China · GJB

TC6

GJB 2218A:2008 — Specification of titanium and titanium alloy bars and forging stocks for aircraft

Chemical composition

wt% · log scale
0.0010.010.1110100Al5.5 – 7C0.08Cr0.8 – 2.3Fe0.2 – 0.7H0.015Mo2 – 3N0.05O0.18Others total0.1Si0.15 – 0.4Total Others0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥800 MPaYield strength Rp0.2≥840 MPaTensile strength Rm≥920 MPaTensile strength Rm≥980 MPaElongation A≥9 %Elongation A≥10 %Reduction of area Z≥20 %Reduction of area Z≥25 %

Creep properties

536572608643679400MPa
  • 100.0h

Temperature °C · time at rupture

Chemical composition

ElementminmaxSimilarRemarks
Al5.57
C0.08
Cr0.82.3
Fe0.20.7
H0.015
Mo23
N0.05
O0.18
Others total0.1
Si0.150.4
Ti​​Bal​​​​Bal​​
Total Others0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, heat treated, 12 <= d <= 100mm, d - bars or≥800；≥840≥920；≥980≥9；≥10≥20；≥25

High/low temperature

Tensile strength Rm (MPa)
ConditionTemperature ℃min
bars ( longitudinal ) heat treated 12 <= d <= 100mm d - bars diameter or thickness400735

Creep

1.热处理  锻件

Temperature ℃Time hCRS
400100.0h550.0

Heat treatment

Type34
Heat-treatment process热处理860℃~920℃，保温1~2h，随炉或转炉冷却至600℃~650℃，保温2h，空冷