Steel 54SiCrV6
EN 54SiCrV6
54SiCrV6 (1.8152, also listed as 55SiCrV) is a medium-carbon silicon-chromium-vanadium spring steel in the EN 10083 family, combining a high elastic limit from silicon with vanadium grain refinement for toughness.
Reference datasheet — 54SiCrV6 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +QT condition
54SiCrV6 tempers and conditions
54SiCrV6 is supplied in 8 conditions, soft to hard. +QT is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Softest, most ductile delivery state — pick for heavy cold upsetting, deep drawing or cold extrusion before hardening. | 420 | 700 | 20 | 210 HB | — |
Treated for high shearability | Pick when bar/coil must be cold sheared or cropped to blanks without cracking prior to hardening. | 440 | 750 | 18 | 19 HRC | 7 % IACS |
Annealed | Choose for cold forming, machining or coiling of bar/flat before final hardening. | 460 | 780 | 16 | 230 HB | — |
Cold drawn | Pick for close dimensional tolerance and bright surface on bar destined for machining and subsequent hardening. | 850 | 1,000 | 8 | 31 HRC | 6.8 % IACS |
Supplied with guaranteed core hardenability / core hardness band | Order when the finished part must meet a specified through-thickness (core) hardness after quench and temper, e.g. thick torsion bars and heavy leaf sections. | 1,350 | 1,500 | 9 | 44 HRC | 6.2 % IACS |
+QTDefault Quenched and tempered | Standard service condition for coil, leaf and torsion springs — highest usable strength/fatigue combination. | 1,650 | 1,800 | 7 | 50 HRC | — |
Hardened | As-quenched state only — maximum hardness but brittle; must be tempered before service. | 1,800 | 2,200 | 1 | 60 HRC | — |
Oil hardened and tempered spring wire (VDSiCr, EN 10270-2) | Pick for high-duty valve springs and small coil springs supplied ready-to-coil at full strength with clean, decarb-free surface. | 1,800 | 2,000 | 5 | 54 HRC | 6 % IACS |
What is 54SiCrV6?
54SiCrV6 (1.8152, also listed as 55SiCrV) is a medium-carbon silicon-chromium-vanadium spring steel in the EN 10083 family, combining a high elastic limit from silicon with vanadium grain refinement for toughness. It is used for heavily loaded springs and is available as wire, rod and flat bar in +A, +AC, +S, +CH, +H, +QT, +C and OT-VDSiCr conditions; the default temper gives 1650 MPa yield, 1800 MPa tensile, 7 % elongation and about 50 HRC. Constraints are a 250 °C service ceiling, formability score 10, machinability 25 after hardening, and a carbon equivalent near 0.85 that makes it effectively unweldable. 45SiCrV6-2 is the lower-strength alternative; 60SiCrV7 the higher-carbon one. 54SiCrV6 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). 54SiCrV6 has a yield strength of 1,650 MPa (239 ksi) and a tensile strength of 1,800 MPa (261 ksi) — stronger than 99% of steel grades. Elongation at break is 7% and the elastic modulus is 206 GPa (29.9 Msi).
What is 54SiCrV6 used for?
- Automotive coil springs
- Torsion bars
- Railway suspension springs
- High-fatigue mechanical springs
Advantages
- High strength — 1,650 MPa (239 ksi), better than 99% of steel grades
- Polishes to a fine finish — 65/100, better than 78% of steel grades
Limitations
- Limited ductility — 7%, worse than 96% of steel grades
- Limited formability — 10/100, worse than 95% of steel grades
- Low fracture toughness — 35 MPa·√m (31.9 ksi·√in), worse than 94% of steel grades
- Difficult to machine — 25/100, worse than 93% of steel grades
- Difficult to weld — 15/100, worse than 91% of steel grades
54SiCrV6 properties
Typical room-temperature values for 54SiCrV6-+QT; bars are the position among steel grades.
