AISI / SAE 8620 steel is an alloy chrome-nickel-molybdenum with hardness capabilities, therefore exhibits uniform surface hardness as well as high toughness at the core.

The presence of nickel and molybdenum in the right quantities is a key factor in the balance of properties on 8620 steel and its effect is more important when you increase the size of the piece.

For machining operations where the amount of material removed is not much, it is economical to use this steel in hot rolled condition.

Applications:

• Grooved shafts
• Piston Pins
• Bushings
• Sprockets for gearboxes
• Crankshafts
• Torsion bars
• Hand Tools
• Screws
• Nuts
• Gears
• Pins
• Engine Bearings
• Discs

Mechanical properties:

• Brinell hardness: 140-170
• Rockwell B Hardness: 78-86
• Machinability * 65-85% (* AISI grade 1212 taken as 100%)

Chemical composition (content %):

• Coal: from 0.18 to 0.23 // Silicon: from 0.15 to 0.35 // Nickel: 0.40 to 0.70 // Chromium: 0.40 to 0.60 // Manganese: 0.70 to 0.90 // Molybdenum: 0.15 to 0.25 // Max. Phosphorus: 0.035 // Max. Sulphur 0.040

Heat Treatment:

• Anneal at 840 ° C – 850 ° C // Temper at 530 ° C – 670 ° C

AISI / SAE 4140 steel is a medium carbon steel, alloyed with chromium and molybdenum to provide high hardenability, good resistance to fatigue, corrosion and impact. This steel can be nitrided to give greater resistance to corrosion. Is amenable to hardening by heat treatment.

This alloy has good hardness penetration and uniform hardness. Its high machinability and ability to maintain its properties at high temperatures make this alloy useful in many industries.

Applications:

• Valves
• Asparagus
• Sprockets
• Scissors
• High Strength Bolts
• Guides
• Servers Leva
• Chisels
• reducing Axles
• Joints
• Axles
• Drill Collars
• Kindred piston

Mechanical properties:

• Brinell hardness: 275-320
• Rockwell C Hardness: 28-34
• Effort creep: 690 MPa (100 ksi)
• Maximum Effort: 900 – 1050 MPa (130-152 KSI)
• Minimum elongation: 12%
• Reduction of minimum area: 50%
• * Machinability: 66% (* AISI grade 1212 taken as 100%)

Chemical composition (content %):

• Coal: 0.38 to 0.43 // Silicon: from 0.15 to 0.35 // Chrome: 0.80 – 1.10 // Manganese: 0.75 – 1.00 // Molybdenum: 0.15 to 0.25 // Max. Phosphorus: 0.04

Heat Treatment:

• It is austenized at temperatures between 830-850 ° C
• Oil quenched.
• Temper for two hours at 200 ° C for 57 HRc hardness or at 315 ° C for a hardness of 50 HRC.
• Annealing should be done between 680-720 ° C maintaining for two hours, then cooled to 15 ° C per hour to 600 ° C and cooling in still air.
• For stress relief heat between 450-650 ° C and maintained between 1.2 and 2 hours. Cool in the oven up to 450 ° C and then allow it to cool in still air.

AISI / SAE 4130 steel consists of chromium and molybdenum providing high weldability and is subject to different thermal treatments. Has low corrosion resistance but can be nitrated to achieve greater corrosion resistance.

Applications (Automotive):

• Connectors rods
• Crankshafts
• Axles for trailers
• Arrows and power transmission
• Tubes

Applications (Oil Industry):

• Bits
• Drills
• Drill Collars
• Arrows piston
• Pump Parts

Mechanical properties:

• Brinell hardness: 229
• Hardness Rockwell B: 98.2
• * Machinability: 45-75% (* AISI grade 1212 taken as 100%)

Chemical composition (content%):

• Coal: // Silicon 0.27 to 0.34: 0.15 to 0.40 // Chrome: 0.80 – 1.15 // Manganese  0.35 to 0.60 // Molybdenum 0.15 to 0.25 // Phosphorus 0.04

Heat Treatment:

• Standard: Heat to 900 ° C and air cool.

ASTM A36 steel is a carbon steel commonly used for building structures.

Applications:

• Metal structures
• Bridges
• Communication Towers
• Fuel tanks
• Electrical Hardware

Chemical Composition (Content %)

• Maximum Coal: 0.26 // Copper: 0.2 // Manganese: 0.75 // Phosphorus: 0.04 // Sulphur: 0.05

AISI / SAE 1018 steel is a steel low-medium carbon steel with better weldability and machinability than lower carbon steels. Because of its high tenacity and low mechanical strength is commonly used to machine components. Offering both high dimensional accuracy and superior surface finish.

