Name: Factory Price 4140 Pre Hard Steel Bar Shaft
Brand: SongShun
Availability: InStock

Product Details

1.AISI 4140 Product Details

· Steel number: GB:42CrMo DIN:1.7225 JIS:SCM440 BS:708M40/708A42/709M40

AISI/ASTM/SAE: 4340 UNS:G41400

· keyword:4140 shaft,4140 steel bar,4140 pre hard

· Usage: 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.

· Other Steel Types:5140 /4140 / 4340 / 4142 / 15CrMo / 6150 / 38CrMoAI / 8620 .....

· Serve:OEM/ODM,Sample free and 24 hours online

· Delivery status:With heat treatment (normalized, annealed or high temperature tempered) or without heat treatment Goods, the delivery status should be specified in the contract

1.1 AISI/ASTM 4140 Chemical composition

C	0.38-0.45%	Cr	0.90-1.20%
Si	0.17-0.37%	Mo	0.15-0.25%
Mn	0.50-0.80%	Ni	≤0.30%
P	≤0.035%	S	≤0.035%

1.2 ASTM 4140 Mechanical Properties

Tensile Strength	σb (MPa):≥1080(110)
Yield Strength	σs (MPa):≥930(95)
Elongation	δ5 (%):≥12
Reduction	ψ (%):≥45
Impact Energy	Akv (J):≥63
Impact Toughness	akv (J/cm2):≥78(8)
Annealed Hardness	≤217HB

1.3 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.

1.4 Surface Treatment

Plate: Origin Black, Orign cold rolled bright, Machined, Grinded

Bar: Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded

1.5 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.

1.6 Applications

For main shaft of steamer,bilt for 400℃.Hummar shank.Bigger section than 35CrMo.Supper force.

1.7 Product Photo

2.Company Introduction

Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company with 2 warehouses that manufactures good & high quality kinds of steels starting from 2012. The company provides the customized products and OEM service. What´s more, we keep the mass stock of over 20000 tons. In those years, we offer a wide range of steels to our customers from all over the world. And we enjoy high praise among them.

3.Customer Photos

We warmly welcome new and old customers to establish good and long term relationship with us based on equality and mutual assistance.

4.Certifications

5.Product packaging

6.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.