{"id":2042,"date":"2026-03-14T10:21:24","date_gmt":"2026-03-14T02:21:24","guid":{"rendered":"https:\/\/haoyumaterial.com\/?post_type=product&p=2042"},"modified":"2026-03-14T12:44:19","modified_gmt":"2026-03-14T04:44:19","slug":"4340-alloy-steel-machined-parts","status":"publish","type":"product","link":"https:\/\/haoyumaterial.com\/tr\/product\/4340-alloy-steel-machined-parts\/","title":{"rendered":"4340 Ala\u015f\u0131ml\u0131 \u00c7elik Makineli Par\u00e7alar Y\u00fcksek Dayan\u0131ml\u0131 \u00d6zelle\u015ftirilmi\u015f CNC"},"content":{"rendered":"

Why Choose Vastmaterial for 4340 Steel Machining?<\/h2>\n

Machining high strength alloy steel fabrication isn’t easy. Managing rapid tool wear while holding precise dimensions on tough, heat treated 4340 steel parts requires deep technical expertise and serious hardware. If you need reliable 4340 alloy steel machined parts<\/strong>, we deliver.<\/p>\n

We leverage decades of experience to tackle the toughest UNS G43400 machined parts, ensuring your high-stress components perform flawlessly under pressure.<\/p>\n

Our Core Machining Capabilities<\/h3>\n\n\n\n\n\n\n\n\n
Advantage<\/th>\nWhat We Deliver<\/th>\n<\/tr>\n<\/thead>\n
Decades of Alloy Expertise<\/strong><\/td>\nProven strategies for managing tool wear and maintaining exact precision on tough 4340 nickel-chromium-molybdenum steel<\/strong>.<\/td>\n<\/tr>\n
State-of-the-Art Equipment<\/strong><\/td>\nHigh-rigidity CNC turning and advanced 5-axis milling centers built specifically to cut hardened alloys without chatter.<\/td>\n<\/tr>\n
Uncompromising Precision<\/strong><\/td>\nAchieving extremely tight tolerances down to +\/- .005 mm<\/strong> with high repeatability for aerospace grade 4340 machining.<\/td>\n<\/tr>\n
Scalable Production<\/strong><\/td>\nComplete flexibility, handling everything from rapid prototyping of custom 4340 CNC machining to high-volume production runs.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

We remove the risk from sourcing tight tolerance alloy steel components, giving you exactly what you need, right on spec, every single time.<\/p>\n

AISI 4340 Material Specifications & Properties<\/h2>\n

\"4340<\/p>\n

What is 4340 Alloy Steel?<\/h3>\n

When we produce 4340 alloy steel machined parts<\/strong>, we rely on its unique nickel-chromium-molybdenum composition. This specific blend creates a deep-hardening steel known for its exceptional toughness, high fatigue resistance, and overall structural integrity. Whether we are handling aerospace grade 4340 machining or heavy-duty industrial components, this material stands out because it retains its high strength even under extreme stress and impact.<\/p>\n

4340 Chemical Composition<\/h3>\n

The raw strength of our AISI 4340 steel components comes directly from its precise chemical makeup. Here is the standard breakdown:<\/p>\n\n\n\n\n\n\n\n\n\n
Element<\/th>\nPercentage (%)<\/th>\n<\/tr>\n<\/thead>\n
Nickel (Ni)<\/strong><\/td>\n1.65 – 2.00<\/td>\n<\/tr>\n
Chromium (Cr)<\/strong><\/td>\n0.70 – 0.90<\/td>\n<\/tr>\n
Manganese (Mn)<\/strong><\/td>\n0.60 – 0.80<\/td>\n<\/tr>\n
Carbon (C)<\/strong><\/td>\n0.38 – 0.43<\/td>\n<\/tr>\n
Molybdenum (Mo)<\/strong><\/td>\n0.20 – 0.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4340 Mechanical Properties<\/h3>\n

To get the most out of high strength alloy steel fabrication, proper processing is key. The mechanical properties of 4340 change significantly once heat treated, allowing us to hit tight tolerances and specific performance metrics for your UNS G43400 machined parts.<\/p>\n\n\n\n\n\n\n\n\n
Property<\/th>\nAnnealed (Standard)<\/th>\nHeat Treated (Typical Range)<\/th>\n<\/tr>\n<\/thead>\n
Tensile Strength<\/strong><\/td>\n~ 745 MPa<\/td>\n1000 – 1300+ MPa<\/td>\n<\/tr>\n
Yield Strength<\/strong><\/td>\n~ 470 MPa<\/td>\n850 – 1200+ MPa<\/td>\n<\/tr>\n
Elongation<\/strong><\/td>\n22%<\/td>\n12% – 15%<\/td>\n<\/tr>\n
Hardness (HRC)<\/strong><\/td>\n~ 22 HRC<\/td>\n30 – 50+ HRC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(Note: heat treated values depend heavily on the specific quenching and tempering process applied to the custom 4340 CNC machining project.)<\/em><\/p>\n

Industry Applications for 4340 Machined Components<\/h2>\n

\"4340<\/p>\n

We manufacture high-strength, wear-resistant 4340 alloy steel machined parts<\/strong> for industries that push materials to their absolute limits. When your project demands extreme toughness and reliability under immense pressure, our high fatigue resistance steel parts get the job done.<\/p>\n