Steel 16NiCrMo16-5
EN 16NiCrMo16-5
16NiCrMo16-5 (1.3532, AISI 9310 equivalent) is a high-nickel Ni-Cr-Mo case-hardening steel in the EN 10084 family, alloyed for deep hardenability and high core toughness in heavily loaded carburized bearings and gears.
Reference datasheet — 16NiCrMo16-5 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 +AC condition
16NiCrMo16-5 tempers and conditions
16NiCrMo16-5 is supplied in 9 conditions, soft to hard. +AC is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ACDefault Spheroidize annealed | Standard stock condition for bar and tube: softest, best for deep machining, cold extrusion and pre-carburizing turning. | 400 | 620 | 20 | 200 HB | — |
Supplied to a specified hardenability (Jominy) band | Order this when the carburizing shop must guarantee core hardness in thick rings/gears; bar is delivered soft (+A/+AC) but with a certified end-quench band. | 410 | 630 | 19 | 42 HRC | 6 % IACS |
Treated to a specified hardness range | Bar delivered inside a contract hardness window (typically 179–229 HB) for automatic-machining lines with tight tool-life control. | 415 | 640 | 18 | 15 HRC | 6 % IACS |
Annealed | General soft-annealed delivery for forging stock and rough-machined blanks where full spheroidization is not required. | 420 | 650 | 18 | 16 HRC | 6 % IACS |
Treated for improved shearability | Pick when bar is cold-sheared into slugs for forging or cold-formed rings; structure tuned for clean shear faces without cracking. | 430 | 660 | 17 | 17 HRC | 6 % IACS |
Normalized | Used after hot forging to homogenize grain size before final annealing and carburizing; harder and less machinable than +AC. | 540 | 800 | 15 | 23 HRC | — |
Cold drawn | Choose for close-tolerance bright bar and small pins/rollers machined on sliding-head lathes; higher strength, lower ductility, residual stresses present. | 650 | 820 | 10 | 24 HRC | 6 % IACS |
Carburized, hardened and low-temperature tempered | The in-service condition for bearing rings, rollers and gears: hard wear-resistant case over a strong, impact-tolerant nickel-alloy core. | 1,000 | 1,250 | 12 | 60 HRC | — |
Direct quenched + tempered ~200 °C | Reference condition for core-property verification and for uncarburized shafts/pins made from the same heat. | 1,050 | 1,300 | 11 | 40 HRC | — |
What is 16NiCrMo16-5?
16NiCrMo16-5 (1.3532, AISI 9310 equivalent) is a high-nickel Ni-Cr-Mo case-hardening steel in the EN 10084 family, alloyed for deep hardenability and high core toughness in heavily loaded carburized bearings and gears. It is specified for aerospace and gearbox bearing rings and heavy-duty carburized gears, in bar and forging stock supplied annealed (+AC, +A) through +N, +TH and +C, or carburized and quench-tempered. Core values are about 400 MPa yield, 620 MPa tensile, 20% elongation and 200 HB, with service to roughly 400 °C. Machinability (45) and weldability (25) are low and corrosion resistance is nil; 18NiCrMo14-6 is the nearest alternative. 16NiCrMo16-5 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). 16NiCrMo16-5 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 60% of steel grades. Elongation at break is 20% and the elastic modulus is 207 GPa (30 Msi).
What is 16NiCrMo16-5 used for?
- Aerospace and gearbox bearing rings
- Heavy-duty carburized gears
- Helicopter and turbine accessory drive gears
- Planet pinions and gear shafts
- High-load spline shafts
- Aircraft bearing races
- Rolling elements for high-load bearings
Advantages
- Polishes to a fine finish — 80/100, better than 97% of steel grades
Limitations
- Low electrical conductivity — 6 % IACS, worse than 78% of steel grades
- Poor heat conductor — 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
16NiCrMo16-5 properties
Typical room-temperature values for 16NiCrMo16-5-+AC; bars are the position among steel grades.
Physical3
16NiCrMo16-5 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical14
16NiCrMo16-5 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 60% of steel grades. Elongation at break is 20% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
16NiCrMo16-5 is rated for continuous service to 400°C (752 °F). It conducts heat at 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical3
16NiCrMo16-5 conducts electricity at 6 % 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 16NiCrMo16-5 takes about 33 MJ of energy and emits 2.4 kg of CO₂ — more than 76% of steel grades. Typical recycled content is 25%.
Manufacturability8
16NiCrMo16-5's machinability is fair (45/100, worse than 65% of steel grades); weldability poor (25/100); formability good (60/100).
