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  9. Cross-Reference Table of Steel Designation Standards

Cross-Reference Table of Steel Designation Standards

The table cross-references the most widespread steel alloys in accordance with DIN, ISO, AISI, SAE, AFNOR, BS, UNE, SS, UNI and JIS standards

There is a lot of different steel grades as well as designation standards that are used depending on countries, company’s traditions and engineering practices. In order to simplify the communication process we’ve gathered the most popular steel and stainless steel grades and indicated how they cross reference with each other.

Stainless steel grades: cross-reference

DIN (Germany)ISOAISI (USA)SAEUNSAFNOR (France)BS (Great Britain)UNE (Spain)SIS (Sweden)UNI (Italy)JIS (Japan)
1.2083X40Cr14; X42Cr13420420S42000Z40C14420S37 2303 SUS420J2
1.2085X33CrS16422 + S423 + SS42000Z35CD17.S420S37 2303 SUS420J2
1.2316X38CrMo16422422S42200Z35CD17   X38CrMo16KU 
1.4021X20Cr13420420S42000Z20C13420S37 2303X20Cr13SUS420J1
1.4057X17CrNi16-2431431S43100Z6CNi6.02431S29 2321X16CrNi16SUS431
1.4112X90CrMoV18440B440BS44003Z90CDV18    SUS440B
1.4122X39CrMo17-1   Z38CD 16-01     
1.4305X10CrNiS18-9; X8CrNiS18-9303303S30300Z8CNF18-09303S31 2346 SUS303
1.4313X3CrNiMo13-4415415S41500Z6CN13-04  2385 SUS Ti6NM
1.4404X2CrNiMo17-12-2316L316LS31603Z2CND17.12316S12 2343/
1.4435X2CrNiMo18-14-3316L316LS31603 J92800Z2CND17.12316S13 2353X2CrNiMo1712SCS16
1.4462X2CrNiMoN22-5-3318LN318LNS32205^2Z3CND22-05Az318S13 2377 SUS329J3L
1.4539X1NiCrMoCu25-20-5904L904LN 08 904Z2 NCDU 25-20-5904S13   QS2025MC
1.4542X5CrNiCuNb16-4630630S17400^3Z7 CNU 16-04    SUS630
1.4828X15CrNiSi20-12309309S30900Z15CNS20.12309S24   SUH309
1.658718CrNiMo7-6   18NCD6820A1614NiCrMo13   
1.713116MnCr551155115 16MC5527M2016MnCr5251116MnCr5SCR415
1.713916MnCrS551175117 16MC5 16MnCr5-1SS212716MnCr5 
1.722542CrMo441404140 42CD4708M4042CrMo4224442CrMo4SCM440(H)
1.7227-QT42CrMoS4    709M40-QT    
1.8519-QT31CrMoV9-QT    1.8519-QT    
1.85534CrAlNi7-10    1.855  

Carbon, alloy and tool steel grades: cross-reference

DIN (Germany)ISOAISI (USA)SAEUNSAFNOR (France)BS (Great Britain)UNE (Spain)SS (Sweden)UNI (Italy)JIS (Japan)
1.0570St52-3; S355J2G310241024G10240E36-350DAE355D2135-01Fe510SM490
1.07159SMn28K, 11SMn3012131213G12130, G12150 230M07  CF9SMn28SUM22
1.1730C45W10451045G10450XC48    S50C
1.3505100Cr65210052100G52986100C6535A99/EN31 2258100Cr6SUJ2
1.2365X32CrM0V12-28H10H10T2081032CDV12-28BH10  30CrMoV12-27KUSKD7
1.2367X38CrMoV5.3H10H10T20810Z38CDV5BH10   SKD7
1.2343X38CrMoV5.1H11H11T20811Z38CDV5BH11X37CrMoV5 X37CrMoV51KUSKD6
1.2363X100CrMoV5A2A2T30102Z100CDV5BA2  X100CrMoV5-1KUSJD12
1.2379X155CrVMo12.1D2D2T30402Z160CDV12BD2  X155CrVMo12-1KUSKD11
1.208X210Cr12D3D3T30403Z200Cr12BD3X210Cr12 X210Cr13KU / X250Cr12KUSKD1
1.25560WCrV8S1S1T4190155WC20BS1 ¬271055WCrV8KU 
1.231140CrMnMo7P20P20T5162040CMD8   35CrMo8KSKT3
1.231240CrMnMoS8-6P20+SP20+ST5162040CMD8.S   35CrMo8K.SSKT3
1.273840CrMnNiMo8-6-4P20 + NiP20 + NiT5162040CMND8     
1.2764X19NiCrMo4P21P21T51621     NAK80
1.221115CrV3- h8L2L2T61202100C3   107CrV3KUSKS43
1.2067102Cr6L3L3T61203Y100C6BL3100Cr6  SUJ2
1.271456NiCrMoV7L6L6T6120655NCDV7BH224/5   SKT4
1.0037St37-K; S235JRA283A283 A 33 A 310-0 Fe360 BSN490B; C
1.216221MnCr5        SUS420J2
1.2344X40CrMoV5.1H13H13 Z40CDV5BH13X40CrMoV52242X40CrMoV5-1KUSKD61
1.2436X210CrW12   X210CrW12-1 X210CrW122313215CrW12-1KUSKD2
1.2709X3NiCoMoTi18-9-5    1.2709    
1.272150NiCr13OH251OH251    ¬2550  
1.276745NiCrMo166F76F7 45NCD16   40NiCrMoV16KUSNCM2
1.284290MnCrV8O2O2 90MnV8BO2  90MnVCr8KU 
1.299~X100CrMoV8-1-1    1.299    
1.2999~X45MoCrV5-3-1    1.2999    
1.3343S6-5-2; HS6-5-2M35M35 Z85WDCVBM2 2722HS6-5-2-5SKH9; SKH51

