We are professional AISI 4820(18CrNiMo7-6,17CrNiMo6,1.6587) Forged Forging Forge Alloy Steel DTH Hammer Drilling Drill Bits Body Bodies Heads Shank from china
The following table shows the chemical composition of AISI 4820 alloy steel.
ElementContent (%)
| Iron, Fe | 94.645-95.72 |
| Nickel, Ni | 3.25-3.75 |
| Manganese, Mn | 0.500-0.700 |
| Molybdenum, Mo | 0.200-0.300 |
| Carbon, C | 0.180-0.230 |
| Silicon, Si | 0.150-0.300 |
| Sulfur, S | ≤ 0.0400 |
| Phosphorous, P | ≤ 0.0350 |
Physical Properties
The physical properties of AISI 4820 alloy steel are outlined in the following table.
PropertiesMetricImperial
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
Mechanical Properties
The mechanical properties of annealed AISI 4820 alloy steel are given in the table below.
PropertiesMetricImperial
| Tensile strength | 685 MPa | 99400 psi |
| Yield strength | 460 MPa | 66700 psi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
Product Flow
1.Inquiry with drawings in details.
2.Confirm steel material, chemical compositions, mechanical properties, tolerance.
3.Confirm payment terms,order materials or check material in stock.
4.Check material chemical compositions, material weight, dimensions.
5.Cut materials record weight, making mould for casting of pr-hearting for forging.
6.Forging ratios, heat treatment ,dimension check.
7.Rough machining, UT test,heat treatment.
8.Semi-finish, quenching,
8.Fine machining, UT test, dimension inspection, mechanical properties test.
9.Customer inspection, packing, delivery arrangement.
Steel ingot making
EAF+LF+VD/VAD or ESR
Manufacturing process
EAF + LF + VD+ Forging+ Normalizing & Tempering + Rough machining + UT test + Quenching & Tempering + Precision machining
Report
Chemical composition report, Physical properties report, Heat treatment report, Dimensional inspection report, NDT report
Nondestructive test (NDT)
UT ( ultrasonic testing ), MT ( magnetic particle testing ), PT ( penetrant testing)
Quality certification : ISO 9001: 2008, IQNET
Forged ratio: | no less than 4:1
|
Technical Data: | According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing |
Test: | Ultrasonic test according to SEP 1921-84 G3 C/c
|
Certificate of Quality | in addition the normal terms, production process, the mechanical property forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality
|
Marking: | Grade, heat NO. length will be stamped one each bar with required color
|
Payment: | 30% advance by TT; Balance pay before the shipment against shipping documents or irrevocable LC at sight
|
Certification:
ISO 9001:2008, PED Certificate,API, TUVRheinland, Bureau Veritas (BV), Lloyd Register (LR), ABS, RINA, Germanischer Lloyd (GL), Korean Register of Shipping (KR), Det Norske Veritas (DNV), Nippon Kaiji Kyokai (NK);
Forging & Heat Trea
Name&Description | Capacity | Quantity |
3600Thydraulic press | Max. single forging in 18T | 1 |
2000T hydraulic press | Max. single forging in 9T | 2 |
800 hydraulic press | Max. single forging in 5T | 1 |
6T electrical hydraulic hammer | Max.single forging in 5T | 1 |
3T electrical hydraulic hammer | Max.single forging in3T | 1 |
Air hammer | Max.single forging from250kg to 1000kg | 7 |
Forging operation machine | Max.singe forging from20T-5T | 7 |
Heat treatment Furance | Max.8000*5000*1500mm | 11 |
CNC driling machine | Max.5000mm | 2 |
Vertical lathe | From 1600 to 5000mm | 60 |
Horizontal lathe | Max.5000mm | 70 |
Band sawing machine | 260-1300mm | 36 |
