Product Description

Introduction:

***4PH alloy is a precipitation of copper, niobium / columbium constituted hardening martensitic stainless steel. This level has high strength, degree (up to **0º C / **2º F) and anti-corrosion properties. After heat treatment, the mechanical properties of the product more perfect, can reach up to ********0 mpa (******0 ksi) of compressive strength. This level can not be used above **0º C (**2º F) or under very low temperatures, its atmosphere and dilute acid or salt has good corrosion resistance, corrosion resistance and its **4 and **0 the same.

Applications:

• offshore platforms, helicopter deck, other platforms

• Food Industry

• Pulp and paper industry

• Aerospace (turbine blades)

• Mechanical parts

• Nuclear waste barrel

standard:

ASTM .............. A**3 grade **0 (AMS ***4B) UNS S****0

EURONORM ..1.***2 X5CrNiCuNb ***4

AFNOR ........... Z5 CNU ***4PH

DIN .................. 1.***2

GB....................0Cr*7Ni4Cu4NbProcessing

Hot forming

Hot forming should be treated in a certain temperature range, such as *******0ºC (********2ºF).

The whole heat treatment includes solid annealing, cooling( lower than *5ºC) and curing.

Cutting

1. Thermal cutting (plasma, sawing, etc.)

Considering the thermal metamorphism, the cutting process should be appropriate. After cutting, it needs to be grinded in order to remove the oxide layer.

2. Mechanical cutting: shear, punching, cold saw, etc.

Machining:

Thermoforming

Hot forming should be carried out within a temperature range *******0ºC (********2ºF). Complete heat treatment including solution annealing, cooling (less than *5ºC) and aging (at a given temperature).

Processing

Hot forming

Hot forming should be treated in a certain temperature range, such as *******0ºC (********2ºF).

The whole heat treatment includes solid annealing, cooling( lower than *5ºC) and curing.

Cutting

1. Thermal cutting (plasma, sawing, etc.)

Considering the thermal metamorphism, the cutting process should be appropriate. After cutting, it needs to be grinded in order to remove the oxide layer.

2. Mechanical cutting: shear, punching, cold saw, etc.

welding:

***4 PH alloy can be welded the following:. SMAW, GTAW, PAW and GMAW preliminary test (to check for cracks and weld metal toughness), the SAW welding can be carried out. Because ferrite solidification, reduces the likelihood of weld metal hot cracking and thermal deterioration. In general, does not require preheating, intermediate temperature should be controlled at **0 ° C (**8 ° F). After full heat treatment (solution annealing + hardened), the toughness will increase. Martensitic structure due to its own characteristics, the weld metal oxygen content is low to keep the good toughness and ductility. In order to avoid cold cracking, hydrogen intervention should be avoided. ***4 PH alloy can be filled with the same type of metal (e.g., E **0 (AWS A5.4)? ER **0 (AWS A5.9) welding. If welding without taking into account the mechanical properties of ***4PH to be austenitic filler metal, then there is no need for heat treatment.

Processing technology

Cold drawn polishing, strip polishing,turning, etc.

ISO Dimensional tolerance standard