316Ti (S31635)

What is 316Ti stainless steel and its applications?

316Ti stainless steel (UNS S31635) is a titanium-stabilized, molybdenum-bearing austenitic grade. It is considered for process equipment where thermal exposure makes sensitization resistance relevant to material selection.

Heated process systems: Piping and equipment components subject to sustained thermal exposure.
Heat exchangers: Connections requiring review of both corrosion and metal temperature.
Fabricated chemical equipment: Parts where the specified stabilized condition must be retained through manufacture.

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Engineering Application & Selection Guide

Titanium ties up carbon as titanium carbides, limiting chromium-carbide formation when the material has the appropriate thermal treatment. Stabilization addresses sensitization; it is not a general solution to chloride pitting or stress-corrosion cracking.

316Ti stud bolts — For heated process joints, state the required thermal condition and design temperature with the drawing.
316Ti hex bolts — On dissimilar-metal supports, check thermal expansion and the temperature of the actual bolt location.
316Ti custom fasteners — If welding or hot working is proposed, define how the specified condition and corrosion requirements will be verified afterwards.

Compare 316L when welding is the principal concern, and 321 when reviewing stabilization without the same molybdenum-bearing chemistry. Selection requires the actual exposure and product specification; the Ti suffix does not establish an allowable fastener temperature.

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316Ti Composition

Composition limits · wt.%

ElementWeight %

Cr: 16–18%
Ni: 10–14%
Mo: 2–3%
Ti: 5×(C+N)–0.70%
C: ≤0.08%
Mn: ≤2.0%
P: ≤0.045%
S: ≤0.030%
Si: ≤0.75%
N: ≤0.10%
Fe: Balance

ASTM / ASME specifications by product form

Finished-product requirements

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

316Ti 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
Plate, sheet & strip · Specify grade, condition and order requirements.	ASTM A240

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

How to specify round bar, plate, wire and strip ↗

316Ti Mechanical Properties

Reference sample and condition

Data basis: Producer typical reference
Test temperature: Room temperature
Gauge length: 2 in (51 mm)

Key properties	Value
Tensile strength	620 MPa
0.2% yield strength	248 MPa
Elongation	54%

ATI · 316Ti · Technical Data Sheet · pages 1–2 ↗

Procurement and application guide

Specify the material and final condition

Specify stabilized condition and thermal exposure.

Material forms in the technical reference: Plate · Sheet · Strip.

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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