Parameters rod:
C45; 20MnV6, Cromax 280x; 42CrMo4 heat treated
1.1. Species and contents by chemical analysis:
| Stuff | C% | Mn% | Si% | Cr% | Mo% | V% | S% max |
P% max |
|---|---|---|---|---|---|---|---|---|
| C45* W.N.1.1201 |
0,42-0,50 | 0,50-0,80 | 0,15-0,40 | - | - | - | 0,035 | 0,035 |
| 20MnV6 Cromax 280 X W.N.1.5217 |
0,16-0,22 | 1,40-1,75 | 0,15-0,35 | - | - | 0,10-0,20 | 0,035 | 0,035 |
| 42CrMo4** W.N.1.7225 |
0,38-0,45 | 0,60-0,90 | 0,15-0,40 | 0,90-1,20 | 0,15-0,25 | - | 0,030 | 0,030 |
1.2. Mechanical properties:
| Properties | Rm Tensile strength (N/mm2) |
Rp 0,2 Yield strength(N/mm2) |
A5 Elongation % |
Weldability | KV Impact strength J -20°C |
KCU Impact strength J 20°C |
|---|---|---|---|---|---|---|
| C45* W.N.1.1201 |
520-700 | > 320 | > 15 | Good | - | - |
| 20MnV6 Cromax 280 X W.N.1.5217 |
540-710 | > 450 | > 16 | Very good | > 27 | > 40 |
| 42CrMo4** W.N.1.7225 |
880-1150 | > 730 | > 12 | Limited | > 27 | > 25 |
* Also available in toughened surfactant
** possible to supply the rods 42CrMo4 toughened and hardened surface
2. The chromium coating properties:
| 2.1 | The thickness of the chromium layer: | 15 mm +/- 3 mm to 20 mm, a diameter of 25 microns +/- 5 mm 20 mm in diameter On special order rods provide a double layer of chromium |
|---|---|---|
| 2.2 | The hardness of the surface layer of chromium: |
850 - 1150 HV (penetrator loaded force 1N) |
| 2.3 | The hardness of the core: | 200 - 240 (diameter ≤ 90 mm) 180 - 230 (diameter> 90 mm) |
| 2.4 | Roughness: | Randmax - 0,2 microns |
| 2.5 | Adhesion: | Without cracks, fractures or chips after heat shock (sample heated above 300° C and cooled in water). |
| 2.6 | Corrosion resistance: | A minimum of 120 hours wdług ISO 9227 in a neutral saline. Class 9 ISO 4540 |
3. Tolerances
| 3.1 | ISO f7 diameter | |
|---|---|---|
| 3.2 | Ovality: | half the ISO tolerance f7 |
| 3.3 | Straightness: | < 0,5/2000 |
C45 induction hardened; 42CrMo4 Q + T
| 1.1 | Tolerance: | The benefit of all grades of steel according to the ISO tolerance f7 |
|---|---|---|
| 1.2 | Cylindricity: | 1/2 of the outer diameter tolerance |
| 1.3 | The thickness of the chromium layer: | A minimum of 20 microns, on request, we offer bars with double layer of chromium |
| 1.4 | The hardness of the chromium layer: | HV 850 ÷ 1200 (penetrator loaded with a force of 1 N) |
| 1.5 | Roughness: | Ra < 0,2 |
| 1.6 | Straightness: | 0,5 mm/m |
| 1.7 | Corrosion resistance: | A minimum of 120 hours according to ISO 9227 in a neutral solution Class 9 ISO 4540 |
2. The thickness of the hardened layer:
| Diameter | C45; 42CrMo4 Q+T |
|---|---|
| 20 - 28 | 0,75 - 1,25 |
| 30 - 90 | 1,50 - 2,50 |
| 95 - 150 | 2,50 - 3,50 |
3. Hardness*:
*The value measured on the surface
| C45 induction hardened | 42CrMo4 Q+T |
|---|---|
| 42CrMo4 Q+T | HRC min. 58 |