عمود مدور استانلس 420 قطر 250مم
Stainless Steel 420 Round Bar 250 mm
86.395,00 EGP
304/304L Stainless Steel Round, an economical grade of stainless that is ideal for all applications where strength and superior corrosion resistance is required. 304 Stainless Round has a durable dull, mill finish that is widely used for all types of fabrication projects that are exposed to the elements – chemical, acidic, fresh water, and salt water environments.
Specifications: ASTM A276, QQS-763, T304/304L,non-polished finish
AKA: stainless rod, stainless round bar
Applications: frame work, braces, supports, shafting. axels, marine, food, etc.
Workability: Easy to Weld, Moderate Cutting, Forming and Machining.
Mechanical Properties: Brinell = 170, Tensile = 85,000 +/-, Yield = 34,000 +/-
Nonmagnetic
How is it Measured? Diameter (A) X Length
1000 in stock
Description
Grade 420
Grade 420 stainless steel is a higher carbon version of 410; like most carbon and low alloy steels it
can be hardened by heat treatment. It contains a minimum of 12 per cent chromium, just sufficient
to give corrosion resistant properties. 420 has good ductility in the annealed condition but is
capable of being hardened up to Rockwell Hardness 50HRC, the highest hardness of the 12 per
cent chromium grades. Its best corrosion resistance is achieved when hardened and surface
ground or polished.
Related grades to 420 are high carbon high hardness martensitic stainless steels such as the 440
series (see the Atlas Datasheet on this series of grades) and also variations to 420 containing
molybdenum (for increased corrosion resistance and mechanical properties), sulphur (for
increased machinability) or vanadium (for higher hardness). A slightly higher carbon version of
420 is the non-standard grade 420C.
Martensitic stainless steels are optimised for high hardness, and other properties are to some
degree compromised. Fabrication must allow for poor weldability and usually also include a final
harden and temper heat treatment. Corrosion resistance is lower than the common austenitic
grades, and their useful operating temperature range is limited by their loss of ductility at sub-zerotemperatures and loss of strength by over-tempering at elevated temperatures
Machining
In the annealed condition this grade is relatively easily machined, but if hardened to above 30HRC
machining becomes more difficult. Free machining grade 416 is a very
readily machined alternative.
Typical Applications
Cutlery, knife blades, surgical instruments. Needle valves. Shear blades.
Specified Properties
These properties are specified for bar product in ASTM A276. Bar is the most commonly available
form of grade 420. Similar but not necessarily identical properties are specified for other products
such as plate and forgings in their respective specifications.
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