40Cr Alloy Seamless Steel pipe

40Cr steel Pipe is a kind of Chinese GB standard alloy steel for engineering and machinery purpose, and one of the most widely used steel grades. After quenching and tempering treatment, 40Cr steel pipe has good comprehensive mechanical properties, low temperature impact toughness, low notch sensitivity, good hardenability, and high fatigue strength in cold oil. When water cooling, the complicated shape of the parts is prone to cracks, the cold bending plasticity is medium, and the cutting workability after normalizing is good, but the weldability is poor, should be preheated before welding, and is generally used in the state of quenching and tempering.

Products Details

Chemical Composition(%)

Grade

C

Si

Mn

Cr

Mo

Ni

40Cr

0.37-0.44

0.17-0.37

0.40-0.70

0.70-1.00

/

/

Mechanical Properties

Grade

Tensile Strength(MPa)

Yield Strength(MPa)

% Elongation in 2 in.(50mm) min

40Cr

900 min

660 min

12

Quality Control

1. Incoming Raw Material Inspection 2. Raw Material Segregation to avoid steel grade mix-up 3. Heating and Hammering End for Cold Drawing 4. Cold Drawing or Cold Rolling, On line inspection 5. Heat Treatment 6. Straightening/Cutting to specified length/Finished Measuring Inspection 7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc. 8. Packing and Stocking. 100% Eddy Current Testing. 100% Size Tolerance Checking. 100% Tube surface checking to avoid surface defects

Delivery Condition

Hot Rolled, Annealed, Normalized, Quenched and Tempered Packaging 1. Bundle packing 2. Beveled end or plain end or varnished as per buyer's required 3. Marking: as per customer's requests 4. Painting varnish coating on the pipe 5. Plastic caps at ends Delivery time With 15-30 days after full payment received

Contact us

Please feel free to give your inquiry in the form below We will reply you in 24 hours