S4114-46Q

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Technical Parameter Table: Steel Plate S4114-46Q

Product Name: High Strength Quenched and Tempered Steel Plate
Designation: S4114-46Q
Standard: Typically conforms to JIS G 3128 (Japanese Industrial Standard)

Parameter Category	Parameter	Value / Description	Notes
Mechanical Properties	Yield Strength (Rp0.2), min	950 MPa	This is the key difference from 35Q, indicating much higher load-bearing capacity.
	Tensile Strength (Rm)	980 – 1130 MPa
	Elongation (A5), min	14 %	Slightly lower than lower-grade steels, which is typical for higher strength.
	Impact Toughness (Charpy V-Notch)
	– Test Temperature	-40 °C
	– Average Value, min	46 J	The “46” in the name refers to this impact energy value.
Chemical Composition (Typical %)	Carbon (C)	≤ 0.18 %	Controlled to maintain weldability despite the high strength.
	Silicon (Si)	≤ 0.55 %
	Manganese (Mn)	≤ 1.50 %
	Phosphorus (P)	≤ 0.030 %	Impurity, tightly controlled to ensure toughness.
	Sulfur (S)	≤ 0.030 %	Impurity, tightly controlled to ensure toughness.
	Chromium (Cr)	0.90 – 1.50 %	Enhances hardenability and strength.
	Molybdenum (Mo)	0.25 – 0.55 %	Enhances strength and temper resistance.
	Boron (B)	Added (trace)	A key element that significantly increases hardenability, allowing for high strength after Q&T.
	Vanadium (V)	May be added	Sometimes used for grain refinement and additional strength.
Physical Properties	Density	~7.85 g/cm³	Standard for carbon and low-alloy steels.
	Modulus of Elasticity	~200 GPa	Standard for steel.
	Poisson’s Ratio	~0.29	Standard for steel.
Thermal Properties	Thermal Conductivity	~42 W/m·K	Approximate value at room temperature.
	Coefficient of Thermal Expansion	~12 x 10⁻⁶ /K	Approximate value (20-100°C).
Processing & Applications	Heat Treatment	Quenched & Tempered (Q&T)	The essential process to achieve its high strength and toughness properties.
	Weldability	Fair to Good (requires strict procedures)	Pre-heating, strict control of heat input, and use of matching high-strength, low-hydrogen electrodes are mandatory.
	Typical Applications	– Extreme-duty construction equipment (e.g., core components of excavators, bulldozers) – Heavy-duty mining and logging machinery – Frame and chassis components for high-performance vehicles – Lifting and hoisting equipment (e.g., crane booms) – Components requiring high wear resistance and strength	Used in the most demanding applications where weight reduction and maximum durability are critical.