Steel 15MnMoV4-5
EN 15MnMoV4-5
15MnMoV4-5 (1.5402) is a low-alloy manganese-molybdenum-vanadium steel for pressure-retaining parts, where the Mo-V addition holds strength at temperature.
Reference datasheet — 15MnMoV4-5 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 +NT condition
15MnMoV4-5 tempers and conditions
15MnMoV4-5 is supplied in 6 conditions, soft to hard. +NT is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum machinability and cold formability before final heat treatment. | 330 | 540 | 26 | 160 HB | 7.8 % IACS |
Hot rolled | Lowest-cost supply for parts that will be re-heat-treated after forming or machining. | 420 | 620 | 20 | 190 HB | 7.5 % IACS |
Normalized | Pick for uniform fine-grained plate/forging with good toughness where the highest strength is not required. | 430 | 610 | 22 | 185 HB | — |
Stress relieved | Order when the vessel will see a long post-weld heat treatment and design values must reflect the softened condition. | 440 | 610 | 21 | 185 HB | 7.5 % IACS |
+NTDefault Normalized and tempered | Standard stocked condition for pressure-vessel plate: balanced strength, toughness and elevated-temperature stability. | 460 | 640 | 20 | 195 HB | — |
Quenched and tempered | Pick for heavy sections or forgings needing the highest yield strength and through-thickness toughness. | 550 | 720 | 18 | 21 HRC | — |
What is 15MnMoV4-5?
15MnMoV4-5 (1.5402) is a low-alloy manganese-molybdenum-vanadium steel for pressure-retaining parts, where the Mo-V addition holds strength at temperature. Typical normalized-and-tempered properties are about 460 MPa yield, 640 MPa tensile, 20 % elongation and 195 HB, with service up to 480 °C; it is used mainly as plate, forged flanges and piping components. It is weldable with low-hydrogen practice, but needs preheat and 600-680 °C post-weld heat treatment, and it has no inherent corrosion resistance so coatings or cladding are required. 16Mo3 is the nearest lower-strength alternative and 13CrMo4-5 the usual step up for creep service. 15MnMoV4-5 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). 15MnMoV4-5 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 55% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
What is 15MnMoV4-5 used for?
- pressure vessels
- boiler components
- piping
Advantages
- High service temperature — 480°C (896 °F), better than 88% of steel grades
15MnMoV4-5 properties
Typical room-temperature values for 15MnMoV4-5-+NT; bars are the position among steel grades.
Physical3
15MnMoV4-5 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical16
15MnMoV4-5 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 55% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
15MnMoV4-5 is rated for continuous service to 480°C (896 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
15MnMoV4-5 conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 15MnMoV4-5 takes about 31 MJ of energy and emits 2.2 kg of CO₂ — more than 64% of steel grades. Typical recycled content is 25%.
Manufacturability7
15MnMoV4-5's machinability is good (55/100, better than 62% of steel grades); weldability good (55/100); formability fair (50/100).
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. 15MnMoV4-5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 15MnMoV4-5
Is 15MnMoV4-5 easy to machine?
Machines like a 500–650 MPa alloy steel: rigid setups, coated carbide, 80–140 m/min turning; vanadium carbides accelerate edge wear so keep feeds up and avoid dwelling.
Can 15MnMoV4-5 be welded?
Weldable by SMAW/SAW/GTAW with matching Mn-Mo(-V) or 1.25Cr-0.5Mo consumables; preheat ~150–250 °C depending on thickness, low-hydrogen practice, and 600–680 °C PWHT to restore toughness and avoid reheat cracking.
Can 15MnMoV4-5 be formed, bent or molded?
Hot form at 950–1150 °C followed by re-normalizing/tempering; cold bending is possible in the annealed or +NT state with generous bend radii (≥3t) and no flame straightening.
15MnMoV4-5 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 |
|---|---|---|
| Cdesignation digit 15 = 0.15 % C | 0.12 – 0.18 | 0.15 |
| Si | 0.15 – 0.4 | 0.3 |
| Mndesignation 4/4 = 1.0 % Mn | 0.85 – 1.2 | 1 |
| P | ≤ 0.03 | |
| S | ≤ 0.02 | |
| Modesignation 5/10 = 0.5 % Mo | 0.4 – 0.55 | 0.5 |
| Vmicroalloy precipitation strengthener | 0.06 – 0.12 | 0.09 |
| Crresidual | ≤ 0.3 | |
| Niresidual | ≤ 0.3 | |
| Curesidual | ≤ 0.3 | |
| Algrain refining, total Al | 0.02 – 0.06 | 0.03 |
| Fe | balance |
What surface finishes work on 15MnMoV4-5?
No inherent corrosion resistance — shot blast then epoxy/zinc-rich primer, aluminizing or weld-overlay cladding; electroplating requires post-bake to avoid hydrogen embrittlement in Q&T condition.
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 15MnMoV4-5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.5402
How much does 15MnMoV4-5 cost?
15MnMoV4-5 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
15MnMoV4-5 — frequently asked
What is 15MnMoV4-5 used for?
15MnMoV4-5 is typically used for pressure vessels, boiler components and piping. In short: elevated-temperature pressure steel; weldable with 600-680 °C PWHT; 480 °C service limit.
What is the yield strength of 15MnMoV4-5?
15MnMoV4-5 has a typical yield strength of 460 MPa (66.7 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 55% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 15MnMoV4-5 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines like a 500–650 MPa alloy steel: rigid setups, coated carbide, 80–140 m/min turning; vanadium carbides accelerate edge wear so keep feeds up and avoid dwelling.
Can 15MnMoV4-5 be welded?
Yes — weldability is rated good (55/100). Weldable by SMAW/SAW/GTAW with matching Mn-Mo(-V) or 1.25Cr-0.5Mo consumables; preheat ~150–250 °C depending on thickness, low-hydrogen practice, and 600–680 °C PWHT to restore toughness and avoid reheat cracking.
What surface finishes work on 15MnMoV4-5?
No inherent corrosion resistance — shot blast then epoxy/zinc-rich primer, aluminizing or weld-overlay cladding; electroplating requires post-bake to avoid hydrogen embrittlement in Q&T condition.
Can 15MnMoV4-5 be formed, bent or molded?
Hot form at 950–1150 °C followed by re-normalizing/tempering; cold bending is possible in the annealed or +NT state with generous bend radii (≥3t) and no flame straightening.
What is the maximum service temperature of 15MnMoV4-5?
15MnMoV4-5 is rated for continuous use to about 480°C (896 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 15MnMoV4-5 cost?
15MnMoV4-5 is a budget-cost steel ($), 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 10028-2 Flat products made of steels for pressure purposes — Non-alloy and alloy steels with specified elevated temperature properties — CEN (2017)
- EN 10027-1/10027-2 Designation systems for steels (name and material number 1.5402) — CEN (2016)
- EN 10083-3 Steels for quenching and tempering — Alloy steels — CEN (2006)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- EN 1011-2 Welding — Recommendations for welding of metallic materials: Arc welding of ferritic steels — CEN (2001)
- Mysteel / SMM (2026)
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.