Steel 33NiCrMoV14-5
EN 33NiCrMoV14-5
33NiCrMoV14-5 (1.6956) is a high-nickel Ni-Cr-Mo-V quenched and tempered alloy steel in the EN 10083/10250 forging family, developed for large, highly stressed rotating forgings.
Reference datasheet — 33NiCrMoV14-5 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 +QT condition
33NiCrMoV14-5 tempers and conditions
33NiCrMoV14-5 is supplied in 6 conditions, soft to hard. +QT 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 | Machining/rough-turning condition before final quench and temper. | 550 | 850 | 18 | 24 HRC | 6 % IACS |
Normalized and tempered | Intermediate condition for very large forgings or as pre-treatment before final Q&T. | 700 | 950 | 16 | 30 HRC | 5.7 % IACS |
Quenched and tempered, Rm 900–1100 MPa | High-tempering condition for large turbine/generator shafts where toughness and low-temperature notch behaviour dominate. | 800 | 980 | 16 | 31 HRC | — |
+QT + gas nitrided | Pick when journal/spline wear and fatigue at the surface matter; V and Cr give a hard, stable nitrided case. | 1,030 | 1,250 | 11 | 62 HRC | 5.7 % IACS |
+QTDefault Quenched and tempered | Standard commercial condition: best balance of ~1000 MPa yield with usable impact toughness in thick forgings. | 1,050 | 1,250 | 12 | 40 HRC | — |
Quenched and low-tempered, Rm 1450–1650 MPa | Maximum-strength condition for small highly loaded shafts and gears; toughness and SCC/hydrogen resistance drop sharply. | 1,350 | 1,550 | 10 | 46 HRC | — |
What is 33NiCrMoV14-5?
33NiCrMoV14-5 (1.6956) is a high-nickel Ni-Cr-Mo-V quenched and tempered alloy steel in the EN 10083/10250 forging family, developed for large, highly stressed rotating forgings. In the default +QT condition it reaches about 1050 MPa yield, 1250 MPa tensile, 12 % elongation and 375 HB (40 HRC), with service to roughly 400 °C, and is available as large bar, rotor forgings and nitrided variants. The high carbon equivalent makes it a poor welding grade and machinability is low (score 32) once hardened; 28NiCrMoV8-5 is the lower-strength, easier-to-machine alternative in the same family. 33NiCrMoV14-5 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). 33NiCrMoV14-5 has a yield strength of 1,050 MPa (152 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Elongation at break is 12% and the elastic modulus is 207 GPa (30 Msi).
What is 33NiCrMoV14-5 used for?
- Turbine shafts
- Generator rotors
- Heavy forged components
Advantages
- High strength — 1,050 MPa (152 ksi), better than 93% of steel grades
- Polishes to a fine finish — 70/100, better than 87% of steel grades
Limitations
- Difficult to machine — 32/100, worse than 87% of steel grades
- Limited ductility — 12%, worse than 84% of steel grades
- Limited formability — 18/100, worse than 84% of steel grades
- Poor heat conductor — 32 W/m·K (18.5 BTU/hr·ft·°F), worse than 82% of steel grades
- High embodied carbon — 2.5 kg CO₂/kg, worse than 82% of steel grades
33NiCrMoV14-5 properties
Typical room-temperature values for 33NiCrMoV14-5-+QT; bars are the position among steel grades.
Physical3
33NiCrMoV14-5 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).
Mechanical16
33NiCrMoV14-5 has a yield strength of 1,050 MPa (152 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Elongation at break is 12% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
33NiCrMoV14-5 is rated for continuous service to 400°C (752 °F). It conducts heat at 32 W/m·K (18.5 BTU/hr·ft·°F), worse than 82% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical2
33NiCrMoV14-5 has an electrical resistivity of 3×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of 33NiCrMoV14-5 takes about 34 MJ of energy and emits 2.5 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
33NiCrMoV14-5's machinability is poor (32/100, worse than 87% of steel grades); weldability poor (22/100); formability poor (18/100).
