Audited Supplier
A+ steel hollow bar
Metal
Forging
Pressure Casting
Machinery Parts
Steel
Annealing
Polishing
+/-0.1mm
ASTM
CE, ISO 9001:2000, ISO 9001:2008
1/2'' to 500''
Roungh Machining
AISI4340 Steel Hollow Bar Forging
1/2'' to 500''
aisi4140 steel hollow bar
Wooden Package and Steel Package
steel hollow bar
Jiangsu China
73269090
Product Description
Name: Forging aisi4140 aisi4340 steel bright hollow bar
We are the manufacturer specialized in machining heavy duty forging parts for nearly 18 years. Our products, such as drive shaft, Forging Hollow Shaft, Shaft Sleeve, Eccentric shaft, Forging rod, Large bolt, Heavy Duty Hydraulic Cylinder, are widely used in coiled material, petroleum, metallurgy, mine, machinery and transportation industry etc!
Product List
| Name | Technique | Material | Dia/mm | Wall thickness | Length/mm |
| Forging shaft | Forging+turning+grinding | Alloy steel Carbon steel Stainless steel | 200-800 | ---- | 500-10000 |
| Hollow shaft | Forging+drilling+turning | 150-800 | ≥15mm | ≤7000 | |
| Shaft sleeve | Forge+drill & bore+turning +milling | 400-700 | ≥15mm | ≤8000 | |
| Large bolt | Rolled/forge+turning+threading | 300-800 | ---- | ≤7000 | |
| Hydraulic cylinder | Forging+drill & bore+ turning | 300-2000 | ≥10mm | ≤10000 | |
| Other parts in deep-hole | Forge+ drill & bore+turning+mill | 300-2000 | ---- | ≤10000 |
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
