Below are the main technical characteristics of the most common types of steel used to realise small microcastings.
| CATEGORIES | CORRESPONDING STANDARDS | CHEMICAL ANALYSIS | MECHANICAL CHARACTERISTICS | |||||||||
| UNI | AISI | C% | Mn% | Si% | Cr% | Ni% | Mo% | R N/mm² |
Rs N/mm² |
A% min. |
Hardness | |
| STEELS FOR CEMENTING |
C10 | 1010 | 0,07÷0,12 | 0,3÷0,7 | <1,00 | (490) (883) |
(=294) | (12) | HRC 55-62 |
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| 18NiCrMo5 | 0,15÷0,21 | 0,6÷0,9 | <1,00 | 0,7÷1,0 | 1,2÷1,5 | 0,15÷0,25 | (1230) (1520) |
(=980) | (8) | HRC 58-65 |
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| STEELS FOR TEMPERING |
C40 | 1040 | 0,37÷0,44 | 0,5÷0,8 | <1,00 | (700) (840) |
(=490) | (15) | HRC 205-245 |
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| 39NiCrMo15 | 0,30÷0,38 | 0,3÷0,8 | <0,75 | 1,5÷1,8 | 3,5÷4,0 | 0,2÷0,4 | (1717) (1962) |
(=1275) | (7) | HRC 50-55 |
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| STEELS FOR BEARINGS |
100Cr6 | 52100 | 0,95÷1,10 | 0,3÷0,5 | <0,75 | 1,4÷1,65 | HRC =60 |
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| STAINLESS STEELS |
X5CrNi1810 | 304 | <0,08 | <1,50 | <2,00 | 18 ÷ 21 | 8 ÷ 11 | 481 min. |
206 min. |
35 | HRB 90max |
|
| X2CrNi1811 | 304L | <0,03 | <1,50 | <2,00 | 17 ÷ 21 | 8 ÷ 12 | 446 min. |
192 min. |
35 | HRB 86max |
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| X5CrNiMo1712 | 316 | <0,08 | <1,50 | <2,00 | 18 ÷ 21 | 9 ÷ 12 | 2÷3 | 481 min. |
206 min. |
30 | HRB 90max |
|
| X2CrNiMo1712 | 316L | <0,03 | <1,50 | <1,50 | 17÷ 21 | 9 ÷ 13 | 2÷3 | 481 min. |
206 min. |
30 | HRB 86 max |
|
| X12Cr13 | 410 | 0,05÷0,15 | <1,00 | <1,50 | 11,5÷14 | <1,00 | <0,50 | 652 min. |
515 min. |
8 | HRB 90-140 |
|
| X30Cr13 | 420 | 0,2÷0,4 | <1,00 | <1,50 | 11,5÷14 | <1,00 | <0,50 | (785) (980) |
(590) min. |
(12) | HRC 21-30 |
|
| X8Cr17 | 430 | <0,1 | <1,00 | <1,00 | 16 ÷ 18 | (440) (640) |
(245) min. |
(18) | HB 192max |
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