Strength of Alloy 4027?

Can anyone tell me the yield strength and modulus of elasticity of Alloy 4027,
which I understand is used for many Craftsman hand tools?
I understand Alloy 4027 is 0.20 - 0.25 (%?) molybdenum.
Reply to
Caroline
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"Caroline" schrieb im Newsbeitrag news:oglzc.9269$ snipped-for-privacy@newsread2.news.atl.earthlink.net...
Google #1 hit for "alloy 4027" :
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The yield strength depends on heat treatment. I don't have the data at hand. If you need detailed info, phone a tool steel dealer. They may provide you with a detailed datasheet.
Reply to
Andreas Rutz
"Andreas Rutz" wrote
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Thank you. The site above shows a modulus of elasticity of about 29,000 psi, which is usual for steels.
I thought the tensile strength might be quite a bit more than for more "ordinary steels" (pardon the non-scientific terminology).
Aside: I got exactly one Google hit for "alloy 4027" and it wasn't the link above. I did a lot of other searches but came up empty-handed.
Reply to
Caroline
From Matweb: [Yield strength varies with temper. Here is the annealed version]
Subcategory: AISI 4000 Series Steel; Low Alloy Steel; Low Carbon Steel; Metal
Key Words: UNS G40270, ASTM A322, ASTM A331, ASTM A519, SAE J404, SAE J412, SAE J770, alloy steels
Component Wt. % C 0.25 - 0.3 Fe 98.08 - 98.7 Mn 0.7 - 0.9 Mo 0.2 - 0.3 P Max 0.035 S Max 0.04 Si 0.15 - 0.35
Material Notes: Annealed (heated to 865°C (1590°F), furnace cooled 11°C/hr to 425°C, air cooled). Normalizing temp.: 905°C. Carburizing temp.: 900 - 925°C.
Physical Properties Metric English Comments Density 7.85 g/cc 0.284 lb/in³
Mechanical Properties Hardness, Brinell 143 143 Hardness, Knoop 163 163 Converted from Brinell hardness. Hardness, Rockwell B 78 78 Converted from Brinell hardness. Hardness, Vickers 149 149 Converted from Brinell hardness. Tensile Strength, Ultimate 515 MPa 74700 psi Tensile Strength, Yield 325 MPa 47100 psi Elongation at Break 30 % 30 % in 50 mm Reduction of Area 52.9 % 52.9 % Modulus of Elasticity 205 GPa 29700 ksi Typical for steel Bulk Modulus 140 GPa 20300 ksi Typical for steel Poisson's Ratio 0.29 0.29 Calculated Machinability 70 % 70 % annealed and cold drawn. Based on 100% machinability for AISI 1212 steel. Shear Modulus 80 GPa 11600 ksi Typical for steel
Electrical Properties Electrical Resistivity 2.45e-005 ohm-cm 2.45e-005 ohm-cm This value is an average of known electrical resistivities of 4000 series steels and is expected to be within 10% of the experimental value
Thermal Properties Heat Capacity 0.475 J/g-°C 0.114 BTU/lb-°F Average heat capacity for 4000 series steels; expected to be within 10% of the experimental value Thermal Conductivity 44.5 W/m-K 309 BTU-in/hr-ft²-°F Typical for steel.
Reply to
Brian Whatcott
"Brian Whatcott" wrote
Thank you.
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is terrific. Can't believe how hard this ISTM basic info was to find on the 'net... Live and learn. :-)
Reply to
Caroline

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