Hot Forged Q+T Special Tool Steel Solid Round Bar High Fatigue Strength

Hot Forged Q+T Black Surface Alloy Steel Round Bar SAE4140 SCM440 42CrMo 1.7225 EN19

Equivalent grades:

SAE 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.

Chemical Composition(%)

Application
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.

Feature
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase hardenability;
5) Chromium molybdenum high tensile steel with yield strength of 550N/mm2.

Recommend heat treatment:

Mechanical Properties:
Tensile strength:σb (MPa): ≥1080(110)
Yield strength:σs (MPa): ≥930(95)
Elongation:δ5 (%): ≥12
Section shrinkage:ψ (%): ≥45
Impact work:Akv (J): ≥63
Impact toughness value:αkv (J/cm²): ≥78(8)

Ready Stock:
Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.

Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness: 28-34 HRC.
Annealing: HBS<=235.

Product pictures:
Hot Forged Q+T Alloy Steel Special Steel SAE4140 SCM440 42CrMo 1.7225 EN19

Delivery time
For abundant stock, 15-20 days.For customized products, 30-35 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.

Our service for you
Pre-sale service

1) Sample can be offered with sample charge can courier fee by buyer's side;

2) We have full stock, and can deliver within short time. Many styles for your choices;

3) Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you;

3) All of our products are produce by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.

After you choose

1) We will count cheapest shipping cost and make invoice to you at once;

2) Check quality again, then send out to you at 1-2working day after your payment;

3) Email you the tracking no, and help to chase the parcels until it arrive you.

After-sale choose

1) We are very glad that customer give us some suggestion for price and products;

2) If any question, please contact with us freely by e-mail or telephone.

Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.With twenty years experience in special steel industry, our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.

To ensure provide high quality products to customers, we have close cooperation with many Chinese first class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, Daye Special Steel. We have thousand tons of stock materials in our own factory and also can provide processing services to customers. We are full of export experience for many years, the product covers America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.

After years of development, the company has established a complete quality management and export service system. We have a group of experienced and competent elites and is capable of offering the best service to clients. Our company equips with large-sized Vertical saw machines, Horizontal saw machines, Milling machines, Grinding machines and other advanced equipments to provide customers with cutting and other processing services. All the products should be inspected the metallographic analysis, hardness, ultrasonic flaw detection and other strict inspection processes, which meet the standards of DIN, AISI, JIS and GB to ensure their function and quality.

Our company keeps the principle of “sincerely cooperation, endless striving for perfection”. We desire to establish the long-term mutual beneficial and win-win relationship with clients all over the world.