Similar to X39Cr13 (AISI 420) but with a higher carbon content, suitable for small pieces with high hardness, including rollers and balls for special bearings.
Standard Reference: EN 10088-3: 2014 (Hot-rolled and bright products)
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
|
EN 10088-3: 2005 |
(UNI 6900: 71) |
(DIN 17440 - 85) |
(NF A 35-574-90) |
(BS 970 pt. 3-91) | AISI | ||
| Grade | N° | Werkstoff | N° | ||||
| X46Cr13 | 1.4034 | (X40Cr14) | X46Cr13 | 1.4034 | Z44C14 | - | AISI 420 |
| C | Si / max | Mn / max | P / max | S /max | Cr |
|---|---|---|---|---|---|
| 0,43÷0,50 | 1,00 | 1,50 | 0,040 | 0,030 | 12,5÷14,5 |
| Size (mm) | Heat treatment | Hardness HB max* | Rp 0,2 (MPa) min | Rm (MPa) | A5 (%) min | KV (J) min |
|---|---|---|---|---|---|---|
| d≤100 | Annealed (+A) | 245 | - | 800 max | - | - |
| Quenched + Tempered (+QT 800) | - | 650 | 800÷1000 | 10 | 12 |
* only for guidance
| Size (mm) | Annealed | Quenched + Tempered | |||||
|---|---|---|---|---|---|---|---|
| Rm (MPa) max | HB max* | Heat treatment | Rp 0,2 (MPa) min | Rm (MPa) max | A5 (%) min** | KV (J) min | |
| d≤10 | 950 | 305 | Quenched + Tempered (+QT 850) | 700 | 900÷1150 | 7 | - |
| 10<d≤16 | 950 | 305 | 700 | 900÷1150 | 7 | - | |
| 16<d≤40 | 900 | 280 | 650 | 850÷1100 | 8 | 12 | |
| 40<d≤63 | 840 | 260 | 650 | 850÷1000 | 8 | 12 | |
| 63<d≤100 | 800 | 245 | 650 | 850÷1000 | 10 | 12 | |
* for reference only
** values valid only for size ≥5 mm
| Tensile strength levels | Rm (MPa) |
|---|---|
| +C 500 | 500÷700 |
| +C 650 | 650÷850 |
| +C 800 | 800÷1000 |
| +C 900 | 900÷1100 |
Note: the desired tensile strength level shall be evaluated depending on diameter required
| Size | A (%) max | Rm (MPa) max |
|---|---|---|
| 0,50≤d≤1,00 | 10 | 1100 |
| 1,00≤d≤3,00 | 10 | 1050 |
| 3,00≤d≤5,00 | 10 | 1000 |
| 5,00≤d≤16,00 | 15 | 950 |
Note: If skin passed, Rm might be increased by up to 50 MPa
| Operation | C |
|---|---|
| Hot forgings deformation | 900÷1100 |
| Annealing (furnace, air) | 750÷850 |
| Quenching in air or oil | 950÷1050 |
| Tempering (QT 850) | 650÷700 |
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