Ti-5Al-2Sn-2Zr-4Mo-4Cr — datasheet, composition & supply

Titanium

Units

Tensile Rm

1120

MPa · ≥ std. min

Yield Rp0.2

1030

MPa · ≥ std. min

Elongation A

% · ≥ std. min

Service limit

430

°C · indicative max

Density

4.65

g/cm³

Chemical composition

Ti82%

Ti 82%Al 5%Mo 4%Cr 4%Sn 2%Zr 2%O 0.10%Minor & residual 0.59%

Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.

	Element	Name	Content %
Main elements7 elements
	Ti	Titanium	Bal.
	Al	Aluminium	4.5 – 5.5%
	Mo	Molybdenum	3.5 – 4.5%
	Cr	Chromium	3.5 – 4.5%
	Sn	Tin	1.5 – 2.5%
	Zr	Zirconium	1.5 – 2.5%
	O	Oxygen	0.08 – 0.13%

	Element	Name	Content %
Minor & residual5 elements
	Fe	Iron	≤ 0.3%
	Cu	Copper	≤ 0.1%
	Mn	Manganese	≤ 0.1%
	C	Carbon	≤ 0.05%
	N	Nitrogen	≤ 0.04%

Mechanical minima by form

Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.

Form	Condition	Rm MPa	Rp0.2 MPa	A ≥ %
Bar (7–100 mm)	Heat-treated test blank; recommended 830–850 °C air cooled → 780–820 °C water cooled → 590–650 °C for 8 h, air cooled	≥ 1120	≥ 1030	≥ 7
As-forged specimens from powder-metallurgy forging stock and preforms	Forged ≥30% at 28–56 °C above the beta transus + 802 °C for ≥4 h, water quenched + aged at 593–677 °C for ≥8 h	1124 – 1262	1055 – 1193	≥ 5
Bar	Tensile at 400 °C (optional purchase item)	≥ 885	—	—

Where this grade is recommended

Matched in 2 service conditions; ranks and scores computed from the condition-scoring matrix.

Service condition	Industry	Temperature	Rank	Score
Landing gear & forgings	Aerospace	≤ 200 °C	5 / 7	90
Airframe & lightweight	Aerospace	≤ 200 °C	6 / 10	88

Designations & equivalents

Trade name(s)

Ti-5Al-2Sn-2Zr-4Mo-4Cr / Ti-17

Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →

Applicable standards

2 specifications. Name the standard and its edition on the order.

GB/T 2965SAE AMS 4995 Ti-5Al-2Sn-2Zr-4Cr-4Mo-0.10O

Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.

Frequently asked questions

What is TC17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr)?

TC17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) — Titanium. High strength with damage tolerance — fan discs

What is the maximum service temperature of TC17?

Typically about 430 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.

What is the tensile strength of TC17?

The specified minimum tensile strength is 1120 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.

Which standards cover TC17?

GB/T 2965, SAE AMS 4995 Ti-5Al-2Sn-2Zr-4Cr-4Mo-0.10O

Where is TC17 typically used?

Landing gear & forgings (Aerospace); Airframe & lightweight (Aerospace)

In which forms is TC17 available?

Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.

Same series

Download PDF datasheet

This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.

Download PDF datasheet

Supply & enquiry

Tube & pipeφ1 – 219 × 0.25 – 25 mm

Plate4.76 – 80 mm

Barφ8 – 300 mm

Wire & filler metalsφ0.01 – 8 mm

For this grade we can supply, against your service conditions:

Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
Like-for-like alternatives and selection advice
Applicable standards and inspection scope

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