Steel 80MoCrV42-16
EN 80MoCrV42-16 · UNS T11350 · AISI/SAE M50 · GB Cr4Mo4V
A secondary-hardening Mo-Cr-V steel (European equivalent of AISI M50) providing retained hardness and rolling-contact fatigue resistance at elevated temperatures, used in high-speed aerospace bearings.
Reference datasheet — 80MoCrV42-16 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 A condition
80MoCrV42-16 tempers and conditions
80MoCrV42-16 is supplied in 7 conditions, soft to hard. A is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Standard stock condition for machining before hardening; soft, ≤255 HB. | 500 | 830 | 16 | 235 HB | — |
Cold drawn, annealed | Small-diameter annealed bar with improved size tolerance and surface for direct machining. | 620 | 880 | 12 | 24 HRC | 2.9 % IACS |
QT 58-60 HRC | Choose when fracture toughness and shock resistance matter more than peak wear life. | 1,900 | 2,200 | 2 | 59 HRC | — |
QT 60-62 HRC | Normal aerospace bearing race/ball condition: austenitize ~1100 °C, quench, triple temper ~540 °C. | 2,050 | 2,400 | 1.5 | 61 HRC | — |
Vacuum induction melted + vacuum arc remelted | Melt-quality designation required for aero-engine mainshaft bearings; supplied annealed, then hardened by the user. | 2,050 | 2,400 | 2 | 62 HRC | 2.7 % IACS |
QT + deep cryogenic treatment | Adds a −73 °C (or −196 °C) sub-zero step between tempers to transform retained austenite for precision bearing dimensional stability. | 2,100 | 2,450 | 1.5 | 62 HRC | 2.6 % IACS |
QT 62-64 HRC | Maximum wear resistance for tooling and high-load raceways; lowest toughness. | 2,150 | 2,550 | 1 | 63 HRC | — |
What is 80MoCrV42-16?
A secondary-hardening Mo-Cr-V steel (European equivalent of AISI M50) providing retained hardness and rolling-contact fatigue resistance at elevated temperatures, used in high-speed aerospace bearings. 80MoCrV42-16 has a density of 7.97 g/cm³ (0.288 lb/in³), heavier than 94% of steel grades. It melts at 1,420°C (2,588 °F). 80MoCrV42-16 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 63% of steel grades. Elongation at break is 16% and the elastic modulus is 200 GPa (29 Msi).
What is 80MoCrV42-16 used for?
- Jet engine main-shaft bearings
- Turbocharger bearings
- High-speed spindle bearings
- Gas turbine bearings
Advantages
- Polishes to a fine finish — 85/100, better than 99% of steel grades
Limitations
- Difficult to weld — 12/100, worse than 96% of steel grades
- Low electrical conductivity — 2.9 % IACS, worse than 93% of steel grades
- High embodied carbon — 3 kg CO₂/kg, worse than 91% of steel grades
- Poor heat conductor — 24 W/m·K (13.9 BTU/hr·ft·°F), worse than 90% of steel grades
- Difficult to machine — 30/100, worse than 89% of steel grades
80MoCrV42-16 properties
Typical room-temperature values for 80MoCrV42-16-A; bars are the position among steel grades.
Physical3
80MoCrV42-16 has a density of 7.97 g/cm³ (0.288 lb/in³), heavier than 94% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical15
80MoCrV42-16 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 63% of steel grades. Elongation at break is 16% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
80MoCrV42-16 is rated for continuous service to 250°C (482 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), worse than 90% of steel grades. Thermal expansion is 11.3 µm/m·K (6.28 µin/in·°F).
Electrical3
80MoCrV42-16 conducts electricity at 2.9 % IACS, worse than 93% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of 80MoCrV42-16 takes about 42 MJ of energy and emits 3 kg of CO₂ — more than 92% of steel grades. Typical recycled content is 20%.
Manufacturability7
80MoCrV42-16's machinability is poor (30/100, worse than 89% of steel grades); weldability not recommended (12/100); formability poor (15/100).
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. 80MoCrV42-16 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 80MoCrV42-16
Is 80MoCrV42-16 easy to machine?
Machine only in the annealed (≤255 HB) condition with rigid setups, coated carbide or cobalt HSS at modest speeds; after hardening to 60+ HRC use CBN grinding or hard turning with CBN and light stock removal.
