Steel 20CrMnTi High-Temp Tempered
Heat-treated state
GB 20CrMnTi
Mill delivery softening alternative to annealing when hardness must be capped at 217 HB for machining.
Values for the High-Temp Tempered condition
Other 20CrMnTi tempers and conditions
20CrMnTi is listed in 8 conditions; see the grade overview at 20CrMnTi.
- Annealed
- Isothermal Annealed
- High-Temp Tempered
- Normalized
- Hot Rolled
- Cold Drawn
- Q&T 200C
- Carburized 58-62 HRC
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault softened for machining (≤217 HB) | Standard stock condition for bar and forgings that will be machined then carburized. | 400 | 620 | 22 | 187 HB | — |
930 °C austenitize, hold ~630 °C, air cool | Preferred pre-machining treatment for gear blanks: uniform ferrite–pearlite structure, low hardness scatter and better heat-treat dimensional stability. | 410 | 640 | 22 | 180 HB | 7.8 % IACS |
High-Temp TemperedThis page GB/T 3077 alternative delivery condition (≤217 HB) | Mill delivery softening alternative to annealing when hardness must be capped at 217 HB for machining. | 430 | 650 | 21 | 197 HB | 7.8 % IACS |
~880–920 °C, air cool | Used to refine forging structure and homogenize before final machining/carburizing; harder than annealed. | 480 | 750 | 18 | 217 HB | 7.8 % IACS |
as-rolled bar, no post-rolling heat treatment | Cheapest bar form; hardness and structure vary with section and cooling, normally re-annealed before machining. | 500 | 780 | 16 | 20 HRC | 7.8 % IACS |
cold-finished bar (annealed then drawn) | Choose for tight tolerance, bright small-diameter bar for shafts and pins with reduced machining allowance. | 650 | 780 | 10 | 22 HRC | 7.8 % IACS |
Q&T | The standard-specified property condition; also used for through-hardened small parts needing very high strength. | 930 | 1,180 | 12 | 40 HRC | — |
Carburized, quenched and low-temperature tempered | The service condition for gears, splines and shafts: hard wear-resistant case with tough core and high bending fatigue strength. | 950 | 1,200 | 10 | 60 HRC | — |
What is 20CrMnTi High-Temp Tempered?
20CrMnTi High-Temp Tempered is 20CrMnTi heat treated to High-Temp Tempered — mill delivery softening alternative to annealing when hardness must be capped at 217 HB for machining. 20CrMnTi High-Temp Tempered has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Elongation at break is 21% and the elastic modulus is 207 GPa (30 Msi). 20CrMnTi High-Temp Tempered has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,440°C (2,624 °F). Annealed is the default condition FabDigit quotes; High-Temp Tempered is available on request or by drawing note.
20CrMnTi High-Temp Tempered properties
Typical room-temperature values for 20CrMnTi High-Temp Tempered; 22 are specific to this condition. Other listed values are 20CrMnTi reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
20CrMnTi High-Temp Tempered has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,440°C (2,624 °F).
Mechanical14
20CrMnTi High-Temp Tempered has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Elongation at break is 21% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
20CrMnTi High-Temp Tempered is rated for continuous service to 350°C (662 °F). It conducts heat at 43 W/m·K (24.8 BTU/hr·ft·°F), better than 51% of steel grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical2
20CrMnTi High-Temp Tempered has an electrical resistivity of 2.2×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 20CrMnTi High-Temp Tempered takes about 29 MJ of energy and emits 2.1 kg of CO₂ — less than 53% of steel grades. Typical recycled content is 30%.
Manufacturability7
20CrMnTi High-Temp Tempered's machinability is good (56/100, better than 71% of steel grades); weldability fair (40/100); formability fair (52/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 20CrMnTi High-Temp Tempered
Is 20CrMnTi easy to machine?
Machine in the annealed or isothermally annealed condition (≤217 HB) with carbide tooling; leave grinding stock for post-carburizing distortion, since the 58–62 HRC case can only be finished by grinding or hard turning with CBN.
Can 20CrMnTi be welded?
Poor as-welded weldability due to hardenability — preheat 200–300 °C, use low-hydrogen consumables and post-weld temper; never weld carburized surfaces.
Can 20CrMnTi be formed, bent or molded?
Good hot forgeability at 1150–850 °C and acceptable cold forging/upsetting when spheroidize-annealed; avoid tight cold bends in hot-rolled or cold-drawn bar.
What surface finishes work on 20CrMnTi?
Not anodizable; protect with oil, phosphating, black oxide, zinc or nickel plating — bake after plating to avoid hydrogen embrittlement of high-hardness cases.
20CrMnTi 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 | 0.17 – 0.23 | 0.2 |
| Si | 0.17 – 0.37 | 0.27 |
| Mn | 0.8 – 1.1 | 0.95 |
| Cr | 1 – 1.3 | 1.15 |
| Tigrain-refining addition | 0.04 – 0.1 | 0.07 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Niresidual max | ≤ 0.3 | — |
| Curesidual max | ≤ 0.25 | — |
| Moresidual max | ≤ 0.15 | — |
| Fe | balance | — |
20CrMnTi High-Temp Tempered — frequently asked
What is 20CrMnTi High-Temp Tempered used for?
20CrMnTi High-Temp Tempered is typically used for gears, industrial drive shafts and pins. In short: carburizing Cr-Mn-Ti bar.
What is the yield strength of 20CrMnTi High-Temp Tempered?
20CrMnTi High-Temp Tempered has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 650 MPa (94.3 ksi) — weaker than 51% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 20CrMnTi High-Temp Tempered easy to machine?
Reasonably — machinability is rated good (56/100, better than 71% of steel grades). Machine in the annealed or isothermally annealed condition (≤217 HB) with carbide tooling; leave grinding stock for post-carburizing distortion, since the 58–62 HRC case can only be finished by grinding or hard turning with CBN.
Can 20CrMnTi High-Temp Tempered be welded?
With care — weldability is rated fair (40/100). Poor as-welded weldability due to hardenability — preheat 200–300 °C, use low-hydrogen consumables and post-weld temper; never weld carburized surfaces.
What surface finishes work on 20CrMnTi High-Temp Tempered?
Not anodizable; protect with oil, phosphating, black oxide, zinc or nickel plating — bake after plating to avoid hydrogen embrittlement of high-hardness cases.
Can 20CrMnTi High-Temp Tempered be formed, bent or molded?
Good hot forgeability at 1150–850 °C and acceptable cold forging/upsetting when spheroidize-annealed; avoid tight cold bends in hot-rolled or cold-drawn bar.
What is the maximum service temperature of 20CrMnTi High-Temp Tempered?
20CrMnTi High-Temp Tempered is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 20CrMnTi High-Temp Tempered?
Yes — 20CrMnTi High-Temp Tempered is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- GB/T 3077 Alloy structural steels (2015)
- GB/T 699 / GB/T 702 bar dimensions & delivery conditions — SAC (2016)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels — ASM International (1990)
- ASM Handbook Vol.19: Fatigue and Fracture (carburized steels) — ASM International (1996)
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.