Steelo Fabrica is the Leading manufacturing and exporting company providing ASTM A638 Grade 660 type 2 round bars made from high-quality raw materials.
We provide these bars in different designations, specifications, standards, custom dimensions.
Table of Content
The chemical composition of the ASTM A638 round bars consisted of nickel, manganese, silicon, and chromium. Along with these materials, there is also the addition of other elements such as carbon, phosphorus, copper, sulfur.
The chromium content in ASTM A638 alloy added increased resistance to oxidation. The resistance ability increases when chromium content is also added. The extra nickel results in the high amount to form the most significant rust and heat resistance class.
The percentage of nickel is to form austenite that leads to greater strength and toughness. This 660-grade alloy also has important elements such as titanium. The prime purpose of alloying elements is carbide stabilization, and it is combined with carbon content to form titanium carbides that are stable and hard to dissolve.
The percentage of manganese added results in the improvisation of hot working attributes and enhances properties such as increase power, hardenability, and toughness. It has improved pitting corrosion resistance, especially by sulfur and chlorides.
Alloy 660-grade type 2 has great machinability, and thus, these bars are ready to machine than nickel-based precipitation hardening grades or other alloys. It also has higher creep and good corrosion resistance properties, making it more popular in the manufacturing industry.
Its scaling resistance in the air is up to 800 degrees Celsius. These bars have marked the degree of general corrosion resistance.
Uses of the ASTM A638 round bars:
These 660 types 2 alloy round bars are one of the ranges of steels specifically fabricated for moderate-temperature applications. It is a very popular grade for manufacturing round bars for architectural applications.
These bars are extensively utilized in most high-stress component conditions in the chemical processing industries.
Specification : ASTM A638/ ASME SA638
Dimensions: DIN, EN, ASTM, JIS, ASME, BS, AISI
Round bar size : Diameter: 3-~800mm
Flat bar size : Thickness: 2 -100mm, Width: 10 to 500mm
Rectangular Bars Section : 3.0 to 12.0mm thickness
Billet Size: 1/2 to 495mm Diameter
Rectangles Size : 33 x 30mm to 295 x 1066mm
Hollow Bar : 32mm OD x 16mm ID to 250mm OD x 200mm ID)
Finish :Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black
Surface : Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline,Polished
Condition : Hardened & tempered, annealed
Technique : Stainless Steel Cold Drawn, Hot Rolled, Forged Round Bar,Cold Rolled, Rod
Processing : Bar cutting to 650mm
Form : Rod, Round, Channel Bar, T-Bar, Flat Bar, Precision Ground Bar, Blocks, Square, Rings, Round Rod, Triangle, Hollow, Rectangle, Threaded, Hex (A/F), Profiles, Half Round Bar, Ingot, Billet, I/H Bar, Forging etc.
|BD||Bright drawn||SRE||Slit rolled edge|
|CG||Centreless ground||HF||Hot finished|
|CF||Cold finished||HRAP||Hot rolled annealed and pickled|
|P&T||Peeled and turned||RT||Rough turned/peeled|
|ST||Smooth turned||PR||Peeled and reeled|
|Min/Max||0,03-0,08%||13,5-16,0%||1,00-2,00%||1,00-1,50%||24,0-27,0%||max. 0,025%||max. 0,015%||max. 1,00%||1,90-2,30%||0,10-0,50%||Alg/tot 0,35; B 0,003-0,010%|
|Mechanical properties at temperatures|
|Yield point||Re (MPa)||>592||>580||>570||>560||>550||>530||>520||>510||>500||>490||>460||>430||>380||>295||>200|
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