Where can I buy metric titanium screws

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kelemvor

Big Fleshy Monster
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Anyone know where I can buy metric titanium screws in small sizes? I need some m.2, m2.5 and m.3 in a few different lengths. When I search online, I find mostly places selling gimmicks such as steel that's been anodized with a thin titanium coating. The only place I've found (Allied Titanium) that actually lists titanium fasteners in the size I want requires minimum quantities of 500, and at a few dollars a screw that is WAY too many.

Stepping up to the gigantic m.5 sizes (and up) there are a bunch of options. That's far too large for my application.

Couldn't find any at usual sources such as mcmaster-carr or fastenal.

Aliexpress/Alibaba seems to be full of scammers selling the steel coated with titanium junk.

Might also be able to use steel in class 10.9 or 12.9. Mostly they just need to be very strong, and the right size.
 
I would look at McMaster-Carr. Not the cheapest but they have every fastener imaginable.

They have M3 in 6, 8, and 10mm lengths. Do they have to be metric or would Imperial work?
 
1.4571 (316Ti Alloy with titanium) is available on Ebay.de. It is a hard 316 and incredably resistant to saltwater.
Specs are:

1.4571 (316Ti) Bar
Stainless steel types 1.4401 and 1.4404 are also known as grades 316 and 316L respectively. Grade 316 is an austenitic grade second only to 304 in commercial importance.
316 stainless steel contains an addition of molybdenum that gives it improved corrosion resistance. This is particularly apparent for pitting and crevice corrosion in chloride environments.
316L, the low carbon version of 316 stainless steel, is immune to grain boundary carbide precipitation (sensitisation). This makes it suited to use in heavy gauge (over about 6mm) welded components.
For elevated temperature applications the high carbon variant, 316H stainless steel and the stabilised grade 316Ti stainless steel should be employed.
The austenitic structure of 316 stainless steel gives excellent toughness, even at cryogenic temperatures.
Property data given in this document is typical for bar products covered by EN 10088-3:2005. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

Stainless steel grade 316Ti contains a small amount of titanium. Titanium content is typically only around 0.5%. The titanium atoms stabilise the structure of the 316 at temperatures over 800°C. This prevents carbide precipitation at the grain boundaries and protects the metal from corrosion. The main advantage of 316Ti is that it can be held at higher temperatures for a longer period without sensitisation (precipitation) occurring. 316Ti retains physical and mechanical properties similar to standard grades of 316.

Chemical Composition
Spec: EN10088-3:2005
1.4571 Steel

Chemical Element % Present
Carbon (C) 0.0 - 0.08
Chromium (Cr) 16.50 - 18.50
Molybdenum (Mo) 2.00 - 2.50
Silicon (Si) 0.0 - 1.00
Phosphorous (P) 0.0 - 0.05
Sulphur (S) 0.0 - 0.03
Nickel (Ni) 10.50 - 13.50
Titanium (Ti) 0.40 - 0.70
Manganese (Mn) 0.0 - 2.00
Iron (Fe) Balance
Properties
Physical Property Value
Density 8.0 g/cm³
Melting Point 1400 °C
Thermal Expansion 15.9 x10^-6 /K
Modulus of Elasticity 193 GPa
Thermal Conductivity 16.3 W/m.K
Electrical Resistivity 0.74 x10^-6 Ω .m
Spec: EN10088-3:2005
Bar - Up to 160mm Dia.

Mechanical Property Value
Proof Stress 200 Min MPa
Tensile Strength 500 to 700 MPa
Elongation A50 mm 40 Min %
Hardness Brinell 215 Max HB
Alloy Designations
Stainless Steel Grade 1.4571/316Ti also corresponds to the following designations but may not be a direct equivalent:

UNS S31625

320S31

Supplied Forms
  • Sheet
  • Strip
  • Tube
  • Bar
  • Pipe
  • Plate
  • Fittings & Flanges
Applications
Initially developed for use in paper mills 316 stainless steel is now typically used in:



Food processing equipment

Brewery equipment

Chemical and petrochemical equipment

Laboratory benches & equipment

Coastal architectural panelling

Coastal balustrading

Boat fittings

Chemical transportation containers

Heat exchangers

Mining screens

Nuts and bolts

Springs

Medical implants

Corrosion Resistance
Grade 316 has excellent corrosion resistance when exposed to a range of corrosive environments and media. It is usually regarded as “marine grade” stainless steel but is not resistant to warm sea water. Warm chloride environments can cause pitting and crevice corrosion. Grade 316 is also subject to stress corrosion cracking above around 60°C.

