Hastelloy C-276 Flat Bar

Chemical Composition

ASTM B574 holds nickel at 57.0% minimum and chromium between 14.5% and 16.5% for this flat bar, with molybdenum at 15.0–17.0% as the leading addition. Moreover, tungsten at 3.0–4.5% reinforces the passive film carried by this flat bar, while carbon at 0.010% maximum and silicon at 0.08% maximum starve the grain-boundary precipitates that embrittle welded joints.

For the complete element-by-element limits, open the composition breakdown held on the Hastelloy C-276 material page for this flat bar.

Mechanical Properties

The minimum room-temperature values below follow the rod and bar table of ASTM B574 for UNS N10276. Consequently, the ordered condition and hardness basis govern final acceptance of Hastelloy C-276 flat bar.

• ASTM B574 sets one solution-annealed condition for rod and bar at these minimums, and its Table 5 carries no hardness requirement at all. Moreover, clause 1.2.3 reaches cold-worked stock from 6.35 to 88.9 mm, where N10276 sits among the listed grades, so drawn and ground bar holds strength above the annealed floor. Therefore, sour-service orders travel with a per-heat hardness record against the 35 HRC ceiling rather than a mill hardness maximum.

Physical Properties

Published references place this flat bar at a density near 8.89 g/cm³ with a melting range of 1325–1370 °C. Moreover, the nickel-rich matrix keeps this flat bar practically non-magnetic at ambient temperature, which suits instrument and sensor assemblies. Besides, the solid-solution structure holds these values across the whole solution-annealed range.

Meanwhile, the physical properties table on the Hastelloy C-276 material page holds the modulus, the thermal expansion and the remaining design values behind this flat bar.

Heat Treatment

The water-quenched anneal is the specification-defining step for this grade, because rapid cooling after 1120–1160 °C restores the corrosion resistance the media demand. In addition, we supply this Hastelloy C-276 flat bar in whichever condition your duty calls for.

Standards

ASTM B574 is the principal rod and bar document for this flat bar, published by ASTM International, and its scope reaches eleven UNS numbers with N10276 among them. Moreover, ASME SB574 covers pressure equipment while its cold-worked clause governs drawn and ground stock of this flat bar. Besides, DIN 17752, ISO 9723 and VdTÜV 400 serve European and international orders.

Finally, the full standards list on the Hastelloy C-276 material page adds the pressure documents, the European designations and the remaining product documents behind this flat bar.

Dimensions

Dimensions of Hastelloy C-276 flat bar follow the manufacturing route, the document and the order quantity. Therefore, the table below lists typical supply ranges, so please confirm your sizes in the inquiry.

Available sizes of this Hastelloy C-276 flat bar depend on route, document, condition and lot size. Please confirm your required flat bar size, section and length in the inquiry.

ASTM B574 reaches rectangular bar within the ranges above, so tell us the finished width and thickness when you enquire. Moreover, flat-rolled stock outside these bar ranges follows the route set out on our Hastelloy C-276 plate and sheet page.

Surface Finishes

Finish decides how this flat bar behaves across wet chlorine streams, chlorine dioxide bleach plants and FGD scrubbers, and most stock ships solution annealed and pickled so the surface reaches your shop ready for acid service. Specifically, we fix the finish on this Hastelloy C-276 flat bar before the order is released.

Meanwhile, the surface finishes table on the Hastelloy C-276 material page lists the remaining conditions we quote for this flat bar.

Related forms from the same heat cover Hastelloy C-276 Forged Bar, Hastelloy C-276 Hex Bar and Hastelloy C-276 Round Bar when your flat bar order needs them.