Steel 20CrMoVTiB4-10 +N (Normalized)
Heat-treated state
EN 20CrMoVTiB4-10
Intermediate condition after forging, used to refine grain before final hardening.
Values for the +N condition
Other 20CrMoVTiB4-10 tempers and conditions
20CrMoVTiB4-10 is listed in 5 conditions; see the grade overview at 20CrMoVTiB4-10.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Delivery condition for bar that will be machined or hot-formed before final quench-and-temper. | 400 | 650 | 21 | 200 HB | — |
+NThis page Normalized | Intermediate condition after forging, used to refine grain before final hardening. | 520 | 780 | 18 | 21 HRC | 8 % IACS |
Hot rolled / forged, peeled or rough-turned bar | Mill supply for re-forging or for customers who perform their own quench and temper. | 520 | 800 | 17 | 22 HRC | 8 % IACS |
+QT heavy section | Large studs and forged bars where mass effect lowers the guaranteed strength band despite the B+Ti hardenability boost. | 720 | 860 | 16 | 26 HRC | 7.8 % IACS |
+QTDefault Quenched and tempered | Standard supply condition for high-temperature bolts and studs: oil quench from ~960–990 °C, temper 680–730 °C. | 780 | 900 | 16 | 29 HRC | — |
What is 20CrMoVTiB4-10 +N?
20CrMoVTiB4-10 +N is 20CrMoVTiB4-10 heat treated to +N — intermediate condition after forging, used to refine grain before final hardening. 20CrMoVTiB4-10 +N has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 67% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi). 20CrMoVTiB4-10 +N 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). +QT is the default condition FabDigit quotes; +N is available on request or by drawing note.
Advantages
- High service temperature — 450°C (842 °F), better than 86% of steel grades
20CrMoVTiB4-10 +N properties
Typical room-temperature values for 20CrMoVTiB4-10 +N; 23 are specific to this condition. Other listed values are 20CrMoVTiB4-10 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
20CrMoVTiB4-10 +N 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).
Mechanical16
20CrMoVTiB4-10 +N has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 67% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
20CrMoVTiB4-10 +N is rated for continuous service to 450°C (842 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
20CrMoVTiB4-10 +N conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of 20CrMoVTiB4-10 +N takes about 33 MJ of energy and emits 2.4 kg of CO₂ — more than 76% of steel grades. Typical recycled content is 30%.
Manufacturability8
20CrMoVTiB4-10 +N's machinability is fair (50/100, worse than 53% of steel grades); weldability fair (40/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 20CrMoVTiB4-10 +N
Is 20CrMoVTiB4-10 easy to machine?
Machine in the annealed or normalized state where possible; in +QT at ~280 HB use rigid setups, coated carbide, 80–140 m/min and generous coolant — V/Ti carbides accelerate flank wear.
Can 20CrMoVTiB4-10 be welded?
Weldable only with matched Cr-Mo-V or 1CrMo consumables, 250–350 °C preheat and PWHT at 690–730 °C; avoid welding on finished bolt bodies.
Can 20CrMoVTiB4-10 be formed, bent or molded?
Hot forge 1100–850 °C then normalize; cold heading is not practical — bolt heads are hot- or warm-formed before quench and temper.
What surface finishes work on 20CrMoVTiB4-10?
No anodising; use phosphate + MoS₂ or graphite anti-seize for hot bolting, aluminium/zinc-flake or aluminising for oxidation protection; avoid electroplating (hydrogen embrittlement) or bake immediately.
20CrMoVTiB4-10 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 | 0.1 – 0.35 | 0.25 |
| Mn | 0.4 – 0.8 | 0.6 |
| P | ≤ 0.03 | — |
| S | ≤ 0.02 | — |
| Cr | 0.9 – 1.2 | 1.05 |
| Mo | 0.9 – 1.1 | 1 |
| Vrange varies slightly between DIN 17240 and EN 10269 editions | 0.2 – 0.35 | 0.28 |
| Tigrain refinement, protects boron from N | 0.04 – 0.12 | 0.08 |
| Bhardenability booster | 0 – 0.01 | 0 |
| Fe | balance | — |
20CrMoVTiB4-10 +N — frequently asked
What is 20CrMoVTiB4-10 +N used for?
20CrMoVTiB4-10 +N is typically used for carburized gears, high-wear shafts, automotive transmission components and heavy machinery parts. In short: boron-boosted hardenability; carburizing and hot-bolting grade; wear resistant after case hardening.
What is the yield strength of 20CrMoVTiB4-10 +N?
20CrMoVTiB4-10 +N has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 20CrMoVTiB4-10 +N easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Machine in the annealed or normalized state where possible; in +QT at ~280 HB use rigid setups, coated carbide, 80–140 m/min and generous coolant — V/Ti carbides accelerate flank wear.
Can 20CrMoVTiB4-10 +N be welded?
With care — weldability is rated fair (40/100). Weldable only with matched Cr-Mo-V or 1CrMo consumables, 250–350 °C preheat and PWHT at 690–730 °C; avoid welding on finished bolt bodies.
What surface finishes work on 20CrMoVTiB4-10 +N?
No anodising; use phosphate + MoS₂ or graphite anti-seize for hot bolting, aluminium/zinc-flake or aluminising for oxidation protection; avoid electroplating (hydrogen embrittlement) or bake immediately.
Can 20CrMoVTiB4-10 +N be formed, bent or molded?
Hot forge 1100–850 °C then normalize; cold heading is not practical — bolt heads are hot- or warm-formed before quench and temper.
What is the maximum service temperature of 20CrMoVTiB4-10 +N?
20CrMoVTiB4-10 +N is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties — CEN (2013)
- DIN 17240 — Warmfeste und hochwarmfeste Werkstoffe für Schrauben und Muttern — DIN (1976)
- EN 10027-2 / Stahl-Eisen-Liste material number 1.7729 — Verlag Stahleisen (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.