Differences between designation standards

DIN (Germany) 

DIN stands for Deutsches Institut für Normung eV (German Institute for Standardization). This standard uses the letters DIN, followed by alphanumeric codes or figures representing chemical composition, for designation of steels and steel alloys.


AISI stands for American Iron and Steel Institute, an association of North American steel producers. They are in charge of steel standards, and some companies use the AISI standards to regulate what they produce. AISI uses a basic four-digit system to show the chemical composition of carbon and alloy steels. The first digit indicates the main alloying element, The second digit of the series indicates the top grade element, and The last two digits of the series indicate the carbon concentration in percentage.

Stainless Steels are designated using a three-digit system which sometimes uses letters to indicate alloying elements. The first letter indicates the series to which the steel belongs.


SAE stands for Society of automotive engineers, is a professional association and standards development organization for the engineering industry. Like AISI, it uses a four-digit system to represent the chemical composition of alloy steels and a three-digit system to represent Stainless Steel.


UNS stands for Unified Numbering System, it is a unified identification for metals and alloys of metals popular in the USA. It consists of a single-letter prefix followed by five digits representing a materials composition. In most cases the letter is suggestive of the family of metals identified. For steel and steel alloys, letters S- for Stainless Steels, G- Carbon and alloy steels, and T- Tool steels, depending on the material and its composition.

AFNOR (France)

AFNOR Stands for Association Française de Normalisation, which means French Standardization in English. AFNOR is a French organization for standardization. It uses the following specification for designation of steel alloys:

  • First figures representing the carbon content.
  • Letters showing the main alloying element.
  • Following figures expressing the content of the first material on the list.

For steel, stainless grades were designated by Z, and then the figure following the letters would indicate the percentage of the element.

BS (Great Britain)

BS stands for British Standards; these standards are developed by the British standard institute. This standard uses alphanumeric characters to designate steel alloys. For stainless steels the first three digits in the British system are the AISI numbers, followed by the letter S, for stainless, and two digits to indicate modification.

UNE (Spain) 

UNE stands for Asociación Española de Normalización, which means Spanish organization for standardization. The UNE is similar to the International Organization for Standardization (ISO), therefore like the ISO, UNE uses chemical composition for designation of steel alloys.

SIS (Sweden)

SIS stands for Swedish Institute of Standards, the official standards organisation in Sweden. This system names Steel alloys using a four-digit numbering system that describes the main alloying elements and composition.

UNI (Italy) 

UNI stands for Ente Nazionale Italiano di Unificazione, it is an association that performs regulatory services in Italy. UNI’s designation for steel and aluminum alloys are similar to EN and ISO designations. This body therefore uses chemical composition for designation of steel and alloys.

JIS (Japan) 

JIS stands for Japanese Industrial Standards, and are developed by the Japanese Industrial Standards Committee (JISC) in Tokyo. The specifications for designating steel and steel alloys begin with the prefix JIS, followed by a letter, where the letter denotes the area of division such as G- Ferrous materials and metallurgy, A- Civil engineering and architecture, and E- Railway engineering. The letter is followed by four digits which represent the materials composition.