Basic Info.
Model NO.
4140
Ts (MPa)
>1080
Elongation Stress (MPa)
930
Elongation
45
Eduction of Area
63
Melting Point
1150
Certificate
SGS ISO
Delivery Time
Within 15working Days
Transport Package
Woven Bag, Wooden Box
Specification
from 5mm--100mm
Trademark
Taixie
Origin
Wuxi, Jiangsu
HS Code
72222000
Production Capacity
500t/Mon
Product Description
Chemical Component%
| C | Si | Cr | Mn | Cu | S | P | Ni | Mo |
| 0.38~0.45 | 0.17~0.37 | 0.90~1.2 | 0.5~0.8 | ≤0.3 | ≤0.035 | ≤0.035 | ≤0.3 | 0.15~0.25 |
Design features
⇒ Good resistance to uniform corrosion
⇒ Good resistance to pitting and crevice corrosion
⇒ Very good resistance to stress corrosion cracking
⇒ Good resistance to intercrystalline corrosion
⇒ Good formability and weldability
Corrosion resistance
Uniform corrosion Uniform corrosion is characterized by a uniform corrosion of the steel surface in contact with the corrosive medium. Resistance is normally considered good if the corrosion rate is less than 0.1 mm/year. As a result of its high chromium, nickel and molybdenum contents and its alloying with copper, EN 1.7225 is passivated even in reducing environments such as dilute sulphuric acid and formic acid. Its high nickel content contributes towards its relatively low corrosion rate in the active state.
Intercrystalline corrosion
EN 1.7225 has a very low carbon content. This means that there is very little risk of carbide precipitation in connection with ordinary heat treatment and welding. The risk of intercrystalline corrosion after ordinary heat treatment and welding is thereby eliminated.
