UGI® 316Ti Stainless Steel – High‑Temperature, Non‑Magnetic, Solution Annealed

UGI® 316Ti is a titanium stabilised stainless steel with molybdenium added similar to UGI® 4571. The difference bet-ween the two grades lies in the titanium content which is superior in UGI® 316Ti than in UGI® 4571, which enhances its resistance to intergranular corrosion at high temperature (350°C - 850°C). Indeed, stabilisation rules of 1.4571 according to EN 10088-3 imposes Ti ≥ 5XC when 316Ti one’s according to ASTM A240 and A182 imposes Ti > 5x(C+N).

Non-magnetic in annealed condition.

Slight magnetism is produced by cold-working operations.

Properties

General

Property	Value
Density	7.95 g/cm³

Mechanical

Property	Value
Elastic modulus	200 GPa
Elongation	56 %
Reduction of area	72.0 %
Tensile strength	560 MPa

Thermal

Property	Value	Comment
Coefficient of thermal expansion	0.0000168 1/K	20 to 200°C
Thermal conductivity	15 W/(m·K)

Electrical

Property	Value
Electrical resistivity	7.4e-07 Ω·m

Chemical properties

Property	Value	Comment
Carbon	0.05	max.
Chromium	16.5 - 18.0 %
Manganese	2.0	max.
Molybdenum	2.0 - 2.5 %	max.
Nickel	10.5 - 11.5 %
Nitrogen	0.03	max.
Phosphorus	0.035	max.
Silicon	1.0	max.
Sulfur	0.03	max.
Titanium	0.7000000000000001	max., min: 5x(C+N)

Technological properties

Property

Application areas

Mechanical ans chemical industries

Oil and gas industries

Parts for boilers and incinerators

Corrosion properties

in natural environments: Water, rural and urban atmospheres, or industrial atmospheres and in the presence of moderate concentrations of chlorides and acids

in food processing and agricultural environments

in numerous acid (sulphuric, phosphoric and organic) and chloride chemical environments, un-der certain temperature and concentration conditions.

UGI® 316Ti is resistant to inter-granular corrosion in the same way as UGI® 4571. Remark: The corrosion resistance of a stainless steel depends on many factors related to the composition of the corrosive atmosphere (chloride concentration, presence or absence of oxidising agents, temperature, pH, agitation or no agitation, and so on), as well as to the preparation of the material (surfaces free from metal particles, surface finish, such as hardening, polishing, and so on). Precautionary measures should be taken for certain tests such as the saline mist test (ISO 9227): for example marking labels (that might cause corro-sion run-outs and reduce the test resistance time) should not be used on the sample. Taking into account all theses precaution, UGI® 316Ti can withstand saline mist test (ISO9227) above 1000 h without any occurrence of red rust spots.

The table below illustrates a performance scale (with three levels: good/average/excellent) in different environments:

Environment	Behavior
Nitric acid	Good
Phosphoric acid	Average
Sulphuric acid	Average
Acetic acid	Good
Sodium carbonate	Average
NaCl (Saline mist)	Good
Humidity	Excellent
Petroleum	Average
Sea water	Average

General machinability

UGI® 316Ti offers good machining performance as a result of the optimization of the inclusion population. This expands tool life, good chip breakability and good surface finish.

If you would like to use the grade to best advantage for your components and working environment, contact our Tech-nical service via your usual commercial contact.

Heat Treatment

The annealing treatment that gives UGI® 316Ti its lowest properties includes heating to 1020°C - 1120°C, followed by rapid air or water cooling.

Hot forming

Forging : Heating temperature: 1150 - 1200°C . Forging temperature: between 1200°C and 950°C. Air cooling (or water cooling if deformation is not a problem).

Other

Available products:

Product	Shape	Finish	Tolerance	Dimensions
Bar	Round	Rolled and descaled bars	12 to 13	22 to 130 mm
	Round	Turned and polished	9 to 11	22 to 130 mm
	Round	Drawn bar	8 to 9	1,8 to 55 mm
	Round	Ground bar	6 to 9	1,5 to 80 mm
	Hexagonal	Drawn bar	11	3 to 55 mm
Wire rod	Round	Pickeled		5.0 to 32 mm
Drawn wire	Round			16.0 to 0.5 mm

Do not hesitate to contact the supplier for further information

Weight of round bars (kg/m)	0.0062 x D2 (D: diameter in mm)
Weight of hexagonal bars (kg/m)	0.0068 x H2 (H: distance between sides in mm)
Weight of square bars (kg/m)	0.0078 x C2 (C: square side in mm)

Welding

UGI® 316Ti can be MIG or TIG welded, with or without filler material, using laser or resistance welding techniques.

When using filler wire, we recommend using ER318 (Nb stabilised). For cold applications, ER316LSi wire can also be used.

To minimize thermal cracking problems, tight control over welding parameters is required. To do this, always ensure when using arc welding that the linear welding power is limited.

UGI 4435 IRH: Solution‑Annealed & Work‑Hardened Stainless Steel – Superior Corrosion Resistance & Skin‑Friendly UGI® 316Ti – Premium Titanium‑Stabilised Stainless Steel for High‑Temperature Applications

Metal