Titanium Grade 2 (R50400)

What is Titanium Grade 2 and its applications?

Titanium Grade 2 (UNS R50400) is commercially pure titanium used where corrosion resistance, low mass and formability matter more than very high strength. Typical applications include seawater piping, heat exchangers and chemical-process vessels.

Seawater systems: Cooling-water piping and heat-exchanger components.
Chemical processing: Vessels and associated hardware selected for compatibility with the actual process medium.
Marine equipment: Corrosion-exposed components where lower component mass is useful.

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Engineering Application & Selection Guide

Grade 2 relies on a protective titanium oxide film rather than an age-hardening treatment. Its predominantly alpha structure provides useful ductility; the grade designation should not be read as a high-strength fastener property class.

Titanium Grade 2 hex bolts — For exposed marine connections, assess the connected metals and area ratio as well as the corrosion of the bolt itself.
Titanium Grade 2 stud bolts — For vessel joints, establish the required clamp load and thread engagement before deciding whether commercially pure titanium has sufficient strength.
Titanium Grade 2 flat washers — Specify bearing dimensions and surface condition; the washer must suit both the clamped surface and the tightening method.

Consider Titanium Grade 5 when strength drives the design, but reassess the environment and installation procedure. Neither grade should be assigned a torque from a stainless-steel table. Address thread friction, galling and possible hydrogen uptake when defining the joint.

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Titanium Grade 2 Composition

Composition limits · wt.%

ElementWeight %

Ti: Balance
C: ≤0.08%
H: ≤0.015%
O: ≤0.25%
N: ≤0.03%
Fe: ≤0.30%
Other elements, each: ≤0.10%
Other elements, total: ≤0.40%

ASTM / ASME specifications by product form

Finished-product requirements

Specify the finished-fastener mechanical requirements, condition and inspection separately from the starting-stock specification.

Titanium Grade 2 hex bolt requirements ↗

Fasteners · dimensional references

Product	Reference
Hex bolts	ISO 4014 / ISO 4017 · ASME B18.2.1
Threaded studs	DIN 976-1 · ASME B18.31.2
Hex nuts	ISO 4032 · ASME B18.2.2
Socket head screws	ISO 4762 · ASME B18.3
Flat washers	ISO 7089 / ISO 7090 · ASME B18.21.1
Custom fasteners	Customer drawing

Raw-material specifications

Product form / scope	Reference
Bar & billet · Specify grade, condition and order requirements.	ASTM B348
Plate, sheet & strip	ASTM B265
Tube	ASTM B338 / ASME SB338
Forgings	ASTM B381 Grade F-2

Dimensions do not define material or finished-part compliance. Specify the grade, condition and applicable requirements.

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Titanium Grade 2 Mechanical Properties

Reference sample and condition

Data basis: Catalogue reference minimums
Gauge length: A5, as labelled in supplied table

Key properties	Value
Tensile strength	≥345 MPa
0.2% yield strength	≥275 MPa
Elongation	≥20%

Supplied technical reference · Scanned PDF page 7 · printed page 19

Titanium Grade 2 Physical Properties

Property	Value	Unit
Density	4.51	g/cm³
Elastic modulus	105–120	GPa

Procurement and application guide

Specify the material and final condition

Specify the exposure, strength requirement and product form.

Material forms in the technical reference: Bar · Billet · Plate · Sheet · Strip · Pipe & tube · Forgings.

Define the finished-part acceptance

Include the material or bolting specification, required final condition, dimensions and quantity. State the service medium, temperature and loading where known. Agree the required tests, inspection coverage and acceptance criteria for the finished part.

Start with the information you have

Send a drawing or share the product form and dimensions. Identify any undecided requirements for review rather than copying a typical property value into the purchase order.

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