Description: BBN steel is a well-known steel manufacturer and service provider in China, EN 10083-3 51CrV4 Alloy Steel Plate is our superior product, we are favored by customers with high quality, competitive price and excellent service
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Ultra-High Strength51CrV4 delivers tensile strength 1100–1300 MPa after quenching and tempering, ideal for high-load springs and components.
Superior Fatigue ResistanceExcellent fatigue and endurance limit, specially engineered for cyclic-load springs and transmission parts.
Spring Steel GradeCompliant with EN 10089 & EN 10083-3; the vanadium addition refines grain and boosts toughness and stability.
01Product Overview & Specifications
EN 10083-3 51CrV4 is a high-strength quenched and tempered spring alloy steel, compliant with EN 10089 (spring steels) and EN 10083-3 (heat-treatable steels). With ultra-high tensile strength, excellent fatigue resistance and stable toughness after heat treatment, it is engineered for heavy-duty industrial springs and high-load mechanical components.
We supply 51CrV4 as plates, bars, profiles and forgings with customized thermo-mechanical processing and full-range inspection, meeting diverse high-precision equipment manufacturing requirements.
Item
Specification
Executive Standard
EN 10089 & EN 10083-3 — Spring steels & heat-treatable alloy steels
Steel Grade
51CrV4 — vanadium-alloyed spring steel
Steel Number
1.8159
Steel Category
High-Strength Quenched & Tempered Spring Alloy Steel
Grade Feature
Vanadium addition for ultra-high strength, fatigue resistance and toughness
Mill Test Certificate (MTC), EN 10204 3.1 / 3.2, SGS third-party test report
Processing Services
Customized heat treatment, cutting, machining and complete certification documents
02Equivalent International Steel Grades
51CrV4 (1.8159) has mature equivalent grades in global mainstream standard systems, featuring similar chemical composition, hardenability and mechanical performance for seamless cross-standard substitution.
Standard System
Equivalent Grade
EN 10083-3 / EN 10089 (EU)
51CrV41.8159
ASTM / AISI / SAE (USA)
6150
JIS (Japan)
SUP9SUP10
BS (UK)
735A51
AFNOR (France)
51CrV4
GB (China)
50CrVA
GOST (Russia)
50ChFA
Note: Equivalent grades share the ~0.51% C and Cr-V alloying concept with comparable hardenability and fatigue performance, yet differ in impurity limits, testing and certification. For design-critical springs, verify detailed specifications before substitution. BBN technical team can assist with grade matching.
03Grade Designation & Meaning
The DIN / EN designation 51CrV4 encodes the carbon level, alloying elements and grade index of this spring steel.
51
51 — Carbon Content
Indicates a mean carbon content of approximately 0.51% (100 × C%) for high strength and hardenability.
Cr
Cr — Chromium
Chromium improves hardenability, hardness and wear resistance of the heat-treated steel.
V
V — Vanadium
Vanadium refines the grain, raises fatigue resistance and toughness — the key differentiator of this spring steel (absent in plain Cr grades).
4
4 — Grade Index
Sequence / quality index within the DIN heat-treatable steel family, distinguishing it from other Cr-V grades.
51CrV4 vs 50CrMo4: Both are ~0.50% carbon heat-treatable alloy steels, but 51CrV4 is vanadium-alloyed (no molybdenum) and tuned for spring & fatigue service, delivering ultra-high tensile strength with stable toughness.
04Chemical Composition
Cast analysis limits of 51CrV4 per EN 10083-3 (values in %, unless a range is given).
Element
Content (%)
C (Carbon)
0.47 – 0.55
Si (Silicon)
0.40 max
Mn (Manganese)
0.70 – 1.10
P (Phosphorus)
0.025 max
S (Sulfur)
0.025 max
Cr (Chromium)
0.90 – 1.20
V (Vanadium)
0.10 – 0.25
Note: Values above are cast-analysis limits per EN 10083-3. Chromium and vanadium provide the hardenability and fatigue strength that distinguish 51CrV4 from plain-carbon grades. The exact heat analysis of each batch is stated in its Mill Test Certificate (MTC).
