Alloy Steel 8630 offers users good mechanical properties, as well as weldability by most common methods. This popular alloy works well with hot forging and rolling, in addition to annealing.
The hardenability limitations of this grade (depth to which it will harden / obtain the specified mechanical properties after heat treatment) must always be taken into account when designing and selecting equipment.

Application
Alloy Steel 8630 is utilized for various critical structural parts such as:
• Gears
• Ring gears
• Shafts and crankshafts
• Connectors, hangers, and block valves for the oil industry

Heat Treatment
Annealing: For optimum machine ability of this alloy, a microstructure consisting of coarse pearlite and a minimum of ferrite is considered to be optimum. Such a structure can be obtained by austenitizing at 1550ºF (845ºC), furnace cooling to 1350ºF (730ºC) then to 1180ºF (640º) at 20ºF/hr. An alternative is an iso-anneal at 1225ºF (660ºC)
Normalizing:1600ºF (870ºC) and air cool.
Hardening: The alloy will be austenitized at around 1525 – 1600ºF (830 – 870ºC) and oil or water quenched depending upon section size and intricacy.
Tempering: to desired hardness, using temperatures based on past experience, following water or oil quench.

Forming Option
• Hot rolling process
• Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging

Heat-treatment Option
+A: Annealed (full/soft/spheroidizing)
+N: Normalized
+NT: Normalized and tempered
+QT: Quenched and tempered (water/oil)

Surface Option
• Black Surface
• Grounded: Bright but rough; Not precision
• Machining for plate: Bright and precision; Little turning scar
• Peeled/Turned: Bright and precision; Little turning scar
• Polished: Very Bright and precision size; Not turning scar

Mill test certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.