15H, 17Cr3, 15Cr3 – case-hardening steel according to PN H-84030/02 and ISO 683-17:2014.
Table of content:
| Standard | Grade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||||||||||
| C: | Si: | Mn: | P: | S: | Cr: | Ni: | Cu: | ||||||||
| PN | 15H | ||||||||||||||
| 0,12-0,18 | 0,17-0,37 | 0,5-0,8 | <0.035 | <0.035 | 0.7-1.0 | <0.3 | - | ||||||||
| EN | 15Cr2 | ||||||||||||||
| 0,12-0,18 | 0,15-0,40 | 0,4-0,6 | <0.035 | <0.035 | 0,4-0,7 | - | - | ||||||||
| EN | 17Cr3 / 1.7016 | ||||||||||||||
| 0,14-0,20 | <0.4 | 0.6-0.9 | <0.025 | <0.035 | 0,7-1,0 | - | - | ||||||||
| NF | 12C3 | ||||||||||||||
| 0,09-0,15 | <0,4 | 0.6-0.9 | <0,04 | <0.035 | 0,6-1,0 | - | - | ||||||||
| JIS | SCr415 | ||||||||||||||
| 0,13-0,18 | 0,15-0,35 | 0,6-0,9 | <0,030 | <0,030 | 0,9-1,2 | <0,25 | <0,3 | ||||||||
| GOST | 15Ch | ||||||||||||||
| 0,12-0,18 | 0,17-0,37 | 0,4-0,7 | <0,035 | <0,035 | 0,7-1,0 | <0,3 | <0,3 | ||||||||
| UNE | F-1516 | ||||||||||||||
| 0,14-0,19 | <0,4 | 1,0-1,3 | <0,025 | <0,035 | 0,7-0,9 | - | - | ||||||||
15H, 17Cr3, 15Cr3 – description
Steel for machine parts with low strength requirements, e.g. spindles, pins, camshafts and bushings. Weldable, machinable and cuttable steel. Weld only before carburizing. The steel is similar to 20Cr4 but has lower mechanical properties.
Physical and mechanical properties
Here You can find the mechanical properties of selected alloys. Despite their similarities, they clearly differ.
| Properties | Grade | |||||
|---|---|---|---|---|---|---|
| PN | EN | EN | GOST | ČSN | ||
| 15H | 15Cr3 | 17Cr3 | 15Ch | 14120 | ||
| Diameter: | D | 15 mm | 30 mm | 10 mm | 15 mm | 30 mm |
| Yield strength: | Re | > 490 MPa | > 390 MPa | - | > 490 MPa | > 343 MPa |
| Tensile strength: | Rm | > 690 MPa | 590-880 MPa | < 620 MPa | > 686 MPa | > 588 MPa |
| Wydłużenie: | A5 | 12 % | 14 % | - | 12 % | 14 % |
| Udarność KCU, 20°C: | KCU2 | 70 J/cm2 | - | - | 69 J/cm2 | R3 59 J/cm2 |
| Twardość po odprężaniu: | HB | < 179 HB | < 202 HB | < 174 HB | 140-187 HB | < 155 HB |
Mechanical properties of 15Ch forgings
- Thickness: < 100 mm
- Yield strength: > 345 MPa
- Tensile strength Rm: > 590 MPa
- Elongation A: > 18 %
- Hardness: 174-217 HB
- Impact Value KCU: > 59 J/m2
- Percent reduction of area Z: > 45 %
- Thickness: 100-300 mm
- Yield strength: > 345 MPa
- Tensile strength Rm: > 590 MPa
- Elongation A: > 17 %
- Hardness: 174-217 HB
- Impact Value KCU: > 54 J/m2
- Percent reduction of area Z: > 40 %
- Thickness: 5-10 mm
- Yield strength: > 345 MPa
- Tensile strength Rm: > 590 MPa
- Elongation A: > 14 %
- Hardness: 174-217 HB
- Impact Value KCU: > 49 J/m2
- Percent reduction of area Z: > 38 %
- Thickness: 5-10 mm
- Yield strength: > 345 MPa
- Tensile strength Rm: > 590 MPa
- Elongation A: > 12 %
- Hardness: 174-217 HB
- Impact Value KCU: > 39 J/m2
- Percent reduction of area Z: > 33 %
Mechanical properties of 15Ch tubes
- Wall thickness: < 10 mm
- Tensile strength Rm: > 412 MPa
- Elongation A: > 19 %
- Wall thickness: > 10 mm
- Tensile strength Rm: > 412 MPa
- Elongation A: > 19 %
- Hardness: < 179 HB
- Bars, strips and reels
- Rods
- Wires
- Plates
Heat treatment and plastic working
Following parameters are recommended for working and heat treatment
| Treatment | Grade | |||||
|---|---|---|---|---|---|---|
| PN | EN | EN | GOST | ČSN | ||
| 15H | 15Cr3 | 17Cr3 | 15Ch | 14120 | ||
| Quenching | Temperature | 880℃ | 870-900℃ | 860-900℃ | 880℃ | 870-900℃ |
| Cooling | oil, water | oil, water | oil, water | - | water | |
| Tempering | Temperature | 180℃ | 150-180℃ | 150-200℃ | 180℃ | 150-200℃ |
| Cooling | air, oil | - | - | air, oil | air | |
We deliver this steel alloy as:
Replacements, equivalents and other designations:
15H, 15Ch, 15Cr2, 17Cr3, 17CrS3, 12C3, 15C2, 18C3, 527A17, 527H17, 527M17, Scr21, Scr415, 15Cr9q, F-1516, 5115, G51150, 1.7016, 17ChG