Physical3
54SiCrV6 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical15
54SiCrV6 has a yield strength of 1,650 MPa (239 ksi) and a tensile strength of 1,800 MPa (261 ksi) — stronger than 99% of steel grades. Elongation at break is 7% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
54SiCrV6 is rated for continuous service to 250°C (482 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
54SiCrV6 conducts electricity at 6.2 % IACS, worse than 78% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 54SiCrV6 takes about 30 MJ of energy and emits 2.1 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability7
54SiCrV6's machinability is poor (25/100, worse than 93% of steel grades); weldability poor (15/100); formability not recommended (10/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 54SiCrV6 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 54SiCrV6
Is 54SiCrV6 easy to machine?
Machine in +A/+AC condition (carbide or coated HSS, 60–120 m/min); after Q&T at ~50 HRC only grinding or CBN hard-turning is practical.
Can 54SiCrV6 be welded?
Essentially unweldable in service condition (CE ≈ 0.85); if unavoidable, preheat 300–400 °C, low-hydrogen consumables and immediate post-weld temper — expect loss of spring properties.
Can 54SiCrV6 be formed, bent or molded?
Hot form 900–1050 °C or cold coil in annealed state; austenitize ~860–880 °C, oil quench, temper 400–480 °C for 46–52 HRC, then stress relieve after coiling.
54SiCrV6 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C | 0.51 – 0.59 | 0.55 |
| Siraises elastic limit and relaxation resistance | 1.2 – 1.6 | 1.4 |
| Mn | 0.5 – 0.8 | 0.65 |
| Crhardenability | 0.5 – 0.8 | 0.65 |
| Vgrain refinement, temper resistance | 0.1 – 0.2 | 0.15 |
| P | ≤ 0.03 | |
| S | ≤ 0.03 | |
| Fe | balance |
What surface finishes work on 54SiCrV6?
Shot peen (and preferably stress-peen) to maximize fatigue life; protect with phosphate + epoxy powder or zinc-flake; avoid electroplating or bake ≥4 h at 200 °C to prevent hydrogen embrittlement; control surface decarburization to spec.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 54SiCrV6 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.8152
- Similar grades
- 55SiCrV
How much does 54SiCrV6 cost?
54SiCrV6 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
54SiCrV6 — frequently asked
What is 54SiCrV6 used for?
54SiCrV6 is typically used for automotive coil springs, torsion bars, railway suspension springs and high-fatigue mechanical springs. In short: valve-spring quality Si-Cr-V; 1650 MPa yield at 50 HRC; effectively unweldable.
What is the yield strength of 54SiCrV6?
54SiCrV6 has a typical yield strength of 1,650 MPa (239 ksi) and a tensile strength of 1,800 MPa (261 ksi) — stronger than 99% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 54SiCrV6 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 93% of steel grades). Machine in +A/+AC condition (carbide or coated HSS, 60–120 m/min); after Q&T at ~50 HRC only grinding or CBN hard-turning is practical.
Can 54SiCrV6 be welded?
Not readily — weldability is rated poor (15/100). Essentially unweldable in service condition (CE ≈ 0.85); if unavoidable, preheat 300–400 °C, low-hydrogen consumables and immediate post-weld temper — expect loss of spring properties.
What surface finishes work on 54SiCrV6?
Shot peen (and preferably stress-peen) to maximize fatigue life; protect with phosphate + epoxy powder or zinc-flake; avoid electroplating or bake ≥4 h at 200 °C to prevent hydrogen embrittlement; control surface decarburization to spec.
Can 54SiCrV6 be formed, bent or molded?
Hot form 900–1050 °C or cold coil in annealed state; austenitize ~860–880 °C, oil quench, temper 400–480 °C for 46–52 HRC, then stress relieve after coiling.
What is the maximum service temperature of 54SiCrV6?
54SiCrV6 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 54SiCrV6 cost?
54SiCrV6 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10089 — Hot rolled steels for quenched and tempered springs — CEN (2002)
- EN 10270-2 — Steel wire for mechanical springs: oil hardened and tempered spring steel wire (VDSiCr) — CEN (2011)
- EN 10083-1 — Steels for quenching and tempering: general technical delivery conditions (delivery states +A, +AC, +S, +QT) — CEN (2006)
- GB/T 1222 — (55SiCrA / 55SiCrVA) — SAC (2016)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (spring steels) — ASM International (1990)
- EN 13906-1 — Cylindrical helical springs, design and calculation — CEN (2013)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.