Printed from Kezuriba (kezuriba.net/en/materials/ti-10-2-3/)
Ti-10V-2Fe-3Al
ISO S (heat-resistant alloys & titanium)Near-beta titanium alloy (for high-strength forgings). Number: UNS R56410. Standard: AMS 4983 / 4984 / 4986 / 4987 (all forgings; divided by strength level).
🌐JIS and international equivalents
“Close” means composition or properties are not exactly the same. Before substituting, check the values in each standard.
| System | Designation | Number | Relation | Confidence |
|---|---|---|---|---|
| UNS | Ti-10V-2Fe-3Al | UNS R56410 | — | |
| JIS | — | — | Not confirmed | |
| GB | — | — | Not confirmed | |
| EN / WL | — | — | Not confirmed |
Differences between the equivalents (from the sources)
- JIS : No JIS equivalent (not found in primary sources)
- GB : An aggregated database lists TB6 of GB/T 3620.1 as the corresponding grade, but it is not confirmed in primary sources, so the field is left blank
- EN / WL : Not confirmed
📄Related specifications (AMS, ASTM etc.)
Specifications called up on purchase orders and drawings. AMS are SAE aerospace material specifications, split by product form (bar, plate, forging), melting practice and heat treatment. Standard texts are paid, so only titles and scopes checked on the publishers’ public pages are shown.
| Spec | Scope | Confidence |
|---|---|---|
| AMS 4983 | Titanium Alloy, Forgings, 10V - 2Fe - 3Al, Consumable Electrode Melted, Single-Step Solution Heat Treated and Aged, 180 ksi (1241 MPa) Tensile StrengthForgings, single solution treatment + aging, 180 ksi tensile strength class (in MIL-HDBK-5J, die forgings under 1 in thick) | One source / reference[7][3] |
| AMS 4984 | Titanium Alloy Forgings 10V - 2Fe - 3Al, Consumable Electrode Melted, Solution Heat Treated and Aged, 173 ksi (1193 MPa) Tensile StrengthForgings (section thickness ≤3.0 in) and forging stock, solution treatment + aging, 173 ksi class | One source / reference[8][2] |
| AMS 4986 | Titanium Alloy, Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Single-Step Solution Heat Treated and Overaged 160 ksi (1103 MPa) Tensile StrengthForgings, single solution treatment + overaging, 160 ksi class (emphasis on toughness) | One source / reference[9][2] |
| AMS 4987 | TITANIUM ALLOY FORGINGS 10V - 2Fe - 3Al Consumable Electrode Melted, Single Solution Heat Treated and Overaged 140,000 psi (965 MPa) Tensile StrengthForgings (section thickness under 4.0 in) and forging stock, solution treatment + overaging, 140 ksi class. The current edition on SAE Mobilus is AMS4987G (2025-02-25) | Agrees in 2+ sources[10][2] |
All ASTM standards on Kezuriba: ASTM standards quick reference.
✈Main aerospace uses (as stated in the sources)
- Landing gear components[2][1][11]
- Airframe structural parts: fittings, fasteners, actuators, flap tracks (typical applications per TIMET)[2]
- Helicopter rotor hubs (TIMET: Rotor Heads; Aubert & Duval: Helicopter rotor hubs)[2][1]
- An alloy developed for high-strength forgings, suited to near-net-shape forging. High strength is obtained by quenching up to a thickness of about 5 in (MIL-HDBK-5J)[3][2]
⚗Chemical composition (mass %)
Ranges differ between specifications, so each one has its own column (dark figures agree in several sources, light figures come from one source).
| Element | Spec ① | Spec ② |
|---|---|---|
| V | 9 – 11[2] | — |
| Fe | 1.6 – 2.2[2] | — |
| Al | 2.6 – 3.4[2] | — |
| O | ≤ 0.13[2] | — |
| C | ≤ 0.05[2] | — |
| N | ≤ 0.05[2] | — |
| H | ≤ 0.015[2] | — |
| Others (each / total) | ≤ 0.10 / 0.13[2] | — |
| Ti | — | Balance[2][1] |
- Spec ① Composition table of the TIMET datasheet (TIMETAL 10-2-3)
- Spec ② TIMET, Aubert & Duval
⚖Density
4.65 g/cm³
TIMET and Aubert & Duval give 4.65, and MIL-HDBK-5J gives 0.168 lb/in³ (= 4.65). The beta transus is 800°C for both TIMET and Aubert & Duval (MIL-HDBK-5J: "generally 1460–1480°F")
Calculate weight in Ti-10V-2Fe-3Al →💪Mechanical properties
“Reference” values are not specified minimums from the standard but figures published by makers and others.
