SS 440c flat bar specification, chemical composition and mechanical properties
A convenient marketplace to discover verified grade 440C stainless steel flats suppliers in the Middle East
What’s the difference between 440 and 440C stainless steel flats?
440 Stainless Steels is a class of a family of stainless steels under which other subtypes are included. 440 Steels refer to four types of steels namely, 440A, 440B, 440C, and 440F steel. These steels differ on the basis of their carbon content in their composition. Common elements across all 440 stainless steel include 16-18% chromium, 1% Manganese, 1% silicon, 0.75% Molybdenum, 0.04% Phosphorus, 0.03% sulfur, and some percentage of Carbon.
440C and 440F stainless steels types contain 0.95-1.20% of Carbon and they make the most popular of the steels among the four. This is because they have the highest hardness. Stainless Steel 440C Flats, therefore, come under the category of 440 stainless steel and are a part of it. It differs from other subtypes on the basis of carbon content which affects their properties and thus, usage. This includes ASTM A276 UNS S44004 Flat Bar and ASTM A276 Type 440C Bright Flat Bar as its sub-products.
Stainless steel 440C flat bars and 440c flat stock with Material origin certificate
How strong is 440c flat bar steel?
440C stainless steels is one of four 440 stainless steels types and it is considered to be the strongest among all the other types. It has the highest hardness, highest strength, and greatest wear resistance of all of them after it has undergone hardening via heat treatment. It is also magnetic both in its pre-hardened and post-hardened states.
The 440C Flat Bar when measured at 20°C gives a Brinell hardness of 285 while Rockwell Hardness of B97. It has a tensile strength of 740 – 755 MPa at 20 °C while offering a yield strength of 445 MPa at 20 °C. Being a high-content carbon steel, it is natural for them to be strong and thus is used in industries where strength is a major requirement.
UNS S44004 flats and 440c stainless steel flat stock available in hot/ cold drawn finish
Is stainless steel 440C flat bars good stainless steel?
Stainless Steel 440C Flat Bars can be considered good stainless steels because all the 440 steels is hardenable and is considered high carbon alloy steels. When treated with heat they become the hardest of all the stainless steels.
Although 440C stainless steel gets rusted, the strengthening of them with the help of heat treatment makes them both abrasion-resistant as well as corrosion-resistant. In the annealed state the steel and its products like SS 440C Flat Rod allows easy work on itself and can be formulated into any shape.
SS 440C flat rod and AISI 440C stainless steel flats in numerous sizes, forms, and lengths
Can ASTM A276 SUS440C flats be welded?
Generally, Grade 440C stainless steels is not recommended for welding because it can be easily air-hardened. However, to weld this alloy and its products such as ASTM A276 SUS440C flats, it should be preheated to 260°C (500°F). After completion of the welding process, it should be post-weld treated at 732-760°C (1350-1400°F) for 6 hours.
The process is concluded by slowly cooling in the furnace and furnishing the product giving the final touches. Grade 440C Stainless Steel flats can be welded in the same way and thus it can be said that this steel can indeed be welded.