05Mechanical Properties & Heat Treatment
Typical mechanical properties of 51CrV4 in the quenched and tempered condition (reference values per EN 10083-3; actual results depend on section size and heat-treatment parameters).
900 MPaMin. Yield Rp0.2Quenched & tempered
1100–1300 MPaMin. Tensile RmQuenched & tempered
12%Elongation AMin. elongation
Mechanical properties of 51CrV4:
Grade
Yield Rp0.2 (MPa, min)
Tensile Rm (MPa, min)
Elongation A (%)
51CrV4
900
1100 – 1300
12
Note: 51CrV4 is a heat-treatable steel supplied in a soft condition; the mechanical values above are achieved after quenching and tempering (Q+T) and vary with section thickness and treatment. Impact requirements are specified per project; for low-temperature or dynamic-load service, confirm toughness in the MTC.
+Heat Treatment, Processing & Testing Conditions
We provide diversified customized heat-treatment processes and full-range inspection services for 51CrV4 to meet high-standard industrial, aerospace and petroleum equipment manufacturing requirements.
Processing Condition
Description
AR (As Hot Rolled)
As-rolled condition, supplied without further heat treatment
TMCP
Thermal Mechanical Control Processing for controlled microstructure
N (Normalized)
Normalized for uniform fine-grain structure
Q+T (Quenched & Tempered)
Quenching + tempering, the standard route to reach 1100–1300 MPa tensile
PWHT
Simulated Post-Weld Heat Treatment for welded components
Testing & Inspection
Scope
UT
Ultrasonic Examination for internal soundness
Z Direction Test
Z15 / Z25 / Z35 through-thickness properties
Charpy V-Notch
Impact test at specified temperature
HIC & NDT
HIC test and non-destructive testing
NACE 0175
Corrosion test for sour-service environments
Third-party Test
SGS and other independent inspection available
Surface Treatment: Coated, Shot Blasting & Painting available; full factory inspection with official reports on request.
06Applications, Product Forms & Service
With ultra-high strength, excellent fatigue resistance and stable thermal performance, 51CrV4 is widely applied in aerospace, mechanical equipment, precision transmission and heavy-load structural manufacturing.
1
Aerospace Industry
Aircraft landing gear, solid rocket engine shells and high-strength structural parts under extreme load.
2
Mechanical Transmission
High-strength shafts, gears, bearings and heavy-load transmission components.
3
Spring Manufacturing
Various quenched and tempered high-strength industrial springs for cyclic-load service.
4
Alloy Steel Plate
Hot-rolled plates 3–500 mm for heavy-duty and spring-related structural parts.
5
Bar
Round and flat bars for shafts, springs and fasteners; uniform properties after Q+T.
6
Profiles & Forgings
Profiles and forgings for landing gear, gears and high-load transmission parts.
1
Fast Delivery
Stock plates, bars and forgings with prompt delivery; flexible MOQ from 1 ton.
2
Custom Heat Treatment
Q+T, normalizing and TMCP per your drawings and mechanical requirements.
3
MTC & SGS Inspection
EN 10204 3.1 / 3.2 MTC and SGS third-party inspection for every order.
4
Tech Consultation
Grade matching and processing advice replied within 24 hours by email or phone.
Full-spec 51CrV4 plates, bars, profiles, forgings in 3–500 mm thickness, 1000–4000 mm width
Spring alloy steel, 1.8159, EN 10089 & EN 10083-3, quenched & tempered for ultra-high strength
Customized heat treatment (AR / TMCP / N / Q+T / PWHT) and machining services
EN 10204 3.1 / 3.2 MTC, SGS third-party test and complete certification
Get Your EN 10083-3 51CrV4 Steel Quotation Now
Send us your product form (plate / bar / forging / profile), dimensions (thickness × width × length or diameter), quantity, heat-treatment and mechanical requirements. We will reply with stock status, competitive factory price, delivery time and complete certification within 24 hours.
BBN Steel has established a complete set of production and supplier management system processes to ensure the improvement of product quality and better service to users.
Production Control
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Certification & Patent
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Get in Touch
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Address: HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA
