Buy 3S106 Nitriding Alloy Steel Round Bars Online At Best Price in Mumbai

Element	Weight Range (%)	Function in 3S106 / 4S106 Steel
Carbon ( $\text{C}$ )	0.20 â€“ 0.28	Delivers core strength and high fatigue limits without sacrificing ductility.
Chromium ( $\text{Cr}$ )	3.00 â€“ 3.50	Primary nitride former; forms ultra-hard $\text{CrN}$ precipitates in the case layer.
Molybdenum ( $\text{Mo}$ )	0.50 â€“ 0.70	Eliminates temper brittleness; enhances high-temperature creep strength.
Manganese ( $\text{Mn}$ )	0.40 â€“ 0.70	Increases core hardenability across thick ruling sections.
Silicon ( $\text{Si}$ )	0.10 â€“ 0.35	Deoxidizer during steelmaking.
Nickel ( $\text{Ni}$ )	$\le 0.30\text{ max}$	Kept low to optimize nitrided surface layer depth and uniform hardness.
Phosphorus ( $\text{P}$ )	$\le 0.020\text{ max}$	Aerospace cleanliness limit to protect transverse fatigue strength.
Sulfur ( $\text{S}$ )	$\le 0.020\text{ max}$	Restricted to maintain high impact energy limits.

Property	Value (Core / Pre-Nitrided State)	Value (Post-Nitrided Surface)
Tensile Strength ( $\sigma_b$ )	930 â€“ 1080 MPa	â€”
0.2% Proof Stress ( $\sigma_{0.2}$ )	$\ge 740\text{ MPa}$	â€”
Elongation ( $A_5$ )	$\ge 13\%$	â€”
Izod Impact Energy	$\ge 47.5\text{ J}$ ( $35\text{ ft}\cdot\text{lbf}$ )	â€”
Core Hardness	269 â€“ 321 HB (285 â€“ 340 HV)	â€”
Nitrided Surface Hardness	â€”	650 â€“ 800+ HV1 ( $\approx 58\text{--}64\text{ HRC}$ )
Effective Case Depth	â€”	0.20 â€“ 0.60 mm (cycle-dependent)