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Mechanical Properties of CP GR2 & CP GR4
| Technical Data | CP GR 2 | CPGR2 | CP GR4 | CP GR 2 |
| | Guaranteed
Room
Temperature Minimum | Typical Strength (%RT) & Ductility
200F 400 F 600F 800F 1000F | Guaranteed
Room
Temperature Minimum | Typical Strength (%RT) & Ductility
200F 400 F 600F 800F 1000F |
| Ultimate Tensile Strength, psi | 50,000 | 80 57 46 36 28 | 80,000 | 80 57 46 36 28 |
| Yield Strength, 0.2% Offset, psi | 40,000 | 76 46 30 26 20 | 70,000 | 76 46 30 26 20 |
| El in 2"(>0.025" thick), pct | 22 | 42 37 25 31 | 15 | |
| Reduction of Area, Percent | 35 | 57 76 76 75 | 35 | |
| Bend Radius | 2T 2.5T | | 2T 2.5T | |
| Impact Charpy V, ft-lb. Room Temp. | | | 11-15 |
|
| Weld Bend Radius | Approx. 3-4T | | Approx. 3-4T |
|
| Hardness | Brinell 200 | | Brinell 265 | |
| Rupture, Stress to Produce in Hr. psi | | |
225 hr
65,000 | 430 hr
17,000 |
Physical Properties for CP GR2 & CP GR4
| Technical Data | CP GR2 | CP GR4 |
| Modulus of Elasticity, psi(10^6) Tension | 14.9 |
15.1 |
| Modulus of Elasticity, psi(10^6) Torsion | Approximately 6.5 | Approximately 6.5 |
| Density, lb/ cu Inch | 0.163 | 0.164 |
| Melting Range, Deg. F | 3000 - 3100F | 3002 - 3038F |
Specific Electrical Resistivity micro
ohms/cm/sq cm |
56 | 60 |
| Specific Heat, Btu/lb/Deg. F | 0.125 at room temperature | 0.129 |
Thermal Conductivity,
Btu/hr.Ft^2 - Deg. F/ft |
Approx. 9.5
at room temp. | Approx. 9.8
at room temp. |
Mean Coefficient of Thermal
Expansion Per F (10^6)
32-212F
32-600F
32-1000F
32-1200F
32-1500F |
4.8
5.1
5.4
5.6
5.6 |
4.8
5.1
5.4
5.6
5.6 |
| Oxidation Characteristics in Air | 400 F 600 F 800 F 1000F | 400 F 600 F 800 F 1000F |
| Short Time | Good Good Good Moderate | Good Good Good Moderate |
| Long Term | Good Good Slight Moderate | Good Good Slight Moderate |
Remarks on Fabrication for CP GR2 & CP GR4
| Technical Data | CP GR2 | CP GR4 |
| Beta Transus | 1650 - 1700 | 1715 - 1765 |
| Cutting | Readily cut with saw
or abrasive wheel |
Readily cut with saw
or abrasive wheel |
| Machining | Rigid set-up, medium speed,
heavy feed, sharp tools,
adequate coolant | Rigid set-up, medium speed,
heavy feed, sharp tools,
adequate coolant |
| Forming | Readily formable at room temp.
Complex shapes require heat | Readily formable at room temp.
Complex shapes require heat |
| Joining, Welding | Complex weldable, fusion welding
requires protection | Complex weldable, fusion welding
requires protection |
Remarks on Heat Treatment for CP GR2 & CP GR4
| Technical Data | CP GR2 | CP GR4 |
| Initial Forging | Approx. 1650F rough breakdown
finish 1550F | Approx. 1715F rough breakdown
finish 1550F |
| Annealing | 1300F, 2hr, air cool | 1300F, 2hr, air cool |
| Solution Treating | Not applicable | Not applicable |
| Aging | Not applicable | Not applicable |
| Stress Relief Annealing | 900 - 1000F, 45 min. | 900 - 1000F, 45 min. |
Other Technical Data for CP GR2 & CP GR4
| Technical Data | CP GR2 | CP GR4 |
| Principal Uses | Airframe applications, skins, chemical industry, applications where maximum formability required with moderate strength. | Airframe, chemical, marine and similar applications. |
| Available Forms | Sheet, strip, plate, bar, billet, wire, tubing, extrusions. | Sheet, strip, plate, bar, billet, wire, tubing, extrusions. |
| Nominal Composition | 0.08% max C, 0.05% max N, 0.015% max H (sheet), 0.20% max Fe. | 0.08% max C, 0.05% max N, 0.015% max H (sheet), 0.30% max Fe. |
| Type Structure | Alpha | Alpha |
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