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. 16NiCrMo16-5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 16NiCrMo16-5
Is 16NiCrMo16-5 easy to machine?
Machine in the +AC spheroidized state with sharp, positive-rake carbide and generous coolant — the tough nickel matrix work-hardens and produces stringy chips; finish-grind after carburizing.
Can 16NiCrMo16-5 be welded?
Essentially a non-welding grade: high carbon-equivalent demands 250–350 °C preheat, low-hydrogen or matching Ni-Cr-Mo filler and immediate stress relief; never weld carburized surfaces.
Can 16NiCrMo16-5 be formed, bent or molded?
Hot forge 1100–1180 °C with slow cooling and post-forge normalize + spheroidize anneal; cold extrusion/upsetting only from the +AC or +S condition with phosphate-soap lubrication.
16NiCrMo16-5 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 | 0.13 – 0.19 | 0.16 |
| Sisome bearing specifications restrict to ≤0.30 | ≤ 0.4 | 0.25 |
| Mn | 0.3 – 0.6 | 0.45 |
| Pbearing quality often ≤0.020 | ≤ 0.03 | |
| Slow-S for cleanliness / fatigue life | ≤ 0.02 | |
| Cr | 1.1 – 1.4 | 1.25 |
| Mo | 0.2 – 0.35 | 0.28 |
| Ni | 3.8 – 4.3 | 4.05 |
| Curesidual | ≤ 0.3 | |
| Ovacuum-degassed bearing quality, 15 ppm max typical | ≤ 0 | |
| Fe | balance |
What surface finishes work on 16NiCrMo16-5?
Not anodizable; protect with oil, black oxide or manganese phosphate, and superfinish/hone raceways to Ra ≤0.05 µm — avoid electroplating without baking due to hydrogen-embrittlement risk in the hard case.
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 16NiCrMo16-5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.3532
- Similar grades
- 9310
How much does 16NiCrMo16-5 cost?
16NiCrMo16-5 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.
16NiCrMo16-5 — frequently asked
What is 16NiCrMo16-5 used for?
16NiCrMo16-5 is typically used for aerospace and gearbox bearing rings, heavy-duty carburized gears, helicopter and turbine accessory drive gears, planet pinions and gear shafts, high-load spline shafts and aircraft bearing races. In short: deepest-hardening case grade; aerospace 9310 equivalent; highest core toughness.
What is the yield strength of 16NiCrMo16-5?
16NiCrMo16-5 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 60% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is 16NiCrMo16-5 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the +AC spheroidized state with sharp, positive-rake carbide and generous coolant — the tough nickel matrix work-hardens and produces stringy chips; finish-grind after carburizing.
Can 16NiCrMo16-5 be welded?
Not readily — weldability is rated poor (25/100). Essentially a non-welding grade: high carbon-equivalent demands 250–350 °C preheat, low-hydrogen or matching Ni-Cr-Mo filler and immediate stress relief; never weld carburized surfaces.
What surface finishes work on 16NiCrMo16-5?
Not anodizable; protect with oil, black oxide or manganese phosphate, and superfinish/hone raceways to Ra ≤0.05 µm — avoid electroplating without baking due to hydrogen-embrittlement risk in the hard case.
Can 16NiCrMo16-5 be formed, bent or molded?
Hot forge 1100–1180 °C with slow cooling and post-forge normalize + spheroidize anneal; cold extrusion/upsetting only from the +AC or +S condition with phosphate-soap lubrication.
What is the maximum service temperature of 16NiCrMo16-5?
16NiCrMo16-5 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.
What is the difference between 16NiCrMo16-5 +AC and 16NiCrMo16-5-QT200?
+AC is the default condition — standard stock condition for bar and tube: softest, best for deep machining, cold extrusion and pre-carburizing turning. QT200: reference condition for core-property verification and for uncarburized shafts/pins made from the same heat. Yield strength is 400 MPa in +AC versus 1,050 MPa in QT200.
How much does 16NiCrMo16-5 cost?
16NiCrMo16-5 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
- ISO 683-17 — Heat-treatable steels, alloy steels: ball and roller bearing steels — ISO (2014)
- EN 10084 — Case hardening steels: technical delivery conditions — CEN (2008)
- EN 10027-2 / Werkstoff 1.3532 designation — CEN (2015)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 4 — Heat Treating (carburizing of Ni-Cr-Mo steels) — ASM International (1991)
- MMPDS typical properties for AISI 9310 carburized steel — Battelle/FAA (2021)
- Case-hardening bearing steel bar datasheets (Ovako / Böhler / Aubert & Duval equivalents) — various producers (2023)
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.