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Annealing Hot Rolled Steel Bar Tensile Strength ≥1080MPa For Mechanical SAE4140

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China Guangzhou Changfeng Steel Co., LTD certification
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Annealing Hot Rolled Steel Bar Tensile Strength ≥1080MPa For Mechanical SAE4140

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Large Image :  Annealing Hot Rolled Steel Bar Tensile Strength ≥1080MPa For Mechanical SAE4140

Product Details:
Place of Origin: China
Brand Name: CF
Certification: ISO / Mill Certificate
Model Number: 1.7225 / SCM440 / SAE4140
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: for Customers' Request
Delivery Time: 15-20 days
Payment Terms: L/C, T/T
Supply Ability: 1000 tons/ month
Detailed Product Description
Technology: Hot Rolled / Forged / Clod Drawn Production Route: Ef / Eaf+Lf+Vd / ESR
Heat Treatment: Annealing / Q+T Test: SGS / Ut100% / Elements Testing
Shape: Round Bar Or Flat Bar Diameter: 35-260mm
Length: 3000-6000mm Payment: 30% Deposit,Blance By L/C At Sight Or T/T
High Light:

hot rolled steel flat bar


hot rolled steel round bar

1.7225 / SCM440 / SAE4140 Hot Rolled Alloy Steel Round Bar for Mechanical
1, Equivalent grades:


2, Perform Standard: GB/T 3077-1999


3, Available size(mm)

Flat Bar Size(mm)Round bar Size(mm)

Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based on agreements with customers.
4, 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.

5, 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)
6, Heat treatment:

Heating temperature/℃Cooling wayHardness (HRC)Tempering
Cooling wayHardness
840-880Oil Cooling≥53450-650Air cooling25-40

7, 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;

8, Ready Stock:
Round Bar diameter 35-260mm.All the sizes as require can be customerized as fresh production with MOQ.
9, Delivery state:
Hot rolled, black, hardness or tempered hardness:28-34 HRC.

10, Delivery time:
For abundant stock, 15-20 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.

11, Our service:

1) Sizes, materials and others are all at your requirements and can be changed;
2) Price varies on materials, dimensions, finish craft and different payments;
3) We are direct manufacture in machinery manufacturing work with experience of several decades;
4) Detail production design will be made according to information you offered;
5) We have adequate inventory, so that we can quick delivery;
6) The most important is that we have advanced equipment.
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Guangzhou Changfeng Steel Co., LTD

Contact Person: Echo

Tel: +86 18148729336

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