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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bedding a howa mini
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<blockquote data-quote="ntsqd" data-source="post: 1640280" data-attributes="member: 93138"><p>You made me curious, so I looked up their properties. Devcon offers their Metallic Putties in these flavors: Steel (ST), Aluminum, Stainless Steel (SST), Bronze (BR), and Titanium (Ti). Click on the "TDS" button to the right to get a pdf of the properties of each.</p><p></p><p><a href="https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-plastic-steel-putty-a" target="_blank">Devcon Steel (ST) Putty</a></p><p><a href="https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-aluminum-putty-f" target="_blank">Devcon Aluminum (AL) Putty</a></p><p><a href="https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-stainless-steel-putty-st" target="_blank">Devcon SST Putty</a></p><p><a href="https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-bronze-putty-br" target="_blank">Devcon Bronze (BR) Putty</a></p><p><a href="https://itwperformancepolymers.com/products/devcon/corrosion-erosion-repair/devcon-titanium-putty" target="_blank">Devcon Titanium (Ti) Putty</a></p><p></p><p>Cf-Thermal Expansion as of this writing (19/05/22):</p><p>ST: 48in^2*F°EE-6</p><p>AL: 29in^2*F°EE-6</p><p>SST: 34in^2*F°EE-6</p><p>BR: 33in^2*F°EE-6</p><p>Ti: 22in^2*F°EE-6</p><p></p><p>Compressive Strength:</p><p>ST: 8260psi</p><p>AL: 8420psi</p><p>SST: 8400psi</p><p>BR: 8540psi</p><p>Ti: 15,200psi</p><p></p><p>Shrinkage:</p><p>ST: .0006in/in</p><p>AL: .0008in/in</p><p>SST: .0010in/in</p><p>BR: .0010in/in</p><p>Ti: .0010in/in</p><p></p><p>Ti is attractive for it's Cf-TE and Comp Strength, but the shrinkage kills it. Their shrinkage also eliminates the SST & BR putties.</p><p></p><p> AL putty is slightly higher in compressive strength and gives up .0002in/in in shrinkage to the ST putty. So in the total action length of the Howa Mini it will have shrunk about .001in more than the ST putty. AL has ~40% lower Cf-TE than ST and for me makes it the obvious choice.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 1640280, member: 93138"] You made me curious, so I looked up their properties. Devcon offers their Metallic Putties in these flavors: Steel (ST), Aluminum, Stainless Steel (SST), Bronze (BR), and Titanium (Ti). Click on the "TDS" button to the right to get a pdf of the properties of each. [URL='https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-plastic-steel-putty-a']Devcon Steel (ST) Putty[/URL] [URL='https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-aluminum-putty-f']Devcon Aluminum (AL) Putty[/URL] [URL='https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-stainless-steel-putty-st']Devcon SST Putty[/URL] [URL='https://itwperformancepolymers.com/products/devcon/metal-rebuilding-repair/devcon-bronze-putty-br']Devcon Bronze (BR) Putty[/URL] [URL='https://itwperformancepolymers.com/products/devcon/corrosion-erosion-repair/devcon-titanium-putty']Devcon Titanium (Ti) Putty[/URL] Cf-Thermal Expansion as of this writing (19/05/22): ST: 48in^2*F°EE-6 AL: 29in^2*F°EE-6 SST: 34in^2*F°EE-6 BR: 33in^2*F°EE-6 Ti: 22in^2*F°EE-6 Compressive Strength: ST: 8260psi AL: 8420psi SST: 8400psi BR: 8540psi Ti: 15,200psi Shrinkage: ST: .0006in/in AL: .0008in/in SST: .0010in/in BR: .0010in/in Ti: .0010in/in Ti is attractive for it's Cf-TE and Comp Strength, but the shrinkage kills it. Their shrinkage also eliminates the SST & BR putties. AL putty is slightly higher in compressive strength and gives up .0002in/in in shrinkage to the ST putty. So in the total action length of the Howa Mini it will have shrunk about .001in more than the ST putty. AL has ~40% lower Cf-TE than ST and for me makes it the obvious choice. [/QUOTE]
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