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
Loading thread data ...
"Caroline" schrieb im Newsbeitrag news:oglzc.9269$
Google #1 hit for "alloy 4027" :
formatting link
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
formatting link
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
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.
formatting link
is terrific. Can't believe how hard this ISTM basic info was to find on the 'net... Live and learn. :-)
Reply to

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.