Name: 51CrV4 Cold Rolled Alloy Spring Steel Strip
Brand: Hengtaifeng

Overview

51CrV4 is a chromium-vanadium alloy spring steel (0.47-0.55% C, 0.90-1.20% Cr, 0.10-0.25% V) designed for the most demanding spring applications. The vanadium addition refines grain size and improves fatigue resistance, making 51CrV4 steel strip the premium choice for automotive valve springs, suspension springs, and torsion bars.

Chemical Composition

Element	C	Si	Mn	Cr	V	P (max)	S (max)
%	0.47-0.55	0.15-0.40	0.70-1.10	0.90-1.20	0.10-0.25	0.035	0.035

Mechanical Properties

Condition	Hardness	Tensile Strength
Annealed (spheroidized)	≤229 HB	≤810 MPa
Hardened & Tempered	45-52 HRC	1500-1800 MPa

Composition, hardness and mechanical-property tables are grade references, not guaranteed supply values. Verify the applicable standard edition, product form, condition and order-specific acceptance criteria.

Specification Review

Parameter	Range
Thickness	State the required value and tolerance; confirm grade-specific feasibility
Width	State the required value, tolerance and edge condition
Delivery Condition	Annealed / Hardened & Tempered / Blue / Gold / Polished
Edge	Slit / Round / Square
Standard	EN 10132-4, JIS G4801, ASTM A689, GB/T 1222

Cross-Reference (Equivalent Grades)

EN/DIN	JIS	ASTM/AISI	GB
51CrV4 / 1.8159	SUP10	6150	50CrVA

Typical Applications

Valve Springs

Valve-spring components may consider chromium-vanadium grades, but fatigue and temperature performance must be validated for the finished geometry, heat treatment and duty cycle.

Suspension Springs

Automotive leaf springs and coil springs. Excellent sag resistance and fatigue strength at 45-52 HRC working hardness.

Torsion Bars

Torsion bars and stabilizer bars for automotive chassis. High elastic limit and consistent mechanical properties across full cross-section.

How to Specify 51CrV4 Strip

State 51CrV4 or the accepted equivalent standard
Provide thickness, width and dimensional tolerance
Choose the required delivery condition and surface finish
Describe the spring component, edge and testing requirements
Include order quantity and destination for quotation review

Technical Resources

Compare 65Mn vs 51CrV4, use our spring steel selection guide, or review the steel strip RFQ checklist.

Need 51CrV4 in a specific thickness or condition?
Send your grade, dimensions, condition, quantity and destination. We will review feasibility and prepare a formal quotation after confirming the order requirements.

Request 51CrV4 Quote

51CrV4 Steel Strip