Heat Resistance
316 has good resistance to oxidation in intermittent service to 870°C and in continuous service to 925°C. However, continuous use at 425-860°C is not recommended if corrosion resistance in water is required. In this instance 316L is recommended due to its resistance to carbide precipitation.

Where high strength is required at temperatures above 500°C, grade 316H is recommended.

Fabrication
Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

Cold Working
Grade 316 is readily brake or roll formed into a variety of parts. It is also suited to stamping, heading and drawing but post work annealing is recommended to relieve internal stresses.

Cold working will increase both strength and hardness of 316 stainless steel.

Hot Working
All common hot working processes can be performed on 316 stainless steel. Hot working should be avoided below 927°C. The ideal temperature range for hot working is 1149-1260°C. Post-work annealing is recommended to ensure optimum corrosion resistance.

Machinability
316 stainless steel has good machinability. Machining can be enhanced using the following rules:



~ Cutting edges must be kept sharp. Dull edges cause excess work hardening.

~ Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.

~ Chip breakers should be employed to assist in ensuring swarf remains clear of the work

~ Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.

Heat Treatment
316 stainless steel cannot be hardened by heat treatment.

Solution treatment or annealing can be done by rapid cooling after heating to 1010-1120°C.

Weldability
Fusion welding performance for 316 stainless steel is excellent both with and without fillers. Recommended filler rods and electrodes for 316 and 316L are the same as the base metal, 316 and 316L respectively. Heavy welded sections may require post-weld annealing. Grade 316Ti may be used as an alternative to 316 in heavy section welds.

Oxyacetylene welding has not been found to be successful for joining of 316 stainless steel.
 
I would look at McMaster-Carr. Not the cheapest but they have every fastener imaginable.

They have M3 in 6, 8, and 10mm lengths. Do they have to be metric or would Imperial work?
McMaster was my first stop. I might be able to widen the holes to accommodate M3, but I'd much rather find the right sized fasteners. That way I can use stock parts each time a motor or mount has to be replaced. These things don't really come in imperial as far as I can tell. The parts I have are definitely metric.
 
1.4571 (316Ti Alloy with titanium) is available on Ebay.de. It is a hard 316 and incredably resistant to saltwater.
Specs are:

1.4571 (316Ti) Bar
Stainless steel types 1.4401 and 1.4404 are also known as grades 316 and 316L respectively. Grade 316 is an austenitic grade second only to 304 in commercial importance.
316 stainless steel contains an addition of molybdenum that gives it improved corrosion resistance. This is particularly apparent for pitting and crevice corrosion in chloride environments.
316L, the low carbon version of 316 stainless steel, is immune to grain boundary carbide precipitation (sensitisation). This makes it suited to use in heavy gauge (over about 6mm) welded components.
For elevated temperature applications the high carbon variant, 316H stainless steel and the stabilised grade 316Ti stainless steel should be employed.
The austenitic structure of 316 stainless steel gives excellent toughness, even at cryogenic temperatures.
Property data given in this document is typical for bar products covered by EN 10088-3:2005. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

Stainless steel grade 316Ti contains a small amount of titanium. Titanium content is typically only around 0.5%. The titanium atoms stabilise the structure of the 316 at temperatures over 800°C. This prevents carbide precipitation at the grain boundaries and protects the metal from corrosion. The main advantage of 316Ti is that it can be held at higher temperatures for a longer period without sensitisation (precipitation) occurring. 316Ti retains physical and mechanical properties similar to standard grades of 316.

