Chemical Composition(%)
| Grade | C | Si | Mn | Cr | Mo | Ni |
| 20Cr | 0.18-0.24 | 0.17-0.37 | 0.50-0.80 | 0.70-1.00 | / | / |
Mechanical Properties
| Grade | Tensile Strength(MPa) | Yield Strength(MPa) | % Elongation in 2 in.(50mm) min |
| 20Cr | 785-835 | 490-540 | 10 |
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 defectsDelivery 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 received20Cr alloy steel pipe can improve the material utilization rate, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sleeves, etc. 20Cr alloy steel pipe is also an indispensable material for various conventional weapons, and the barrel and barrel of the gun are made of steel pipe.