GH4145 (Inconel X-750) Precipitation-Hardened Nickel-Based Superalloy Bars

I. Core performance characteristics of GH4145 alloy rods

1. High temperature stability

(1) Maintain high strength below 800℃, with a yield strength of 1200MPa (at 1000℃)

(2) Excellent oxidation resistance below 980℃, and a dense Cr₂O₃ protective film can be formed after long-term use

(3) Outstanding relaxation resistance below 540℃, with a stress relaxation rate of only 0.015%/h (600℃)

2. Mechanical and processing properties

(1) Density 8.25g/cm³, hardness HRC30-35 (aged state)

(2) Cold working hardening rate is similar to that of austenitic stainless steel, supporting forging, rolling and other forming processes

(3) Good welding performance, suitable for various connection methods such as argon arc welding and resistance welding

3. Corrosion resistance

Nickel-chromium matrix (Ni≥70%, Cr14-17%) gives it the ability to resist chloride stress corrosion

Performs better than ordinary stainless steel in acidic media and is suitable for chemical equipment

II. Main application areas

1. Aerospace

(1) Aircraft engine high temperature resistant springs (flat/helical springs) and bolt fasteners below 800℃

(2) Gas turbine turbine blades and rotor structural parts, bearing high frequency thermal fatigue loads

2. Energy equipment

(1) Steam turbine subcritical unit fastening bolts (677℃ long-term service)

(2) Nuclear reactor pressure vessel support components, resistant to radiation embrittlement

3. Industrial special components

(1) Petrochemical high temperature and high pressure reactor internal components

(2) Rocket engine thrust chamber heat-resistant brackets

(3) Elastic sealing molds (such as gas seals, electric heating blades)