Steel 17CrNiMo6 · temper · default condition
Steel 17CrNiMo6 Annealed
Properties of the Annealed condition, compared with the other 17CrNiMo6 tempers.
Pick the usual supply state — soft annealed bar or forgings at ≤229 HB — for rough turning and gear hobbing before carburizing and quenching to the final case hardness.
What is 17CrNiMo6 Annealed?
17CrNiMo6 Annealed is 17CrNiMo6 in the Annealed temper — pick the usual supply state — soft annealed bar or forgings at ≤229 HB — for rough turning and gear hobbing before carburizing and quenching to the final case hardness. 17CrNiMo6 Annealed has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi). 17CrNiMo6 Annealed 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).
Advantages
- Polishes to a fine finish — 65/100, better than 78% of steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 77% of steel grades
17CrNiMo6 Annealed properties
Typical room-temperature values for 17CrNiMo6 Annealed — 11 properties are specific to this condition; the rest are grade-level values shared by every 17CrNiMo6 temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
17CrNiMo6 Annealed 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).
Mechanical14
17CrNiMo6 Annealed has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
17CrNiMo6 Annealed is rated for continuous service to 300°C (572 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 68% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
17CrNiMo6 Annealed conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 17CrNiMo6 Annealed takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability8
17CrNiMo6 Annealed's machinability is fair (50/100, worse than 53% of steel grades); weldability poor (30/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 17CrNiMo6 tempers and conditions
17CrNiMo6 is also supplied in 9 other conditions. The full side-by-side table is on the 17CrNiMo6 overview.
- AnnealedDefaultPick the usual supply state — soft annealed bar or forgings at ≤229 HB — for rough turning and gear hobbing before carburizing and quenching to the final case hardness.430 MPa yield · 200 HB
- Q&T Blank Hardened <=16mmUse blank hardening and tempering without carburizing to verify core strength or to make small sections up to 16 mm at 960 MPa yield; machinability falls to about 25.960 MPa yield · 40 HRC
- Carburized 58-62 HRCChoose as the final service condition: carburized, hardened and tempered to a 58–62 HRC case over a tough core for heavy gear flank contact and tooth-root bending fatigue.900 MPa yield · 60 HRC
Working with 17CrNiMo6 Annealed
Is 17CrNiMo6 easy to machine?
In the annealed condition (≤229 HB) turn, mill and hob normally with coated carbide; after carburizing and quenching only grinding or CBN hard turning is practical.
Can 17CrNiMo6 be welded?
Poor weldability: high carbon equivalent and cold-cracking sensitivity require 250-350 °C preheat, low-hydrogen consumables and prompt post-heat for hydrogen removal; do not weld in carburized areas.
Can 17CrNiMo6 be formed, bent or molded?
Suited to hot forging and hot rolling at 1100-1250 °C, followed by normalizing or annealing; cold formability is limited to cold shearing and light upsetting/extrusion in the +S condition.
What surface finishes work on 17CrNiMo6?
Cannot be anodized. Usual route is gear grinding plus shot peening to raise root fatigue strength, then black oxide, phosphating or rust-preventive oil; non-tooth surfaces can be zinc-nickel plated or painted.
17CrNiMo6 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 |
|---|---|---|
| C0.15–0.20 per DIN 17210 (17CrNiMo6); 0.15–0.21 per EN 10084 (18CrNiMo7-6) | 0.15 – 0.21 | 0.18 |
| Si | ≤ 0.4 | 0.25 |
| Mn0.40–0.60 per old DIN 17210; 0.50–0.90 per EN 10084 | 0.4 – 0.9 | 0.65 |
| P≤0.035 per older DIN | ≤ 0.03 | — |
| Scontrolled-S variants 0.020–0.035 for machinability | ≤ 0.04 | — |
| Cr | 1.5 – 1.8 | 1.65 |
| Ni | 1.4 – 1.7 | 1.55 |
| Mo | 0.25 – 0.35 | 0.3 |
| Fe | balance | — |
17CrNiMo6 Annealed — frequently asked
What is 17CrNiMo6 Annealed used for?
17CrNiMo6 Annealed is typically used for gears, industrial drive shafts and pins. In short: premium carburizing gear steel.
What is the yield strength of 17CrNiMo6 Annealed?
17CrNiMo6 Annealed has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of steel grades. Strength varies by condition: see the 10 listed tempers.
Is 17CrNiMo6 Annealed easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). In the annealed condition (≤229 HB) turn, mill and hob normally with coated carbide; after carburizing and quenching only grinding or CBN hard turning is practical.
Can 17CrNiMo6 Annealed be welded?
Not readily — weldability is rated poor (30/100). Poor weldability: high carbon equivalent and cold-cracking sensitivity require 250-350 °C preheat, low-hydrogen consumables and prompt post-heat for hydrogen removal; do not weld in carburized areas.
What surface finishes work on 17CrNiMo6 Annealed?
Cannot be anodized. Usual route is gear grinding plus shot peening to raise root fatigue strength, then black oxide, phosphating or rust-preventive oil; non-tooth surfaces can be zinc-nickel plated or painted.
Can 17CrNiMo6 Annealed be formed, bent or molded?
Suited to hot forging and hot rolling at 1100-1250 °C, followed by normalizing or annealing; cold formability is limited to cold shearing and light upsetting/extrusion in the +S condition.
What is the maximum service temperature of 17CrNiMo6 Annealed?
17CrNiMo6 Annealed is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 17CrNiMo6 Annealed?
Yes — 17CrNiMo6 Annealed is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10084 — Case hardening steels: technical delivery conditions — CEN (2008)
- DIN 17210 (withdrawn) — Case hardening steels (17CrNiMo6) — DIN (1987)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4A — Steel Heat Treating Fundamentals (carburizing) — ASM International (2013)
- 18CrNiMo7-6 / 1.6587 gear steel datasheet — Ovako / Böhler-Deutschland (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.