1.7225/SCM440/SAE4140 Alloy Steel Round Bar for Mechanical

Model NO.: 1.7225, SAE4140, SCM440, 42CrMo
Special Use: Wear Resistant Steel
Application: Tool Steel Bar
Heat Treatment: Annealing/Q+T
Technology: Hot Rolled/Forged/Clod Drawn
Thickness: 6-80mm
Width: 205~610mm
Length: 2000~4000mm
Certificate: ISO/Mill Certificate
Test: SGS/Ut100%/Elements Testing
Delivery Quantity: Include MOQ
Surface: Black/peeled
Delivery Time: 15-40 days
Trademark: CF STEEL
Transport Package: for Customers′ Request
Specification: diameter 12-300mm
Origin: Guangdong, China
HS Code: 7225401000
1.7225/SCM440/SAE4140 Alloy Steel Round Bar For Mechanical

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(%)
C Si Mn Cr Mo P S Ni
0.38~0.45 0.17~0.37 0.60~0.90 0.90~1.20 0.15-0.25 ≤0.018 ≤0.030 ≤0.012

1, 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.

2, 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;

3,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)

4,Ready Stock: 
Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.
5,Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered hardness:28-34 HRC.

6, 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.

7,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.

Company certificate
1.7225/SCM440/SAE4140 Alloy Steel Round Bar for Mechanical

Product show

1.7225/SCM440/SAE4140 Alloy Steel Round Bar for Mechanical

1.7225/SCM440/SAE4140 Alloy Steel Round Bar for Mechanical


The straight ladder provides easy access to mid-range heights, can be used for reaching windows, cleaning gutters or any medium height requirement.

The side rails are extra heavy duty I-beam rails and the aluminum round rungs are deeply serrated for slip resistance. The components are connected with the riveting process, which very is firm and safe.

Max load capacity is 100 kg; extension length can be 1.8m to 4.5m.

FRP LadderAluminum Straight LadderSingle Straight LadderStraight ladder use

Straight Ladders

Safety Step Ladder,Aluminium Step Ladders,Straight Ladders,Standard Ladder

SUZHOU RIZHONGTIAN ALUMINUM CO.,LTD. , http://www.alumi-china.com

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