AISI 4340 alloy steel bar

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US $700-1,000 / Metric Tons | 3 Metric Ton/Metric Tons (Min. Order)
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Overview
Quick Details
Steel Grade:
AISI 4340
Standard:
AISI, ASTM, BS, DIN, GB, JIS
Dimensions:
Dia: 10~350mm
Place of Origin:
Shanghai, China (Mainland)
Brand Name:
Unite Steel
Model Number:
Round bar
Technique:
Hot Rolled
Application:
Structural Steel Bar
Alloy Or Not:
Is Alloy
Special Use:
Free Cutting Steel
Type:
Alloy Steel Bar
Hardening:
850℃ oil
Tempering:
600℃ oil or water
Ultrasonic test:
According to SEP 1921-84 3C/c
Delivery condition:
Annealed/hot rolled/cold drawn/quenched & tempered
Surface treatment:
Machined/peeled/polished/turned
Certificate:
ISO 9001:2008/SGS/BV
Process:
EF+LF+VD+ESR+EAF
Supply Ability
Supply Ability:
3000 Metric Ton/Metric Tons per Month
Packaging & Delivery
Packaging Details
Seaworthy Package or as your request
Port
China main port
Lead Time :
Within 15-45 days

 

AISI 4340/DIN 1.6511/GB 40CrNiMo

Product Description

 

 

1.Chemical composition :

Carbon

0.38 - 0.43

Chromium

0.7 - 0.9

Iron

Balance

Manganese

0.6 - 0.8

Molybdenum

0.2 - 0.3

Nickel

1.65 - 2

Phosphorus

0.035 max

Silicon

0.15 - 0.3

Sulphur

0.04 max

 

2. Process:  EAF+LF+VD ( necessary) UT+ Rolled+Heat Treatment (optional)

 

3.Dlivery condition: hot rolled, annealing ton ≤ HB269

 

4.Surface conditions : scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

 

5. Mechanical Properites :

tensile strength σb (MPa)

min 980(100)

elongation δ5 (%)

min 12

reduction of areaψ (%)

min 55

impact absorbed energy Akv (J)

min 78

notched bar impact strength αkv(J/cm2)

min98(10)

yield point σs (MPa)

min835(85)

 

6. Applications: Used for manufacture big sized important Quenched-and-Tempered parts which request good toughness and high strength.such as top load shaft in heavy-duty machinery;

For steam turbine shaft, vane, and heavy-load transmission parts, fastening piece, crankshaft, gears etc. with diameter is biger than 250mm

 

7.Physical Data

Density (lb / cu. in.)

0.28

Specific Gravity

7.8

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.116

Melting Point (Deg F)

2600

Thermal Conductivity

21

Mean Coeff Thermal Expansion

6.6

Modulus of Elasticity Tension

33

 

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