Low-Alloy Plate

material

Production process

For drawing the size of the low alloy steel die is less than before drawing the diameter size of the capillary (pull out), and so, in order
to make the front end of the capillary can be smoothly through the drawing die, so that the drawing the car card head jaw can grip the capillary head, before drawing need to be head of capillary pinching (grinding fine wool
tube end make it smaller than the size of die hole diameter size) for this purpose, the capillary should be seam in heating furnace in a certain length of pipe end, generally is 150 ~ 200 mm, according to the wall thickness
of different heating temperature is between 750 ~ 900 ℃.Then with 75~300 kg air hammer, grind the head of the fine capillary tube, usually the diameter of the capillary tube below 22mm can be used rotary forging hammer
or roll forging machine grinding point.

In order to remove defects and improve plasticity, low-alloy steel plate should be processed by heat treatment and pickling before drawing,
and then washed and dried to remove residual acid after pickling.Mechanical methods such as shot peening and sand blasting can also be used to remove
the iron oxide instead of pickling.

In order to reduce the friction between the low-alloy steel plate and tool surface during tube drawing, in order to reduce tool wear, extend
its service life and reduce energy consumption, thus ensuring the quality of 15CRMO low-alloy steel plate, lubricants should be applied to the capillary tube before cold drawing.

Description

Alloy plate belongs to ultra-high strength steel, with high strength and toughness,
better hardenability, no obvious temper brittleness, after quenching and tempering treatment, higher fatigue limit and resistance to multiple impact ability, low temperature impact toughness is good.

The steel is suitable for manufacturing large and medium-sized plastic moulds
with certain strength and toughness.

Corresponding to Shoute Steel: 42CRMO, corresponding to Germany: 42CRMO4, corresponding
to the United States: 4140, corresponding to Japan SCM440.

The alloy plate is heated to the temperature above 30 ~ 50℃ where all ferrite
is converted into austenite. The alloy plate is held for a period of time and then cooled slowly with the furnace. During the cooling process, the austenite changes again, which can make the steel microstructure become fine.

The workpiece is heated to the temperature of 20 ~ 40℃ above which the alloy
plate begins to form austenite. After the heat preservation, it is cooled slowly. During the cooling process, the laminar cementite in the pearlite becomes spherical, thus reducing the hardness.

Elongation of alloy plate

The alloy plate plays an important role in all kinds of operation. The alloy
content in the alloy plate is relatively low.

Alloy plate in a variety of operations and applications is to do a more detailed
overview of its elongation, about its elongation is accompanied by its length, performance, hardness and a variety of indicators for comprehensive evaluation.

Elongation refers to the percentage of the initial length of the section of the
metal after the fracture of the pattern during tensile tests.

Let's use the symbol delta.

Elongation reflects the plastic size of the material, the greater the elongation,
the greater the plasticity.

Metal materials subjected to external forces (tensile), the breakage of the test
bar length and the length of elongation percentage, elongation in accordance with the test bar length is divided into: short for the elongation test bar, known as the delta 5, test bar scale distance equal to five times
the diameter, long for the elongation test bar, 10, known as the delta test bar scale distance equal to 10 times the diameter of its or his successful bid is used to determine the specimen strain or length change of part
of the original length.

The elongation of alloy plate and ordinary metal is not so long, so it is recommended that manufacturers in the operation of the time to be
able to do!

FAQ

Q1:Can I have a sample? Is it freee?

A:Yes,sample is pffered for free, but the freight shall be charged by customer.

Q2:What about the lead time?

A:Normally 7-101 days for normal specification,2-5 days if we have in stock.

Q3:Do you ahve MOQ limit?

A:It depends on products, normally we can do client requires.

Q4:What about your payment term?

A: T/T or L/C,Western Union, it can be negotiated.

Q5:What certificate has your company got?

CE certificate,ISO9001,SGS certificate,MTC certificate,shipping inspection or any third party as you need.

Q6: Do you have the Corten A Steel in stock?

A: We have Corten A Steel in stock ,also can produce according to your order.

Packaging & Delivery

Packing:

Export standard packing

Port: Tianjin,Shanghai,Guangzhou,Qingdao,etc

Lead time:

certificate

ASTM A276, A484, A479, A580, A582, JIS G4303, JIS G4311,DIN 1654-5,

DIN 17440,GB/T 1220