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> Valves Materials & Treatments

VALVES STEEL DESCRIPTION

symobls index table

 Metal Letter Symbol

Description

 NS

Nickel-Steel
An alloy steel suitable for Intake Valves 

NC

Nickel-Chromium-Molybdenum
A hard-wearing and superior alloy steel for Intake Valves 
 SC

Silicon-Chromium (SILCROME 1)
Suitalbe for petrol and diesel engine Intake and Exhaust Valves.

 XB

Chromium-Nickel-Silicon
A quality Exhaust Valve steel which has good resistance abilities to high temperature scaling and corrosion 

 TF

High Chromium-Manganese Austenitic Steel (21-4N)
Heat resisting steel for Intake and Exhaust Valves that also features corrosion resistance qualities. 

BM    

BI-Metal
Consisting of austenitic steel head and NS, NC or TF stem.

SF

Stellite Seat

ST

Stellite Tappet End

CF

Chrome Flashed Stem

BF

Brightray Seat


NIMONIC N80A / INCONEL X-751
Superalloys

Both Nimonic and Inconel are a part of the austenitic nickel based superalloys which main feature is their oxidation and corrosion resistance abilities.
The rich nickel composition of the Nimonic and Inconel is used by SINUS for the production of the valve’s head area.
Valves made using either the Nimonic or the Inconel superalloy are designated for engines that outputs extremely high temperatures.


STELLITE PLATING ON VALVE SEAT SURFACE
Prevents face deformation

Stelite alloy is a range of cobalt chromium alloys designed for wear resistance.
The stelite alloy is completely non-magnetic and displays astounding level of hardness and toughness.
Stellite welding on the valve’s seat surface enalbes significantly longer lifespan to the valve and also prevents the valve’s face area from deforming.


SPIRAL / SWIRL POLISH
strength improvement

The Spiral / Swirl Polish process is designated to improve the valve’s strength and break the concentric lines.


JET FLOW (J.F) CUT
Gas flow improvement
Jet Flow (J.F) cut is designated to improve the gas flow.