Can 80MoCrV42-16 be welded?
Essentially non-weldable for structural joints — high carbon and air-hardening response cause cracking; if repair is unavoidable use matching filler, 300–450 °C preheat and immediate re-temper.
Can 80MoCrV42-16 be formed, bent or molded?
Hot forge 1050–1150 °C, stop above 900 °C and slow-cool followed by spheroidize anneal at ~870 °C; no meaningful cold forming.
80MoCrV42-16 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 | 0.77 – 0.85 | 0.8 |
| Si | ≤ 0.25 | 0.15 |
| Mn | 0.15 – 0.35 | 0.25 |
| PAMS 6491 premium melt | ≤ 0.02 | |
| SAMS 6491 premium melt | ≤ 0.01 | |
| Cr | 3.75 – 4.25 | 4 |
| Mo | 4 – 4.5 | 4.25 |
| V | 0.9 – 1.1 | 1 |
| Niresidual | ≤ 0.15 | |
| Curesidual | ≤ 0.1 | |
| Wresidual | ≤ 0.25 | |
| Coresidual | ≤ 0.25 | |
| Fe | balance |
What surface finishes work on 80MoCrV42-16?
Not anodizable; protect with black oxide, phosphate, thin dense chrome or DLC/silver plating, and keep oil-filmed — bearing raceways are typically finish-ground and honed to Ra <0.05 µm.
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 80MoCrV42-16 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- T11350
- AISI / SAE
- M50
- EN / DIN / Werkstoff-Nr.
- 1.3551
- GB (China)
- Cr4Mo4V
How much does 80MoCrV42-16 cost?
80MoCrV42-16 is a high-cost steel ($$$$), pricier than about 78% 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.
80MoCrV42-16 — frequently asked
What is 80MoCrV42-16 used for?
80MoCrV42-16 is typically used for jet engine main-shaft bearings, turbocharger bearings, high-speed spindle bearings and gas turbine bearings. In short: aerospace high-speed bearing steel; secondary hardening retains hardness; hard-turn or grind after heat treat.
What is the yield strength of 80MoCrV42-16?
80MoCrV42-16 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 80MoCrV42-16 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 89% of steel grades). Machine only in the annealed (≤255 HB) condition with rigid setups, coated carbide or cobalt HSS at modest speeds; after hardening to 60+ HRC use CBN grinding or hard turning with CBN and light stock removal.
Can 80MoCrV42-16 be welded?
Not readily — weldability is rated not recommended (12/100). Essentially non-weldable for structural joints — high carbon and air-hardening response cause cracking; if repair is unavoidable use matching filler, 300–450 °C preheat and immediate re-temper.
What surface finishes work on 80MoCrV42-16?
Not anodizable; protect with black oxide, phosphate, thin dense chrome or DLC/silver plating, and keep oil-filmed — bearing raceways are typically finish-ground and honed to Ra <0.05 µm.
Can 80MoCrV42-16 be formed, bent or molded?
Hot forge 1050–1150 °C, stop above 900 °C and slow-cool followed by spheroidize anneal at ~870 °C; no meaningful cold forming.
What is the maximum service temperature of 80MoCrV42-16?
80MoCrV42-16 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.
What is the difference between 80MoCrV42-16-A and 80MoCrV42-16-QT62?
A is the default condition — standard stock condition for machining before hardening; soft, ≤255 HB. QT62: maximum wear resistance for tooling and high-load raceways; lowest toughness. Yield strength is 500 MPa in A versus 2,150 MPa in QT62.
How much does 80MoCrV42-16 cost?
80MoCrV42-16 is a high-cost steel ($$$$), pricier than about 78% 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
- AMS 6491 — Steel Bars, Forgings, Tubing 4.1Cr-4.2Mo-1.0V, Premium Aircraft-Quality (M50) — SAE International (2019)
- EN ISO 683-17 / DIN 17230 rolling bearing steels (80MoCrV42-16, 1.3551) — CEN / DIN (2014)
- GB/T 38885 (Cr4Mo4V / 8Cr4Mo4V) — SAC (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Lescalloy M50 VIM-VAR bearing steel datasheet — Latrobe/Carpenter Technology (2020)
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.