTM A372, ASTM A505 (4147), ASTM A519 (4147),
      ASTM A29 (4150), ASTM A322 (4150), ASTM A331 (4150),
UNS G41500 Cr-Mo Alloy Steel   ASTM A505 (4150), ASTM A519 (4150), ASTM A331 (4150),
      ASTM A505 (4150), ASTM A519 (4150), ASTM A711
UNS G41610 Cr-Mo Alloy Steel   ASTM A29 (4161), ASTM A322 (4161), ASTM A331 (4161),
UNS G43200 Ni-Cr-Mo Alloy Steel   ASTM A29 (4320), ASTM A322 (4320, ASTM A331 (4320),
      ASTM A505 (4320), ASTM A519 (4320), ASTM A331 (4320)
UNS G43370 Ni-Cr-Mo Alloy Steel   ASTM A519 (4337)
UNS G43376 Ni-Cr-Mo Alloy Steel   ASTM A519 (E4337)
UNS G43400 Ni-Cr-Mo Alloy Steel   ASTM A29 (4340), ASTM A322 (4340), ASTM A331 (4340),
      ASTM A505 (4340), ASTM A519 (4340), ASTM A547 (4340).
      ASTM A646 (4340), ASTM A711
UNS G43406 Ni-Cr-Mo Alloy Steel   ASTM A331 (E4340), ASTM A505 (E4340),
      ASTM A519 (E4340)
UNS G44190 Mo Alloy Steel   ASTM A29 (4419), ASTM A321 (4419)
UNS G44220 Mo Alloy Steel   ASTM A29 (4422), ASTM A322 (4422), ASTM A5191 (4422),
UNS G44270 Mo Alloy Steel   ASTM A29 (4427), ASTM A322 (4427), ASTM A519 (4427),
       
       
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