Titanium B817 Type II G1-CLA
Grade · default condition
ASTM B817 Type II · UNS R56400
G1-CLA = type II Grade 1, Class A
Pick for structural aerospace/medical PM parts where wrought-equivalent strength, ductility and fatigue life are required.
Values for the G1-CLA condition
Other B817 Type II tempers and conditions
B817 Type II is listed in 3 conditions; see the grade overview at B817 Type II.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Type II Grade 2, Class B | Pick for lightly loaded or non-critical PM Ti-6Al-4V hardware where the lower strength/ductility acceptance level cuts scrap and cost. | 690 | 760 | 4 | 30 HRC | 0.88 % IACS |
Type II Grade 1, Class B | Pick for cost-driven near-net-shape parts where moderate strength is enough and full HIP densification is not justified. | 745 | 830 | 7 | 32 HRC | 0.93 % IACS |
G1-CLADefaultThis page Type II Grade 1, Class A | Pick for structural aerospace/medical PM parts where wrought-equivalent strength, ductility and fatigue life are required. | 855 | 930 | 12 | 35 HRC | 1 % IACS |
What is B817 Type II G1-CLA?
B817 Type II G1-CLA is B817 Type II in the G1-CLA grade — pick for structural aerospace/medical PM parts where wrought-equivalent strength, ductility and fatigue life are required. B817 Type II G1-CLA has a yield strength of 855 MPa (124 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 68% of titanium grades. Elongation at break is 12% and the elastic modulus is 113 GPa (16.4 Msi). B817 Type II G1-CLA has a density of 4.42 g/cm³ (0.16 lb/in³), lighter than 96% of titanium grades. It melts at 1,604°C (2,919 °F).
Limitations
- Poor heat conductor — 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
- Difficult to weld — 60/100, worse than 83% of titanium grades
- Limited ductility — 12%, worse than 78% of titanium grades
B817 Type II G1-CLA properties
Typical room-temperature values for B817 Type II G1-CLA; 24 are specific to this condition. Other listed values are B817 Type II reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
B817 Type II G1-CLA has a density of 4.42 g/cm³ (0.16 lb/in³), lighter than 96% of titanium grades. It melts at 1,604°C (2,919 °F).
Mechanical16
B817 Type II G1-CLA has a yield strength of 855 MPa (124 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 68% of titanium grades. Elongation at break is 12% and the elastic modulus is 113 GPa (16.4 Msi).
Thermal6
B817 Type II G1-CLA is rated for continuous service to 350°C (662 °F). It conducts heat at 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades. Thermal expansion is 8.7 µm/m·K (4.83 µin/in·°F).
Electrical3
B817 Type II G1-CLA conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), worse than 63% of titanium grades.
Sustainability4
Producing a kilogram of B817 Type II G1-CLA takes about 680 MJ of energy and emits 42 kg of CO₂ — more than 51% of titanium grades. Typical recycled content is 20%.
Manufacturability7
B817 Type II G1-CLA's machinability is poor (20/100, worse than 68% of titanium grades); weldability good (60/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with B817 Type II G1-CLA
Is B817 Type II easy to machine?
Machine like wrought Ti-6Al-4V: rigid setup, low SFM (25–45 m/min carbide), heavy flood coolant, positive rake, never dwell; as-sintered Class B cuts a little easier but porosity smears and can hide subsurface defects.
Can B817 Type II be welded?
GTAW/plasma/EB or laser welding in high-purity argon or vacuum only; Class A (HIP) welds soundly, Class B tends to outgas from residual porosity and needs HIP or vacuum degassing before joining.
Can B817 Type II be formed, bent or molded?
Shaped by die pressing, CIP, MIM or blended-elemental compaction then vacuum sintering (typically 1250–1350 °C) with optional HIP at ~900–950 °C / 100–150 MPa for Class A; secondary cold forming is not practical.
What surface finishes work on B817 Type II?
Bead/abrasive blast plus pickle to remove sintering scale; Type II/III titanium anodizing, passivation or plasma nitriding work on dense surfaces, and shot peening plus HIP is used to restore fatigue strength on porous sintered parts.
B817 Type II 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 |
|---|---|---|
| Alalpha stabilizer | 5.5 – 6.75 | 6 |
| Vbeta stabilizer | 3.5 – 4.5 | 4 |
| Fe | ≤ 0.4 | 0.2 |
| OPM specs allow higher oxygen than wrought R56400; upper limit tightened for Grade 1 | ≤ 0.3 | 0.2 |
| N | ≤ 0.05 | 0.02 |
| C | ≤ 0.08 | 0.03 |
| Hvacuum-degassed after sintering | ≤ 0.02 | 0.01 |
| Clresidual chloride from Kroll/HDH powder; PM-specific limit | ≤ 0.15 | 0.05 |
| other, each | ≤ 0.1 | — |
| other, total | ≤ 0.4 | — |
| Ti | balance | — |
B817 Type II G1-CLA — frequently asked
What is B817 Type II G1-CLA used for?
B817 Type II G1-CLA is typically used for sintered aerospace brackets, MIM structural fasteners, orthopedic implant components, automotive lightweight parts and sporting goods hardware. In short: near-net-shape Ti-6Al-4V; sintered structural titanium; HIP class for aerospace.
What is the yield strength of B817 Type II G1-CLA?
B817 Type II G1-CLA has a typical yield strength of 855 MPa (124 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 68% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is B817 Type II G1-CLA easy to machine?
Not especially — machinability is rated poor (20/100, worse than 68% of titanium grades). Machine like wrought Ti-6Al-4V: rigid setup, low SFM (25–45 m/min carbide), heavy flood coolant, positive rake, never dwell; as-sintered Class B cuts a little easier but porosity smears and can hide subsurface defects.
Can B817 Type II G1-CLA be welded?
Yes — weldability is rated good (60/100). GTAW/plasma/EB or laser welding in high-purity argon or vacuum only; Class A (HIP) welds soundly, Class B tends to outgas from residual porosity and needs HIP or vacuum degassing before joining.
What surface finishes work on B817 Type II G1-CLA?
Bead/abrasive blast plus pickle to remove sintering scale; Type II/III titanium anodizing, passivation or plasma nitriding work on dense surfaces, and shot peening plus HIP is used to restore fatigue strength on porous sintered parts.
Can B817 Type II G1-CLA be formed, bent or molded?
Shaped by die pressing, CIP, MIM or blended-elemental compaction then vacuum sintering (typically 1250–1350 °C) with optional HIP at ~900–950 °C / 100–150 MPa for Class A; secondary cold forming is not practical.
What is the maximum service temperature of B817 Type II G1-CLA?
B817 Type II G1-CLA 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.
What is the difference between B817 Type II G1-CLA and B817 Type II G2-CLB?
G1-CLA is the default condition — pick for structural aerospace/medical PM parts where wrought-equivalent strength, ductility and fatigue life are required. G2-CLB: pick for lightly loaded or non-critical PM Ti-6Al-4V hardware where the lower strength/ductility acceptance level cuts scrap and cost. Yield strength is 855 MPa in G1-CLA versus 690 MPa in G2-CLB.
Sources
- ASTM B817 Standard Specification for Powder Metallurgy (PM) Titanium Alloy Structural Components — ASTM International (2022)
- ASTM B348 / UNS R56400 Ti-6Al-4V chemistry basis — ASTM International (2021)
- ASM Handbook Vol. 7: Powder Metallurgy — Titanium PM — ASM International (2015)
- ASM Handbook Vol. 2 & Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- MMPDS Ti-6Al-4V typical property tables — Battelle/FAA (2023)
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.