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 : Heat and Corrosion Refractory Metals and Alloys - S31700~S35000
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS S31700 Austenitic Cr-Ni-Mo 317 ASTM A167 (317), ASTM A240 (317), ASTM A249 (317), ASTM A269 (317),
  Stainless Steel   ASTM A276 (317), ASTM A312 (317), ASTM A314 (317), ASTM A403 (317),
      ASTM A409 (317), ASTM A473 (317), ASTM A478 (317), ASTM A511 (317),
      ASTM A554 (317), ASTM A580 (317), ASTM A632 (317)
UNS S31703 Austenitic Cr-Ni-Mo 317L ASTM A167 (317L), ASTM A240 (317L)
  Stainless Steel    
UNS S31725 Austenitic Cr-Ni-Mo 317LM ASTM A167, ASTM A213, ASTM A240, ASTM A249, ASTM A269, ASTM A276, ASTM A312,
  Stainless Steel   ASTM A358, ASTM A376, ASTM A409, ASTM A479
UNS S31726 Austenitic Cr-Ni-Mo 317L4 ASTM A167, ASTM A213, ASTM A240, ASTM A249, ASTM A269, ASTM A276, ASTM A312,
  Stainless Steel   ASTM A358, ASTM A376, ASTM A409, ASTM A479
UNS S31753 Austenitic Cr-Ni-Mo 317LN ASTM A167, ASTM A240
  Stainless Steel    
UNS S31803 Ferritic Austenitic Low Carbon 2205 ASTM A276, ASTM A473, ASTM A479
  Cr-Ni-Mo-N Stainless Steel    
UNS S32100 Austenitic Cr-Ni-Mo 321 ASTM A167 (321), ASTM A182 (321), ASTM A193 (321), ASTM A194 (321),
  Stainless Steel   ASTM A213 (321), ASTM A240 (321), ASTM A249 (321), ASTM A269 (321),
  (Titanium Stabilized)   ASTM A271 (321), ASTM A276 (321), ASTM A312 (321), ASTM A314 (321),
      ASTM A320 (321), ASTM A358 (321), ASTM A376 (321), ASTM A403 (321),
      ASTM A409 (321), ASTM A430 (321), ASTM A473 (321), ASTM A479 (321),
      ASTM A493 (321), ASTM A511 (321), ASTM A554 (321), ASTM A632 (321),
UNS S32109 Austenitic Cr-Ni-Mo 32IH ASTM A182 (321H), ASTM A213 (321H), ASTM A240 (321H), ASTM A249 (
  Stainless Steel   ASTM A182 (321H), ASTM A271 (321H), ASTM A312 (321H), ASTM A376 (
  (Titanium Stabilized)   321H), ASTM A271 (321H), ASTM A312 (321H), ASTM A376 (321H)
UNS S32304 Ferritic Austenitic Cr-Ni SAE 2304 ASTM A789, ASTM A790
  Stainless Steel. Low Carbon    
  with Nitrogen, Mo, and Cu    
UNS S32550 Ferritic Austenitic Cr-Ni-Mo-Cu Ferraium 255 ASTM A240, ASTM A479
  Stainless Steel    
UNS S32615 Austenitic Cr-Ni-Si-Cu-Mo Alloy SX ASTM A213, ASTM A240, ASTM A312, ASTM A351, ASTM A479, ASTM A479M
  Stainless Steel    
UNS S32750 Ferritic Austenitic Cr-Ni 2507 ASTM A789, ASTM A790
  Stainless Steel    
  with Nitrogen    
UNS S32760 Ferritic Austenitic Cr-Ni-Mo-W-N Zeron 100 ASTM A182, ASTM A240, ASTM A276, ASTM A314, ASTM A473, ASTM A790, ASTM A815
  Stainless Steel    
UNS S32900 Ferritic Austenitic Cr-Ni   ASTM A268 (329), ASTM A511 (329)
  Stainless Steel    
UNS S32950 Ferritic Austenitic Cr-Ni-Mo 7 Mo Plus ASTM A240, ASTM A789, ASTM A790
  Stainless Steel    
UNS S33100 Ni-Cr Stainless Steel F-10 ASTM A182 (F-10)
UNS S34700 Austenitic Cr-Ni Stainless Steel 347 ASTM A167 (347), ASTM A182 (347), ASTM A193 (347), ASTM A194 (347),
  (Columbium Stabilized)   ASTM A213 (347), ASTM A249 (347), ASTM A269 (347), ASTM A271 (347),
      ASTM A276 (347), ASTM A312 (347), ASTM A314 (347), ASTM A320 (347),
      ASTM A358 (347), ASTM A376 (347), ASTM A403 (347), ASTM A409 (347),
      ASTM A430 (347), ASTM A473 (347), ASTM A479 (347), ASTM A493 (347),
      ASTM A511 (347), ASTM A514 (347), ASTM A580 (347), ASTM A632 (347),
UNS S34709 Austenitic Cr-Ni Stainless Steel 247H ASTM A182 (347H), ASTM A213 (347H), ASTM A240 (347H), ASTM A249
  (Columbium Stabilized)   (347H), ASTM A271 (347H), ASTM A312 (347H), ASTM A376 (347H),
  (Ta and Co Restricted)   ASTM A403 (347H), ASTM A430 (347H), ASTM A479 (347H)
UNS S34800 Austenitic Cr-Ni Stainless Steel 348 ASTM A167 (348), ASTM A182 (348), ASTM A213 (348), ASTM A240 (348),
  (Columbium Stabilized)   ASTM A249 (348), ASTM A269 (348), ASTM A276 (348), ASTM A312 (348),
  (Ta and Co Restricted)   ASTM A314 (348), ASTM A358 (348), ASTM A376 (348), ASTM A403 (348),
      ASTM A409 (348), ASTM A479 (348), ASTM A580 (348), ASTM A632 (348)
UNS S34809 Austenitic Cr-Ni Stainless Steel 348-H ASTM A182 (348H), ASTM A213 (348H), ASTM A240 (348H), ASTM A249
  (Columbium Stabilized)   (348H), ASTM A312 (348H), ASTM A479 (348H)
  (Ta and Co Restricted)    
UNS S35000 Precipitation Hardenale Cr-Ni- AM 350 ASTM A579 (61), ASTM A693 (350)
  Mo Stainless Steel    
       
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