Its good ductility makes it suitable for bending and cold forming and its low carbon exhibits excellent forgeability. Although machinability is lower compared with that of the 11XX and 12XX series.

Applications:

• Wedges
• Rivets
• Rollers
• Sprockets
• Pins
• Screws

Mechanical properties:

• Brinell hardness: 126
• Hardness Rockwell B: 72
• Effort creep: 370 MPa (53700 psi)
• Maximum stress: 440 MPa (63800 psi)
• Maximum Elongation: 15% (50 mm)
• Reduction of area: 40%
• * Machinability: 76% (* AISI grade 1212 taken as 100%)

Chemical composition (content%):

• Coal: 0.15 to 0.20 // Mn: 0.60 to 0.90 // Max. Phosphorus: 0.04

Heat Treatment:

• Standard: Heat to 925 ° C and air cool // Annealing: Heat to 885 ° C and cool in the furnace to 650 ° C // Temper at 150 ° C for one hour.

AISI / SAE 1045 steel has higher resistance than 1018 as a result of higher carbon content. It´s the most popular medium steel carbon. Used when strength and toughness are needed in the supplied condition. It can be forged and has good weldability, its hardness and toughness are suitable for manufacturing machinery components.

Applications:

• Sprockets
• Wedges
• Axles
• Screws
• Agricultural tools
• Rivets
• Machinery parts

Mechanical properties:

• Brinell hardness: 163
• Hardness Rockwell B: 85
• Effort creep: 310 MPa (45,000 psi)
• Maximum stress: 565 MPa (81900 psi)
• Elongation: 16% (in 50 mm)
• Reduction of area: 40%
• * Machinability: 57% (* AISI grade 1212 taken as 100%)

Chemical Composition (Content%):

• Coal: 0.43 to 0.50 // Manganese 0.60 to 0.90 // Max. Phosphorus: 0.04

Heat Treatment:

• Normalize at 900 ° C // Anneal at 790 ° C

AISI / SAE 1117 steel is a steel that provides greater strength and better machinability than the 1018. It has good ductility. It is a steel with high manganese content which provides great machinability and good mechanical properties. It is suitable for workpieces which are subsequently subject to carburization process. With this addition a good surface hardness of the carburized part retains a ductile core. It is ideal for manufacturing parts subject to shock or vibration stress. This steel is available as a leaded steel (11L17) in certain sizes. The addition of lead to a 0.15 / 0.35 percent improves machining properties.

Applications:

• Gears
• Sprockets
• Pivots

Mechanical properties (Cold drawing 1 “Ø)

• Brinell hardness: 156
• Hardness Rockwell B: 84
• Reduction of minimum area: 50%
• * Machinability: 90% (* AISI grade 1212 taken as 100%)

Chemical Composition (Content%)

• Max. Coal: 0.14 to 0.20 // Manganese: 1.00 – 1.30 // Phosphorus: 0.04 // Silicon 0.15 to 0.30 // Sulphur: 0.08 to 0.13

Heat Treatment:

• Carburize at 900 ° -955 ° C, using water or oil for cooling and temper at 150 ° C.

AISI / SAE 1141 steel has better machinability than 1045. Quenched and tempered it has higher resistance and its high sulfur content provides good machinability.

Applications:

• Axles
• Screws
• Snaps

Mechanical properties:

• Brinell hardness: 192
• Hardness Rockwell B: 91
• Reduction of minimum area: 38%
• * Machinability: 70% (* AISI grade 1212 taken as 100%)

Chemical Composition (Content %)

• Max. Coal: from 0.37 to 0.45 // Manganese: 1.35 – 1.65 // Phosphorus: 0.04 // Sulphur: from 0.08 to 0.13

AISI / SAE 12L14 steel provides easy machining due to the presence of lead. To manufacture products with high speed machinery is an excellent option.

Has a flexible and resistant core, with minimal distortion experienced during heat treatment, this steel provides a combination of toughness, hardness and impact resistance not found in lower carbon steel grades.

Applications:

• Gears
• Sprockets
• Axles
• Nuts
• Piston Pins
• Aircraft Parts
• Bearings

Mechanical properties:

• Brinell hardness: 163
• Hardness Rockwell B: 72
• Effort creep: 415 MPa (60200 psi)
• Maximum stress: 540 MPa (78300 psi)
• Maximum Elongation: 10%
• Reduction of minimum area: 35%
• * Machinability: 160% (* AISI grade 1212 taken as 100%)

Chemical Composition (Content%):

• Max. Coal: 0.15 // Lead: // 0.15-0.35 Manganese: 0.85 – 1.15 // Phosphorus: 0.04 to 0.09 // Sulphur: 0.26 to 0.35

Heat Treatment:

• Anneal at 840 ° C – 850 ° C // Temper at 530 ° C – 670 ° C