AISI 4340 / SAE 4340 34CrNiMo6 Forged QT Steel Round Square Bars
4340Forged round bars
Forged Steel Square Bars, Forged rings and other forged bars
1.Size of our forged steel bars:
Round bar
Size: Dia.80-1,000mm
Length: 3,000-10,000mm
Square bar
Size: 150×150-600×600mm
Length: 1,000-8,000mm
2.Ultrasonic Test: GB/T6402-91 CLASS 3 or SEP 1921 C/C ,D/d.
3.Manufacture:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
4.Packing details: Nude packing, sea-worthy packing.
5.Payment terms: T/T, L/C
6.4340 steel chemical composition:
| tandard |
Grade |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
| ASTM A29 |
4340 |
0.38-0.43 |
0.60-0.80 |
0.035 |
0.04 |
0.15-0.35 |
1.65-2.00 |
0.70-0.90 |
0.20-0.30 |
| EN 10250 |
36CrNiMo4/ |
0.32-0.40 |
0.50-0.80 |
0.035 |
0.035 |
<=0.40 |
0.90-1.20 |
0.90-1.2 |
0.15-0.30 |
| 1.6511 |
| BS 970 |
EN24/817M40 |
0.36-0.44 |
0.45-0.70 |
0.035 |
0.04 |
0.1-0.40 |
1.3-1.7 |
1.00-1.40 |
0.20-0.35 |
| JIS G4103 |
SNCM 439/SNCM8 |
0.36-0.43 |
0.60-0.90 |
0.03 |
0.03 |
0.15-0.35 |
1.60-2.00 |
0.60-1.00 |
0.15-0.3 |
7.4340 Forged Steel Application:
- Aircraft Landing Gear
- Automotive,
- Oil and Gas Drilling,
- Forging,
- Warm and Cold Forming,
- Machine Building,
- Transfer Systems, like power transmission gears and shafts.
- General engineering industries and structural use applications, such as: heavy duty shafts, gears, axles, spindles, couplings, pins, chucks, molds etc.
8.4340 Forged Steel Delivery condition:
Forged
Forged+Normalized+Rought machined
Forged+Annealed
Forged +Q&T
9.About our forging mill:
Our main products include Forged Steel Round Bar from Sizes 85mm to 1200mm, Forged Steel Square Bar from Sizes 150X150 to 800X800mm with various grade ;The largest production steel ingot 15T, mainly forged alloy steel, carbon steel and other materials. The annual output of forged round can reach 60,000 tons. The products are widely used and can be supplied to users in metallurgy, chemical, hydraulic, port and marine machinery .
The main equipment includes a 2000-ton hydraulic press, a 3-ton electro-hydraulic hammer, a 2.5-meter ring rolling machine, and is equipped with large and small traveling machines, metalworking lathes, and multiple large and small sawing machines. The company now has more than 100 sets of production equipment from a whole set of processes from blanking, heating, forging to heat treatment and machining.
Audited Supplier 
){kind=link}