Tel: +86-0311-89642206 | Email:

Inconel X-750 Bars & Forgings (ASTM B637 UNS N07750)

The Inconel X-750 bar or forging refers to the precipitation-hardening nickel alloy bar or forging manufactured to ASTM B637 UNS N07750. It should be either hot worked or cold worked and is primarily used for high-temperature service.

Inconel X-750 (ASTM B637 Gr. N07750) round bars

Inconel X-750 (ASTM B637 Gr. N07750) round bars, hot rolled, after solution & aging heat treatment.

Chemical Composition of Inconel X-750 Bar & Forging

*All values are in % unit.

Heat Treatment for Inconel X-750 Bar & Forging

Bars or forgings of ASTM B637 Gr.N07750 can be categorized into 3 types according to heat treatment furnished.

  • N07750 Type 1: for service above 1100°F [593°C]; first, solution treated at 2100±25°F [1149±14°C], hold 2~4 hours, air cool; then, stabilizing treated at 1550±25°F [843 ± 14°C], hold 24 hours, air cool; finally, precipitation hardening treated at 1300±25°F [704 ± 14°C], hold 20 hours, air or furnace cool.
  • N07750 Type 2: for service up to 1100°F [593°C]; first, solution treated at 1800±25°F [982±14°C], hold minimum 0.5 hours, air cool or faster; then, precipitation hardening treated at 1350±25°F [732±14°C], hold 8 hours, furnace cool to 1150±25°F [621±14°C], hold until total precipitation heat treatment has reached 18 hours, air cool.
  • N07750 Type 3: first, solution treated at 1975–2050°F [1079–1121°C], hold 1~2 hours, air cool; then precipitation hardening treated at 1300±25°F [704±14°C], hold 20~24 hours, air cool.

Mechanical Properties of Inconel X-750 Bar & Forging

Alloy UNSTensile Strength, min.Yield Strength, min.ElongationReduction of AreaBrinell Hardness
N07750ksiMPaksiMPamin. %min. %HB
*Type 1140965906208-≥262
*Type 2a17011701157901818302~363
*Type 2b17011701157901515302~363
*Type 3160~1851103~1276100~130689~8962020267~363
*Type 1:  solution at 2100°F [1149°C] + stabilize + precipitation hardening.
*Type 2a: solution at 1800°F [982°C] + precipitation hardening, for diameter < 2.5″ [63.5 mm].
*Type 2b: solution at 1800°F [982°C] + precipitation hardening, for 2.5″ ≤ diameter < 4″ [63.5 mm ≤ d < 101.6 mm].
*Type 3:  solution anneal at 2000°F [1093°C] + precipitation hardening.

Stress-Rupture Requirements of Inconel X-750 Bar & Forging

When the ASTM B637 Gr. N07750 bar or forging is supplied in the solution treated plus aged condition(precipitation hardening), it shall take the stress-rupture test: for N07750 Type 1 with heat treatment of solution + stabilizing + precipitation hardening, at test temperature of 1350°F [732°C] & under a stress of 45 ksi [310 MPa], the practical time period for rupture shall be no less than 100 hours with minimum 5% elongation.



Related Items

  • Product Categories

  • Contact Us

    Hebei Metals Industrial Limited
    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
    No. 176, Zhonghua South Street, Shijiazhuang, China.
    Tel: +86-311-89642206