Chemical Composition
Spec: EN10088-3:2005
1.4571 Steel

Chemical Element % Present
Carbon (C) 0.0 - 0.08
Chromium (Cr) 16.50 - 18.50
Molybdenum (Mo) 2.00 - 2.50
Silicon (Si) 0.0 - 1.00
Phosphorous (P) 0.0 - 0.05
Sulphur (S) 0.0 - 0.03
Nickel (Ni) 10.50 - 13.50
Titanium (Ti) 0.40 - 0.70
Manganese (Mn) 0.0 - 2.00
Iron (Fe) Balance
Properties
Physical Property Value
Density 8.0 g/cm³
Melting Point 1400 °C
Thermal Expansion 15.9 x10^-6 /K
Modulus of Elasticity 193 GPa
Thermal Conductivity 16.3 W/m.K
Electrical Resistivity 0.74 x10^-6 Ω .m
Spec: EN10088-3:2005
Bar - Up to 160mm Dia.

Mechanical Property Value
Proof Stress 200 Min MPa
Tensile Strength 500 to 700 MPa
Elongation A50 mm 40 Min %
Hardness Brinell 215 Max HB
Alloy Designations
Stainless Steel Grade 1.4571/316Ti also corresponds to the following designations but may not be a direct equivalent:

UNS S31625

320S31

Supplied Forms
  • Sheet
  • Strip
  • Tube
  • Bar
  • Pipe
  • Plate
  • Fittings & Flanges
Applications
Initially developed for use in paper mills 316 stainless steel is now typically used in:



Food processing equipment

Brewery equipment

Chemical and petrochemical equipment

Laboratory benches & equipment

Coastal architectural panelling

Coastal balustrading

Boat fittings

Chemical transportation containers

Heat exchangers

Mining screens

Nuts and bolts

Springs

Medical implants

Corrosion Resistance
Grade 316 has excellent corrosion resistance when exposed to a range of corrosive environments and media. It is usually regarded as “marine grade” stainless steel but is not resistant to warm sea water. Warm chloride environments can cause pitting and crevice corrosion. Grade 316 is also subject to stress corrosion cracking above around 60°C.

Heat Resistance
316 has good resistance to oxidation in intermittent service to 870°C and in continuous service to 925°C. However, continuous use at 425-860°C is not recommended if corrosion resistance in water is required. In this instance 316L is recommended due to its resistance to carbide precipitation.

Where high strength is required at temperatures above 500°C, grade 316H is recommended.

Fabrication
Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

Cold Working
Grade 316 is readily brake or roll formed into a variety of parts. It is also suited to stamping, heading and drawing but post work annealing is recommended to relieve internal stresses.

Cold working will increase both strength and hardness of 316 stainless steel.

Hot Working
All common hot working processes can be performed on 316 stainless steel. Hot working should be avoided below 927°C. The ideal temperature range for hot working is 1149-1260°C. Post-work annealing is recommended to ensure optimum corrosion resistance.

Machinability
316 stainless steel has good machinability. Machining can be enhanced using the following rules:



~ Cutting edges must be kept sharp. Dull edges cause excess work hardening.

~ Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.

~ Chip breakers should be employed to assist in ensuring swarf remains clear of the work

~ Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.

Heat Treatment
316 stainless steel cannot be hardened by heat treatment.

Solution treatment or annealing can be done by rapid cooling after heating to 1010-1120°C.

Weldability
Fusion welding performance for 316 stainless steel is excellent both with and without fillers. Recommended filler rods and electrodes for 316 and 316L are the same as the base metal, 316 and 316L respectively. Heavy welded sections may require post-weld annealing. Grade 316Ti may be used as an alternative to 316 in heavy section welds.

Oxyacetylene welding has not been found to be successful for joining of 316 stainless steel.
I'm looking for other metals mainly to improve shear strength. Others using these motors have reported the fasteners shearing due to the high torque of these motors. Due to the size and weight requirements, tiny and strong are both important hence my first thought was titanium. I'll have to look up the specs for stainless. Maybe it will be sufficient and easier to find.
 
you can also look on Ebay.de for "Titan Schrauben" They are available in your wished for sizes M2, M2.5 and M3. If you buy all from the same supplier (put in yor shopping cart), you'll only pay shipping once, and since we are only talking about a lighweight small padded envelope shipping won't be expensive.

Michael
 
Thanks so much! That particular fastener you linked only goes down to 3mm. However the site has others that are 2mm! Odd that they chose a Phillips head on such a small fastener, but it's not a problem.
Yah, that was the first one I came across, but they do them in a variety of sizes. VXB is a good company, although I've only used them for bearings personally.
 

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