4140 alloy steel bar hot sale 4140 alloy steel bar price per kg

4140 steel, this steel has good workability, small processing deformation, good
fatigue resistance, is a medium hardenability steel, 4140 has good strength and
good comprehensive mechanical properties after heat treatment, good
workability, yield High. The maximum use temperature is 427 degrees Celsius.
4140 strength, high hardenability, good toughness, small deformation during
quenching, high creep strength and lasting strength at high temperature. It is
used to manufacture forgings that require higher strength and larger quenched
and tempered section than 35CrMo steel, such as large gears for locomotive
traction, supercharger transmission gears, rear axles, connecting rods and
spring clips that are heavily loaded, and can also be used for Drill pipe
joints and fishing tools for oil wells below 2000m, and can be used for molds
of bending machines.

ASTM 4140 Surface Treatment and Heat Treatment
1.Surface Treatment
Plate:Origin Black,Orign cold rolled bright, Machined,Grinded
Bar:Origin Black,Orign cold rolled(drawn) bright,Turned,Peeled,Grinded
Heat treatment specification
Heat treatment standard: quenching at 850℃, oil cooling; tempering at 560℃,
water cooling, oil cooling;

4140 Steel Applications
It is used to manufacture forgings that require higher strength and larger
quenched and tempered sections than 35CrMo steel, such as large gears for
locomotive traction, supercharger transmission gears, rear axles, connecting
rods and spring clips that are heavily loaded, and can also be used for Drill
pipe joints and fishing tools for oil wells below 2000m, and can be used for
molds of bending machines, etc.                    

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)

FAQ
Q:Are you a factory or a trading company?
A: The fact is that we are a company. We have own factory and several
warehouses. Under the trend of globalization of the world, we established a
professional foreign trade department to change the world.
Q: What is your delivery date?
A: The delivery date is about 10-30 days after receipt of payment.
Q: Can I get some samples?
A: We are honored to offer you samples.
Q: What port do you usually ship from?
A: We have 3 common ports,Tianjin, Shanghai and Shen.
Q: What is the payment terms?
A: T/T is our priority, L/C is also OK for us.

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
contact 24 hours a day!!!
E-mail:jacklu@songshunsteel.com
Skype , /Whatsapp/Wechat:+86-18269260283
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Songshun Company Website:https://steelpurchase.com/
http://www.songshunsteel.com/
songshunsteel , 41404340

Minimum Order: 1 tons