Material numbers
German material number (Werkstoffnummer), EN name, old DIN name and the US equivalent at a glance. 53 materials from steel, stainless steel, tool steel, aluminium, copper, titanium and cast iron.
53 materials
| Material no. | EN name | Old DIN name | AISI / SAE / AA | UNS |
|---|---|---|---|---|
| 1.0037 Steel | S235JR | St37-2 | – Withdrawn, now 1.0038 | – |
| 1.0038 Steel | S235JR | RSt37-2 | – US: ASTM A36 only functionally comparable | – |
| 1.0570 Steel | S355J2G3 | St52-3 | – Now 1.0577 (S355J2). US: ASTM A572 Gr. 50 only functionally comparable | – |
| 1.0401 Steel | C15 | C15 | 1015 | G10150 |
| 1.0503 Steel | C45 | C45 | 1045 | G10450 |
| 1.1191 Steel | C45E | Ck45 | 1045 | G10450 |
| 1.0715 Steel | 11SMn30 | 9SMn28 | 1215 Sometimes listed as SAE 1213 | G12150 |
| 1.0718 Steel | 11SMnPb30 | 9SMnPb28 | 12L14 Sometimes listed as 12L13 or 12L15 | G12144 |
| 1.7131 Steel | 16MnCr5 | 16MnCr5 | 5115 | G51150 |
| 1.7035 Steel | 41Cr4 | 41Cr4 | 5140 | G51400 |
| 1.7225 Steel | 42CrMo4 | 42CrMo4 | 4140 | G41400 |
| 1.6582 Steel | 34CrNiMo6 | 34CrNiMo6 | 4340 Sometimes listed as SAE 4337 | G43400 |
| 1.3505 Steel | 100Cr6 | 100Cr6 | 52100 | G52986 |
| 1.2379 Tool steel | X153CrMoV12 | X155CrVMo12-1 | D2 | T30402 |
| 1.2842 Tool steel | 90MnCrV8 | 90MnCrV8 | O2 | T31502 |
| 1.2312 Tool steel | 40CrMnMoS8-6 | 40CrMnMoS8-6 | P20+S P20+S is a trade name, not an AISI grade | – |
| 1.2738 Tool steel | 40CrMnNiMo8-6-4 | 40CrMnNiMo8-6-4 | P20+Ni P20+Ni is a trade name, not an AISI grade | – |
| 1.2343 Tool steel | X37CrMoV5-1 | X38CrMoV5-1 | H11 | T20811 |
| 1.2344 Tool steel | X40CrMoV5-1 | X40CrMoV5-1 | H13 | T20813 |
| 1.2510 Tool steel | 100MnCrW4 | 100MnCrW4 | O1 | T31501 |
| 1.4301 Stainless · V2A | X5CrNi18-10 | – | 304 | S30400 |
| 1.4307 Stainless | X2CrNi18-9 | – | 304L | S30403 |
| 1.4305 Stainless | X8CrNiS18-9 | – | 303 | S30300 |
| 1.4401 Stainless · V4A | X5CrNiMo17-12-2 | – | 316 | S31600 |
| 1.4404 Stainless · V4A | X2CrNiMo17-12-2 | – | 316L | S31603 |
| 1.4571 Stainless · V4A | X6CrNiMoTi17-12-2 | – | 316Ti | S31635 |
| 1.4104 Stainless | X14CrMoS17 | – | 430F Approximate only: 1.4104 contains Mo, 430F does not | S43020 |
| 1.4021 Stainless | X20Cr13 | – | 420 | S42000 |
| 1.4034 Stainless | X46Cr13 | – | 420 At the upper carbon end of AISI 420 | S42000 |
| 1.4057 Stainless | X17CrNi16-2 | – | 431 | S43100 |
| 1.4112 Stainless | X90CrMoV18 | – | 440B Approximate only: 1.4112 also contains V | S44003 |
| 1.4462 Stainless · Duplex | X2CrNiMoN22-5-3 | – | 2205 No AISI number, 2205 is the common trade designation | S32205 / S31803 |
| 1.4542 Stainless · 17-4PH | X5CrNiCuNb16-4 | – | 630 | S17400 |
| 3.2315 Aluminium | EN AW-AlSi1MgMn | AlMgSi1 | 6082 In the US 6061 is more common, not identical | A96082 |
| 3.3211 Aluminium | EN AW-AlMg1SiCu | AlMg1SiCu | 6061 | A96061 |
| 3.3206 Aluminium | EN AW-AlMgSi | AlMgSi0,5 | 6060 In the US 6063 is more common, not identical | A96060 |
| 3.4365 Aluminium | EN AW-AlZn5,5MgCu | AlZnMgCu1,5 | 7075 | A97075 |
| 3.3547 Aluminium | EN AW-AlMg4,5Mn0,7 | AlMg4,5Mn | 5083 | A95083 |
| 3.3535 Aluminium | EN AW-AlMg3 | AlMg3 | 5754 | A95754 |
| 3.1645 Aluminium | EN AW-AlCu4PbMgMn | AlCuMgPb | 2007 | A92007 |
| 3.1325 Aluminium | EN AW-AlCu4MgSi(A) | AlCuMg1 | 2017A 2017A is not identical to AA 2017 | – |
| 3.1655 Aluminium | EN AW-AlCu6BiPb | AlCuBiPb | 2011 | A92011 |
| CW614N Copper & brass · Ms58 | CuZn39Pb3 | CuZn39Pb3 (2.0401) | C38500 | C38500 |
| CW617N Copper & brass | CuZn40Pb2 | CuZn40Pb2 (2.0402) | C38000 | C38000 |
| CW004A Copper & brass | Cu-ETP | E-Cu58 / E-Cu57 (2.0065 / 2.0060) | C11000 | C11000 |
| CW024A Copper & brass | Cu-DHP | SF-Cu (2.0090) | C12200 | C12200 |
| CW453K Copper & brass | CuSn8 | CuSn8 (2.1030) | C52100 | C52100 |
| CW307G Copper & brass | CuAl10Ni5Fe4 | CuAl10Ni5Fe4 (2.0966) | – US equivalent inconsistent (C63000, C63200) | – |
| 3.7035 Titanium · Grade 2 | – | Ti 2 | ASTM Grade 2 | R50400 |
