Bi Metal Liner

Feature	Technical Detail	Direct Benefit for the Buyer
Inner Sleeve Hardness	High Chromium Cast Iron, HRC ≥ 60	Wear Resistance: Unmatched hardness to resist highly abrasive drilling fluids (mud).
High Chromium Content	26% - 28% Cr	Corrosion/Abrasion Resistance: Provides superior protection against chemical wear and solid particulate friction.
Outer Hull Material	#45 Steel Forging, HB163-217	Strength & Safety: Provides high tensile strength and structural integrity under extreme pressure surges.
Anti-Slippage Design	HP Lip Design	Reliability: Prevents catastrophic slippage of the inner sleeve within the outer hull, ensuring seal integrity.
Inner Sleeve Finish	Ra 0.05 Surface Finish	Piston Life: Minimizes friction and heat generation, substantially increasing the service life of mud pump pistons and packing.

Feature

Technical Detail

Direct Benefit for the Buyer

Inner Sleeve Hardness

High Chromium Cast Iron, HRC ≥ 60

Wear Resistance: Unmatched hardness to resist highly abrasive drilling fluids (mud).

High Chromium Content

26% - 28% Cr

Corrosion/Abrasion Resistance: Provides superior protection against chemical wear and solid particulate friction.

Outer Hull Material

#45 Steel Forging, HB163-217

Strength & Safety: Provides high tensile strength and structural integrity under extreme pressure surges.

Anti-Slippage Design

HP Lip Design

Reliability: Prevents catastrophic slippage of the inner sleeve within the outer hull, ensuring seal integrity.

Inner Sleeve Finish

Ra 0.05 Surface Finish

Piston Life: Minimizes friction and heat generation, substantially increasing the service life of mud pump pistons and packing.

Description

⚙️ Detailed Technical Specification Table

This table is essential for technical buyers (mechanics, engineers).

Specification Category	Detail	Value
Operating Pressure	Maximum Rated Pressure	7500 PSI
Guaranteed Service Life	Minimum Hours	≥ 800 Hours
API Compliance	Standard Met	API 7K (Exceeded)
Inner Sleeve Material	Composition / Casting Method	High Chromium Cast Iron, Centrifugal Casting
Inner Sleeve Hardness	Rockwell C Scale (HRC)	HRC ≥ 60
Inner Sleeve Finish (Ra)	Surface Roughness	Ra 0.05
Outer Hull Material	Composition / Forming Method	#45 Steel Forging
Outer Hull Hardness	Brinell Hardness (HB)	HB163 – 217

Chemical Composition Breakdown

Use the chemical data below on a dedicated “Technical Data Sheet” PDF linked on the product page.

Element	Outer Hull (Mandrel) Content (%)	Inner Sleeve (Wear Surface) Content (%)
C	0.42-0.50	2.80-3.10
Cr (Chromium)	< 0.25	26-28 (High Corrosion/Wear)
Mn	0.5-0.8	0.5-1.0
Si	0.17-0.37	0.50-0.80
Mo	—	0-1.0
Ni	—	0-1.5

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