AISI 4140 Alloy Steel Custom AISI 4140 Alloy Steel Structual

AVAILABLE SIZE:
Round bar: Diameter(mm) Max 800mm; Length(mm) Max 12000mm.
Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm.
Condition: Cold rolled(drawn)≤50mm, Hot rolled≤12-250mm, Hot forged≥50mm.
 
AISI 4140/DIN 1.7225 Introduction:
AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy
steel. It has high fatigue strength, abrasion and impact resistance, toughness,
and torsional strength.
 
Fabrication and Heat Treatment:
1. Forging
Preheat the steel carefully, then raise the temperature to 1150-1200°C for
forging. Do not forge below 850°C.
2. Annealing
Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to
be thoroughly heated. Cool slowly in the furnace to 480°C followed by air
cooling.
3. Stress Relieving
When parts are heavily machined, ground or otherwise subject to cold work,
stress relieving will be beneficial prior to hardening.
4. Hardening
AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further
heat treatment is required annealed AISI 4140 should be heated slowly to 840-
875°C and after adequate soaking at this temperature quench in oil. Temper as
soon as the tools reach room temperature.
5. Tempering
Heat the AISI 4140 carefully to a suitable temperature selected by reference to
a tempering chart or table (usually between 550-700°C, soak at the temperature
for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering
between 250-375°C is not advised as tempering within this range will seriously
reduce the impact value.
6. Surface Treatment
Plate: Origin Black, Orign cold rolled bright, Machined, Grinded
Bar: Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded

ABOUT US:
We specialize in 4140 and 4340 steels, which are versatile and have many
advantages for a variety of industrial applications. Knowing the differences
between them will help you choose the one that best suits your needs.
  ​Our advantages: Focus on the steel industry for more than ten years, strong
factories, professional services, ensure quality, customize according to
customer requirements, factory prices, fast transportation,Good after-sales
service, pleasant cooperation, high repurchase rate and so on.
We offer a wide range of information and high quality steel products on 4140
and 4340 steel, for more information on our 4140 and 4340 steel products,
please contact us today. To discuss pricing details, please request a quote.

CONTACT US:
MiKi Zhuo
E-mail:jacklu@songshunsteel.com
Skype/W , hatsapp/Wechat:+86-18269260283
ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong
Province, P.R.C China
For more 4140 steel product information, please click this link:
https://steelpurchase.com/4140-scm440-172 , 25-steel/
songshunmoldsteel41404340

Minimum Order: 5 tons

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