Hastelloy B2 Round Bars are made from a nickel-base alloy specifically formulated to resist aggressive non-oxidizing acids. Known chemically as UNS N10665, this alloy exhibits exceptional resistance to hydrochloric acid, sulfuric acid, acetic acid, and phosphoric acid, even under extreme conditions. The alloy’s low carbon content prevents grain boundary carbide formation, making it ideal for welded assemblies. Physical and mechanical properties are maintained per ASTM B335 / ASME SB335 standards.

At SMM Industries LLP, we understand the needs of chemical process engineers, and our Hastelloy B2 round bars are carefully heat treated and solution-annealed to achieve excellent toughness, ductility, and corrosion resistance.

Hastelloy B2 is a nickel-molybdenum alloy engineered with approximately 26–30 % molybdenum, up to 2 % iron, up to 1 % chromium, and a low carbon content around 0.01–0.02 %. This composition gives it outstanding resistance to reducing acids and prevents sensitization in welding zones. It maintains structural integrity even at elevated temperatures (up to about 538 °C in air, and higher in reducing atmospheres).

One of the key benefits of working with SMM Industries LLP is that we are more than just suppliers: we are Hastelloy B2 Round Bars Manufacturers, meaning each bar meets rigorous in-house quality, heat-treatment, and dimensional tolerances before being released.

The superior performance of Hastelloy B2 round bars can be credited to several advantages: Excellent corrosion resistance in reducing acids: It stands up to hydrochloric, sulfuric, acetic, and phosphoric acids even in concentrated form. High mechanical strength and toughness: Solution annealed material provides good tensile and yield strength—typical tensile strength of 690–760 MPa.

Weldability: Very low carbon prevents grain-boundary carbide precipitation, making welded joints and heat-affected zones stable. Thermal stability: Suitable for service up to ~538 °C in oxidizing atmosphere, and even higher in reducing gas environments. Stress-corrosion cracking resistance: It resists pitting, stress-corrosion cracking, and knife-line attack.

Hastelloy B2 round bars are used in a variety of high-demand applications, thanks to their corrosion resistance and mechanical robustness:

• Chemical processing equipment: Ideal for reactors, heat exchangers, and acid transfer systems where hydrochloric acid resistance is critical.

• Vacuum furnace components: Used in vacuum furnace rods and internal parts due to its ability to withstand reducing environments and high temperatures.

• Pressure vessels: Suitable for storage or reaction vessels in acid manufacturing plants, particularly for sulfuric or phosphoric acid processes.

• Pharmaceutical manufacturing: Employed in acidic chemical reactors for processes involving acetic or hydrochloric acid.

• Oil & gas infrastructure: Acts in downstream equipment that operates with reducing acids, such as certain refining units and acid pickling lines.

• Electronics and semiconductor plants: Used in etching or cleaning systems where strong acids are part of material processing.

In its role as Hastelloy B2 Round Bars Stockists, SMM Industries LLP maintains an inventory that supports quick turnaround for these critical applications, minimizing lead times and supply risk.

In addition to manufacturing, SMM Industries LLP also acts as Hastelloy B2 Round Bars Suppliers, stocking a wide range of sizes, lengths, and diameters to meet project needs.

Hastelloy B2 round bars are specified under multiple global standards and grades, enabling compatibility across different markets: ASTM / ASME: ASTM B335 / ASME SB335 for bar; ASTM B622 / ASME SB622 for seamless pipe; ASTM B619 / SB619 for welded pipe. UNS: N10665, European / DIN: Werkstoff-Nr. 2.4617, ISO: NiMo28, JIS / Japanese: NW0665, In some countries it may also be referred to by local equivalents, for example in Germany as Werkstoff 2.4617, or in other standards as UNS N10665.

As Hastelloy B2 Round Bars Exporters, SMM Industries LLP ships globally, ensuring that clients in North America, Europe, Asia, and the Middle East can access these round bars meeting all necessary international specifications.

Choosing SMM Industries LLP means partnering with a company that not only understands the metallurgical demands of ASTM B335 / ASME SB335 grade nickel-moly alloys but also values customer service, traceability, and on-time delivery.