| Condition | Tensile MPa | Yield MPa | Elong. % | Hardness | Type of value |
|---|---|---|---|---|---|
| Single solution treatment + aging (900–950°F), die forgings (thickness under 1.000 in) | ≥ 1241 (180ksi) | ≥ 1103 (160ksi) | ≥ 4 | — | Design allowable, S-basis (MIL-HDBK-5J Table 5.5.3.0(b), material of AMS 4983; the S-basis corresponds to the minimum value of the specification). Agrees with the 180 ksi in the title of AMS 4983 One source / reference[3] |
| Solution treatment + aging (900–950°F, 8 h), forgings (thickness ≤3 in) | ≥ 1193 (173ksi) | ≥ 1103 (160ksi) | ≥ 4 | — | Guaranteed minimum (listed by TIMET as AMS 4984) and design allowable, S-basis (MIL-HDBK-5J, die forgings of AMS 4984) agree. TIMET also lists fracture toughness K1C ≥44 MPa√m (40 ksi√in) Agrees in 2+ sources[2][3] |
| Solution treatment + overaging (950–1000°F, 8 h), forgings (thickness ≤4 in; MIL-HDBK-5J covers open-die forgings under 3 in and 3.001–4.000 in) | ≥ 1103 (160ksi) | ≥ 1000 (145 ksi; TIMET's conversion is 998) | ≥ 6 | — | Guaranteed minimum (listed by TIMET as AMS 4986) and design allowable, S-basis (MIL-HDBK-5J, open-die forgings of AMS 4986) agree. TIMET also lists K1C ≥60 MPa√m (55 ksi√in) Agrees in 2+ sources[2][3] |
| Solution treatment + overaging (1050–1100°F, 8 h), forgings (thickness ≤4 in) | ≥ 965 (140ksi) | ≥ 896 (130ksi) | ≥ 8 | — | Guaranteed minimum (listed by TIMET as AMS 4987). K1C ≥88 MPa√m (80 ksi√in). Agrees with the 140,000 psi (965 MPa) in the title of AMS 4987 One source / reference[2] |
| Solution treatment + aging (510°C × 8 h), room temperature | 1214 | 1145 | 12 | — | Typical value (TIMET datasheet Table 6) One source / reference[2] |
| Heat-treated material, room temperature | 1000–1300 | 900–1200 | 5–12 (5d) | — | Typical value (Aubert & Duval; stated explicitly as not a guaranteed value) One source / reference[1] |
1 MPa ≈ 145 psi (0.145 ksi). Hardness conversion · unit converter
🔧Machinability notes (as stated in the sources)
- ISO classification: S (titanium alloys)[4][6]
- ISCAR machinability rating (average): 56% for solution treated + aged material (HRC 35–42). The reference is annealed Ti-6Al-4V (HRC 32–36) = 100%[6]
- ISCAR: the view that heat-treated beta and near-beta alloys are "comparable to austenitic stainless steel" fundamentally does not apply. Because of the beta-stabilizing elements, the beta phase has a higher specific cutting force and is harder to cut[6]
📚Sources
Primary sources (public documents from makers, industry associations and standards bodies), numbered where each value is cited. Many are in Japanese.
- aubertduval.com https://www.aubertduval.com/wp-content/uploads/2024/12/Ti1023_GB.pdf
- timet.com https://www.timet.com/documents/datasheets/metastable-beta-alloys/timetal-10-2-3.pdf
- everyspec.com https://everyspec.com/MIL-HDBK/MIL-HDBK-0001-0099/MIL_HDBK_5J_139/
- sandvik.coromant.com https://www.sandvik.coromant.com/en-us/knowledge/materials/workpiece-materials
- sumitool.com https://www.sumitool.com/downloads/cutting-tools/general-catalog/assets/pdf/a.pdf#page=18
- iscar.co.za https://iscar.co.za/Catalogs/Publication/english_1/machining_titanium/machining_titanium_0…
- sae.org https://www.sae.org/standards/content/ams4983f/
- sae.org https://www.sae.org/standards/content/ams4984a/
- sae.org https://sae.org/standards/content/ams4986f
- saemobilus.sae.org https://saemobilus.sae.org/standards/ams4987-titanium-alloy-forgings-10v-2fe-3al-consumabl…
- timet.com https://www.timet.com/assets/local/documents/technicalmanuals/TiAlloys.pdf
Other materials
Titanium