4140 plate supplier forged 4140 plate supplier product

AISI 4140 Steel Characteristics
1.It is low alloy steel with chromium, molybdenum, and manganese.
2.Great toughness, fatigue strength, abrasion and impact resistance.
3.It is widely be used in the industry due to its excellent versatility and
usefulness.
4.The higher carbon content in it, the higher the strength and heat treatment
capabilities it is.
5.It can be oil hardened to relatively high hardenability.

ASTM 4140 Steel Application
4140 steel is medium hardenability steel with good strength and good
comprehensive mechanical properties after heat treatment. It has good
manufacturability. The maximum temperature of use is 427 °C. It can be used to
make turbine fastener, tool bodies, forming dies, brake dies and etc. And it
also as the material of Oil deep well drill pipe joints and fishing tools below
2000m.

4140 Steel Round Bar Sheet Plate Heat Treatment
Machinability
At the annealed condition, 1.7225 alloy tool steel has good machinability.

Forming
DIN 1.7225 steel has high ductility. It can be formed using conventional
techniques in the annealed condition. It is required more pressure or force for
forming because it is tougher than plain carbon steels.

Welding
1.7225 alloy steel can be welded using all advanced techniques. But, the
mechanical properties of it will be affected if it is welded in the heat
treated condition, and post weld heat treatment should be performed.

Heat Treatment
1.7225 tool steel is heated at 845°C(1550°F) followed by quenching in oil.
Before hardening, it can be normalized by heating at 913°C (1675°F) for a
long period of time followed by air cooling.

Forging
It is forged at 926 to 1205°C(1700 to 2200°F)

Hot Working
4140 steel can be hot worked at 816 to 1038°C(1500 to 1900°F)

Cold Working
1.7225 steel can be cold worked using conventional methods in the annealed
condition.

Annealing
Heat it to 800℃ – 850℃, hold until temperature is uniform throughout the
section and cool in furnace.

Normalizing
Heat 1.7225 alloy steel to 870℃ – 900℃, hold it until the temperature is
uniform throughout the section, soak for 10 – 15 minutes and cool in still
air.

Tempering
DIN 1.7225 steel can be tempered at 205 to 649°C (400 to 1200°F) depending
upon the desired hardness level. The hardness of the steel can be increased if
it has lower tempering temperature. For example, tensile strength of 225 ksi
cab be achieved by tempering at 316°C (600°F), and tensile strength of 130
ksi can be achieved by tempering at 538°C (1000°F).

Hardening
DIN 1.7225 alloy steel can be hardened by cold working, or heating and
quenching.

Test
How is SAE 4140 steel tested?

Our AISI 4140 steel round bar and steel plate composition detection is carried
out by a spectrometer, which is fast, accurate and efficient in detection;
hardness is tested by a hardness tester,
The hardness tester is based on the Leeb hardness measurement principle, which
can easily and quickly measure a variety of metal materials. While displaying
the hardness measurement value immediately, it can be freely converted between
different hardness scales, and the tolerance limit can be set in advance, and
it will automatically alarm when it exceeds the range.
1. Measuring range: (170-960)HLD,(17-68.5)HRC,(19-651)HB,(80-976)HV,(3 , 0-100)HS,
(59-85)HRA(13-100 )HRB
2. Measurement direction: support 360° (vertical down, oblique down,
horizontal, oblique up, vertical up)
3. Hardness scale: Richter (HL), Brinell (HB), Rockwell B (HRB), Rockwell C
(HRC), Rockwell A (HRA), Vickers (HV), Shore (HS)
4. Display: quarter dot matrix LCD
5. Data storage: maximum 500 groups (impact times 32 to 1)
6. Working voltage: 3V (2 AA size alkaline batteries connected in series)
7. Continuous working time: about 100 hours (when the backlight is not turned
on)

Songshun specialized in Special Steel for almost 20 years. We can supply mold
steel, high speed steel, alloy steel, free cutting steel and etc.Welcome your
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Minimum Order: 1 tons

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