climbing pinion for jacking system of offshore jack-up drilling platform

Detail Information

Chemical Composition (%): (once per Heat)

Grade	C	Si≤	Mn	Cr	Ni	Mo	p≤	S≤
4340	0.37-0.43	0.15-0.30	0.6-0.8	0.7-0.9	1.65-2.00	0.20-0.30	0.035	0.040

Specifications:

Process Flow: VD ingot→Forged→Oil quenched and temered→Rough machined.

Surface and finish condition: Rough machined

Require ABS inspection and the cost is separate.

Tolerance: -0/+5mm

Heat treatment: Oil quenched and temered.

Mechanical Property: Acc. to the ASTM A370

Min Tensile Strength: 200,000 psi

Min Yield Strength(0.2% offset method): 180,000 psi

Min Elongation( % in 2 inches) 12%

Min Reduction of area(%) : 46%

Hardness: 43-46 HRC