DRAFT SALIENT CHARACTERISTICS.pdf
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This document is a Salient Characteristics specification sheet for an Angle part (Part Number: 70217-02702-138) designed for the UH60 helicopter platform. The specification details precise manufacturing and treatment requirements, including material composition (primarily 4130 Cond. N, 0.050" thick), alternative material options (4130 A and 4130 N), and specific processing standards. Surface treatments include nickel plating (Class 1, Grade A, 0.0016-0.0024" thick) and selective chrome plating (Class 2B, 0.0025-0.0035" thick), with additional coating requirements of one epoxy coat and two polyurethane top coats following Sikorsky specifications. The part must be manufactured according to Sikorsky Drawing 70217-02702, Sheet 2, Rev AV, and undergo heat treatment to achieve 125,000 P.S.I. hardness with a Rockwell C hardness of 26-33 after forming.
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SALIENT CHARACTERISTICS
ANGLE
PART NUMBER: 70217-02702-138
PLATFORM: UH60
- Manufacture IAW Sikorsky Drawing: 70217-02702, Sheet 2, Rev AV
- Material: 4130 Cond. N, 0.050" THK, IAW MIL-S-18729
- Alt. Material: 4130 A, 0.050" THK, IAW AMS6350
- Alt. Material: 4130 N, 0.050" THK, IAW AMS6345
- Heat Treat IAW AMS2759, 125,000 P.S.I., RC 26-33, after forming.
- Surface Treat IAW AMS-QQ-N-290, Nickle Plate, Class 1, Grade A, THK .0016-.0024., all over
- Surface Treat IAW AMS2460, Chrome Plate, Class 2B, THK .0025-.0035. noted areas only
- Paint IAW MIL-PRF-85582, Epoxy, (1 Coat)
- Top Coat Polyurethane IAW Sikorsky Spec SS8555, (2 Coats)
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