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MATERIAL SPECIFICATION |
TCR-006-R0 |
| TITLE: |
Induction Hardened Chrome Plated steel Bar
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PAGE NO: 1 OF 1 |
| DATE: 25.01.2009 |
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1. MATERIAL SPECIFICATION AND REF. DOCUMENT |
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42CrMo4 |
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2. CHEMICAL COMPOSITION (%) |
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C |
Mn |
Si |
Cr |
Mo |
V |
S(Max) |
P(Max) |
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0.38-0.45 |
0.6-0.9 |
0.15-0.4 |
0.9-1.2 |
0.15-0.25 |
â‚‹ |
0.03 |
0.03 |
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3. MECHANICAL PROPERTIES |
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UTS (Min.) |
Y.S (Min.) |
%EL5.65√A(Min) |
CHARPY |
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950 N/MM2 |
800 N/MM2 |
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47J |
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4. SUPPLY CONDITION |
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Ground, Q+T,Induction Hardened and Chrome plated |
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5. INDUCTION HARDNESS |
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Case depth 1.5 to 2.5 mm and hardness 50-55 HRC |
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6. CHROME PLATING THICKNESS AND HARDNESS |
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Thickness 20-30 microns, Hardness 850-1150 HV (Vickers 100g.) |
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7. SURFACE ROUGHNESS |
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Ra ≤0.2 Micron and Rt ≤2 Micron |
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8. TOLERANCES ON DIA |
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ISO f7 on the diameter |
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9. OVALITY |
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Half of the tolerance ISO f7 |
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10. STRAIGHTNESS |
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≤0.2 mm/M |
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11. CORROSION RASISTANCE |
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Test in natural salt spray according to ISO 9227/ASTM B117-96hours |
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Results evaluation according to ISO 10289 RATING 8-10 |
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12. COHESION |
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No craks,breaking or detaching after thermic shock(warming up at 300 celsius degrees |
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and cooling in water) |
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13. POROSITY |
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Test according to ISO 1456/1458 and result yaluation according to |
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ISO 4540 rating 8-10 |
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14. PACKING |
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Anti rust oil to be applied on material and each rod to be packed in paper sleeved |
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15. SIZE |
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From 6 mm to 220 mm |
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16. RANDOM LENGTH |
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From Ø6 to Ø12 length 800-2000mm |
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From Ø16 to Ø40 length 1200-4000mm |
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From Ø45 to Ø220 length 1500-8000mm |
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17. FIX LENGTH AND CUT TOLERANCE |
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Length up to 1000mm -0/+2mm |
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Length over 1000mm -0/+3mm |
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18. SCOPE |
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Hydraulic cylinder piston rod for Back-hoe loader and earth moving application. |
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machine tools application |
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19. NEAREST EQUIVALENT MATERIAL |
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EN-19,BS:970 |
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