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. 33NiCrMoV14-5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 33NiCrMoV14-5
Is 33NiCrMoV14-5 easy to machine?
Rough machine in the annealed/normalized state; in +QT (≈40 HRC) use rigid setups, coated carbide or CBN at reduced speed and heavy coolant, and finish-grind bearing surfaces.
Can 33NiCrMoV14-5 be welded?
Poor weldability due to high carbon equivalent — preheat 250–350 °C, low-hydrogen matching or slightly softer filler, and immediate post-weld temper below the last tempering temperature.
Can 33NiCrMoV14-5 be formed, bent or molded?
Hot forge 1050–1150 °C with slow controlled cooling to avoid quench cracks; no practical cold forming, straightening only warm.
33NiCrMoV14-5 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 |
|---|---|---|
| C | 0.3 – 0.36 | 0.33 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.3 – 0.6 | 0.45 |
| Pmax; rotor forgings often ≤0.010 | ≤ 0.02 | 0.01 |
| Smax; low-S practice for toughness | ≤ 0.02 | 0.01 |
| Cr | 1.1 – 1.4 | 1.25 |
| Mo | 0.3 – 0.5 | 0.4 |
| Ni | 3.3 – 3.8 | 3.5 |
| V | 0.08 – 0.15 | 0.1 |
| Fe | balance |
What surface finishes work on 33NiCrMoV14-5?
Not corrosion resistant: use phosphating, oil, paint, Zn/Ni or hard-chrome plating; gas nitriding gives an excellent wear/fatigue surface, and the fine tempered martensite polishes well.
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 33NiCrMoV14-5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.6956
How much does 33NiCrMoV14-5 cost?
33NiCrMoV14-5 is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
33NiCrMoV14-5 — frequently asked
What is 33NiCrMoV14-5 used for?
33NiCrMoV14-5 is typically used for turbine shafts, generator rotors and heavy forged components. In short: 1250 MPa forging grade; deep-hardening rotor steel; nitrides for wear surfaces.
What is the yield strength of 33NiCrMoV14-5?
33NiCrMoV14-5 has a typical yield strength of 1,050 MPa (152 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 33NiCrMoV14-5 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 87% of steel grades). Rough machine in the annealed/normalized state; in +QT (≈40 HRC) use rigid setups, coated carbide or CBN at reduced speed and heavy coolant, and finish-grind bearing surfaces.
Can 33NiCrMoV14-5 be welded?
Not readily — weldability is rated poor (22/100). Poor weldability due to high carbon equivalent — preheat 250–350 °C, low-hydrogen matching or slightly softer filler, and immediate post-weld temper below the last tempering temperature.
What surface finishes work on 33NiCrMoV14-5?
Not corrosion resistant: use phosphating, oil, paint, Zn/Ni or hard-chrome plating; gas nitriding gives an excellent wear/fatigue surface, and the fine tempered martensite polishes well.
Can 33NiCrMoV14-5 be formed, bent or molded?
Hot forge 1050–1150 °C with slow controlled cooling to avoid quench cracks; no practical cold forming, straightening only warm.
What is the maximum service temperature of 33NiCrMoV14-5?
33NiCrMoV14-5 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 33NiCrMoV14-5 cost?
33NiCrMoV14-5 is a premium-cost steel ($$$), cheaper than about 51% 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 10250-3 Open die steel forgings for general engineering purposes — Alloy special steels — CEN (2000)
- SEW 555 / Stahl-Eisen-Werkstoffblatt for Ni-Cr-Mo-V forging steels — Verlag Stahleisen (1998)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19: Fatigue and Fracture (rotor and shaft steels) — ASM International (1996)
- ISO 18265 Metallic materials — Conversion of hardness values — ISO (2013)
- Heavy forging / rotor shaft steel datasheets (1.6956 class) — European special-steel forging producers (2022)
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.