| 3.7165 Titanium · Grade 5 | – | TiAl6V4 | ASTM Grade 5 | R56400 |
| 5.1301 Cast iron · GG25, 0.6025, EN-JL1040 | EN-GJL-250 | GG-25 | ASTM A48 Class 35 ASTM class approximate only (30 to 40B quoted) | – |
| 5.3106 Cast iron · GGG40, 0.7040, EN-JS1030 | EN-GJS-400-15 | GGG-40 | ASTM A536 60-40-18 60-40-18 is closer to EN-GJS-400-18 | F32800 |
| 5.3300 Cast iron · GGG70, 0.7070, EN-JS1070 | EN-GJS-700-2 | GGG-70 | ASTM A536 100-70-03 Approximate only, A536 requires higher yield strength | F34800 |
No match. All columns are searched, dots and hyphens may be omitted.
International equivalents are almost always only comparable, not identical: the composition limits under EN and under ASTM or SAE do not fully match. For an order, the designation on the drawing applies. Every row is backed by at least two manufacturer or stockholder data sheets.
How the designations are built
The material number according to EN 10027-2 is a pure number. The first digit is the main group, 1 stands for steel. The next two digits give the steel group: 1.43xx are stainless steels with nickel and without molybdenum, 1.44xx with molybdenum, 1.2xxx are tool steels. Aluminium used to carry numbers from 3.0 and copper alloys from 2.0, both now have their own EN designations.
The EN name describes the composition. In X5CrNi18-10 the X means high-alloy, the 5 means 0.05 % carbon, followed by chromium and nickel at 18 and 10 %. In 42CrMo4 the 42 means 0.42 % carbon, and the 4 at the end is the chromium content times four, so about 1 % chromium. The old DIN name such as St37-2 or Ck45 has officially been replaced but still appears on many drawings.
AISI and SAE are the US systems for steel, AA is the one for aluminium. The UNS number combines all US systems in one key: S30400 is stainless steel 304, G41400 is the alloy steel 4140. Structural steels such as S235JR have no recognised AISI equivalent, so the table deliberately leaves that field empty.
From the shop floor: If an American drawing calls for 303, the European counterpart is 1.4305. The composition limits do not match exactly, though. For safety-relevant parts and for food and medical applications, get written approval for the substitute material first instead of swapping silently.
Frequently asked questions
What is 1.4301 in AISI?
1.4301 corresponds to AISI 304, the EN name is X5CrNi18-10 and the UNS number S30400. In German trade it is also called V2A. The composition limits under EN 10088 and ASTM are comparable but not identical.
What is the difference between 1.4401, 1.4404 and 1.4571?
All three are molybdenum-alloyed stainless steels, called V4A in German trade. 1.4401 corresponds to AISI 316. 1.4404 is the low-carbon version (316L) and easier to weld. 1.4571 is stabilised with titanium (316Ti) and therefore more resistant to intergranular corrosion after welding.
Which AISI steel corresponds to 42CrMo4?
AISI 4140 (UNS G41400). The material number of 42CrMo4 is 1.7225. The two steels are comparable, not identical.
What is the difference between C45 and Ck45?
Ck45 is the old DIN name for C45E with material number 1.1191, a special steel in the sense of the standard with tighter limits for phosphorus and sulphur. C45 with number 1.0503 is the quality steel with wider limits. Both are compared with SAE 1045.
What material number does AlMgSi1 have?
AlMgSi1 is the old name of EN AW-6082 (EN AW-AlSi1MgMn), and its old material number is 3.2315. In the US, 6082 is registered but not widely used. 6061 is more common there, and it is not identical.
Can I simply replace a material with its equivalent?
Not without checking. The equivalents are almost always only comparable, because the standards set different limits for the alloying elements and sometimes different minimum mechanical properties. For an order, the designation on the drawing applies. A substitute needs the approval of the design engineer.
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