We are professional AISI 4340(34CrNiMo6,1.6582,SAE 4340)
Forged Forging Steel Casing Hangers/Tubing Hangers factory
from china
Analysis | Carbon | 0.38-0.43% | Chromium | 0.70-0.90% | Manganese | 0.60-0.80% | Molybdenum | 0.20-0.30% | Silicon | 0.15-0.35% | Nickel | 1.65-2.00% | Phosphorous | 0.025% max | Sulphur | 0.025% max |
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Applications
This grade of steel is suited for shock loading or stress
concentration applications such as shafts, gears, bolts, nuts, pins
and couplings.
Forging
Preheat the steel carefully, then raise the temperature to
1150-1210°C for forging. Do not forge below 850°C. 4340 has good
forging characteristics but care must be taken when cooling as the
steel shows susceptibility to cracking. Cooling in ash or lime
after forging is recommended.
Annealing
Heat the steel slowly to 800-860°C and allow enough time for the
steel to be thoroughly heated. Cool slowly in the furnace.
Stress Relieving
When components are heavily machined, ground or otherwise subject
to cold work, stress relieving will be beneficial prior to
hardening.
Hardening
4340 steel is usually supplied ready heat treated. If further heat
treatment is required annealed 4340 should be heated slowly to
830-865°C and after adequate soaking at this temperature quench in
oil. Temper as soon as the steel reaches room temperature.
Tempering
Heat the steel carefully to a suitable temperature selected by
reference to a tempering chart or table, soak at the temperature
for 2 hours per 25mm of section, then allow to cool in air.
Heat Treatment
Heat treatment temperatures, such as rate of heating, cooling and
soaking times can vary due to factors such as the shape and size of
each steel component. Other considerations during the heat
treatment of 4340 include the type of furnace, quenching medium and
work piece transfer facilities. Please consult a heat treatment
specialist for full guidance on heat treatment.
Forging & Heat Treatment Equipment ListName & Description | Forging Handling Capacities | Quantity |
3150 Tons Free Forging Hydraulic Press | Max. Single Forging in 28 Tons | 1 |
5000mm Diameter Rolling Forging Machine | Max. Single Forging in 16 Tons | 1 |
8 Tons Free Forging Hummer | Max. Single Forging in 7.5 Tons | 1 |
6 Tons Free Forging Hummer | Max. Single Forging in 5.5 Tons | 1 |
5 Tons Free Forging Hummer | Max. Single Forging in 4.5 Tons | 1 |
60 Tons Forging Handling Operator | Max. Single Forging in 45 Tons | 1 |
10 Tons Forging Handling Operator | Max. Single Forging in 7.5 Tons | 1 |
80 Tons Crane | Max. Single Ingot in 80 Tons | 1 |
60/30 Tons Crane | Max. Single Ingot in 60 Tons | 1 |
30/10 Tons Crane | 30/10 Tons | 4 |
Trolley Heat Furnace | 5000*1500*1200 mm | 3 |
Trolley Heat Furnace | 8000*2000*1600 mm | 3 |
Trolley Heat Furnace | 6500*1500*1200 mm | 3 |
Vertical Heat Furnace | Ø2500*10000 mm | 2 |
Total Forging Equipment Quantity | 24 |