4140 / 1.7225 / 42Crmo / 42Crmo4 Equivalent Steel Grade Chrome Moly Steel Block

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

Dongguan Songshun Mould Steel Co.,Ltd.is located in Chang'an Town -the famous town of
mold in Pearl River Delta of China.After 15 years' development,now we have the capacity to
provide complete services from manufacturing and marketing to distributing.The main grades
of tool steel and special steel which we market are listed as follows:

Hot work steel:H13,H21,1.2714,etc.
Cold work steel:D2,D3,D6,01,A2,etc
Plastic Mould Steel:P20,1.2738,1.2083,1.2767,1.2312,1.2316 etc.
HSS:M2,M35,M42,etc.
Alloy Steel:4140,42CrMo4,4130,4340,8620,5140,5160,6150,4135,52100,etc
Carbon Steel:Q235,Q345,1045,1084,etc

As a large-scale wholesaler and retailer,we have the excellent service organization and
first-class marketing personnel.We have been specialized in domestic and overseas markets
for many years,and have established qood and stable business relationships with many overseas clients.

Because of our high-quality products,timely delivery,competitive price and good service,we have won high praises from all our customers.

We always insist on the idea of "The quality is first,the is supreme",and inherit the principle of \"equality,equity and reciprocity".We sincerely hope to cooperate withmore importers,and make
progress together.

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:OEM is acceptable? 
A:Yes. We are good at steel making since 2002 with complete production equipments. Share your new project with us, we will help you to solve it.

Q:What are the difference between you and other steel company?

A:Quality first! The price will be changed according to your order. The rechargeable sample's will return to you after you offer the deposit!Our company are full of chinese culture,Won't you want to come here?