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 - S35500~S43035
UNS No
Description
ASTM Brand/Trp
ASTM Equivalent
UNS S35500 Precipitation Hardenable Cr-Ni- AM 355 ASTM A564 (634), ASTM A579 (634), ASTM A693 (634), ASTM A705 (634)
  Mo Stainless Steel    
UNS S36200 Precipitation Hardenable Cr-Ni- Almar 362 ASTM A564 (XM-9), ASTM A693 (XM-9), ASTM A705 (XM-9)
  Stainless Steel    
UNS S38400 Austenitic Cr-Ni Stainless Steel 384 ASTM A493 (384)
  (Low Work Hardening)    
UNS S38660 Austenitic Cr-Ni-Mo   ASTM A771
  Stainless Steel Reactor Grace    
       
UNS S40300 Cr Stainless Steel 403 ASTM A176 (403), ASTM A276 (403), ASTM A314 (403), ASTM A473 (405),
  (Hardenable by Heat Treament)   ASTM A479 (403), ASTM A511 (403). ASTM A580 (403)
UNS S40500 Cr Stainless Steel 405 ASTM A176 (405), ASTM A473 (405), ASTM A479 (405), ASTM A511 (405),
  (Not Hardenable by Heat   ASTM A314 (405), ASTM A473 (405), ASTM A479 (405), ASTM A511 (405)
  Treament)   ASTM A580 (405)
UNS S40800 Ferritic Cr Stainless Steel   ASTM A268
UNS S40900 Ferritic Cr Stainless Steel 409 ASTM A176 (409), ASTM A268 (409)
UNS S40940 Ferritic Cr Stainless Steel with Cb 409Cb ASTM A493
UNS S41000 Cr Stainless Steel 410 ASTM A176 (410). ASTM A182 (F62). ASTM A193 (41), ASTM A194 (410),
  (Hardenable by Heat Treament)   ASTM A240 (410), 268 (410), ASTM A276 (410), ASTM A314 (410),
      ASTM A336 (F6), ASTM A473 (410), ASTM A479 (410), ASTM A493 (410),
      ASTM A511 (410), ASTM A580 (410)
UNS S41001 Cr Super Strength Steel   ASTM A579 (51)
UNS S41008 Cr Stainless Steel(Hardenable by 410S ASTM A176 (410 S), ASTM A240 (410 S), ASTM A473 (410 S)
  Heat Treament.(Low Carbon    
UNS S41026 Martensitic Cr Stainless Steel with   ASTM A418 (F6b)
  Mo    
UNS S41050 Ferritic Cr Stainless Steel with Ni E-4 ASTM A176, ASTM A240
UNS S41400 Cr Stainless Steel with Low   ASTM A276 (414), ASTM A314 (414), ASTM A473 (414), ASTM A511 (414),
  Nickel Content   ASTM A580 (416)
UNS S41500 Ferritic Cr Stainless Steel with Ni   ASTM A182 (F6NM), ASTM A268
  Nickel    
UNS S41600 Cr Stainless Steel 416 ASTM A194 (416), ASTM A314 (416), ASTM A473 (416), ASTM A581 (416),
  (Free Machining)   ASTM A582 (416)
UNS S41623 Martensitic Cr Free Machining 416Se ASTM A194 (416 Se), ASTM A314 (416 Se), ASTM A473 (416 Se),
  Stainless Steel (Se Bearing)   ASTM A511 (416 Se), ASTM A581 (416 Se), ASTM A582 (416 Se),
UNS S41800 Martensitic Cr-W-Ni Stainless and Greek Ascoloy ASTM A565 (615)
  Heat Resisting Steel    
UNS S42000 Hardenable Cr Stainless Steel 420 276 (420), ASTM A314 (420), ASTM A473 (420), ASTM A580 (420)
UNS S42010 Hardenable Cr Stainless Steel Low Ni ASTM A276, ASTM A314
    -Low Mo  
UNS S42023 Martensitic Cr Free Machining 420F Se 582 (420F Se)
  Stainless Steel (Se Bearing)    
UNS S42200 Hardenable Cr Stainless Steel   ASTM A565 (616)
UNS S42201 Hardenable Cr Superstrength Steel   ASTM A579 (52)
UNS S42300 Hardenable Cr-Mo-V Stainless Labeloy ASTM A565 (619)
  Steel    
UNS S42400 Ferritic Stainless Steel   ASTM A182 (F6NM)
UNS S42900 Cr Stainless Steel 429 ASTM A176 (429), ASTM A182 (429), ASTM A240 (429), ASTM A268 (429),
      ASTM A276 (429), ASTM A276 (429), ASTM A314 (429), ASTM A473 (429),
      ASTM A493 (429), ASTM A511 (429), ASTM A554 (429)
UNS S43000 Cr Stainless Steel 430 ASTM A176 (430), ASTM A182 (430), ASTM A240 (430), ASTM A268 (430),
      ASTM A276 (430), ASTM A314 (430), ASTM A473 (430), ASTM A479 (430),
UNS S43020 Free Machining Cr Stainless Steel 430F ASTM A314 (430-F), ASTM A473 (430 F), ASTM A581 (430 F), ASTM A582
  (S Baearing)   (430 F)
UNS S43023 Free Machining Cr Stainless Steel 430Se  
  (Se Baearing)    
UNS S43035 Ferritic Cr-Ti Stainless Steel HWT Acualloy  
       
       
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