630 (1.4542) PH 17-4 STAINLESS STEEL

630 (1.4542) PH 17-4 STAINLESS STEEL

630 (1.4542) PH 17-4 STAINLESS STEEL 630 (1.4542) stainless steel is a quality of stainless steel which is used in our country and in the world more and more with aging, or in other words it is a mixture of chrome and nickel containing austenitic and martensitic stainless steel which is included...
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630 (1.4542) PH 17-4 STAINLESS STEEL

630 (1.4542) stainless steel is a quality of stainless steel which is used in our country and in the world more and more with aging, or in other words it is a mixture of chrome and nickel containing austenitic and martensitic stainless steel which is included in the cured hardened stainless steel group.


630 grade stainless steel and other grade stainless steels can provide various benefits according to other grades. One of the most important of these is that stainless steels which are included in this group show corrosion resistance to both austenitic stainless steels and they have the property of gaining highly resistance through heat treatment such as martensitic stainless. The most commonly used quality in this stainless group is 17-4 PH (17% chromium and 4% nickel contained in its name).


630 - PH 17.4 Quality Stainless Steel Bill of Materials (1.4542)

Material Type

Min Diameter (mm)

Max Diameter (mm)

Stainless Steel Rod

6

254

Material Type

Min Edge (mm)

Max Edge (mm)

Stainless Steel Llama

Min thickness: 25mm, max thickness: 100mm

Min width: 50mm, max width: 200mm

Stainless Steel Square

Min measure: 30x30mm

Max measure: 60x60mm


Usage Areas

630 quality stainless steel, high mechanical strength, high hardness and has a good price-performance ratio, the world is a rapidly growing steel type. 630 grade stainless is frequently used in pump and valve shafts, kitchen appliances, petrochemical industry, chemical plants and stainless steel decoration materials.


1.4542, namely PH 17-4, is one of the areas where this stainless quality is used most frequently in the defense industry. This stainless steel material, which is preferred in defense industry in our country, is used frequently because of its high mechanical values and long life.


Chemical Composition

Quality

C

Mn

Si

PA

S

Cr

NU

630 (1.4542)

0.07max%

1.0%

0.7%

0.4%

0.03max%

15-17%

3-5%


Mechanical Properties at Room Temperature


Quality

630 (1.4542) X5CrNiCuNb16-4

Tensile strength

~ 1090 MPa

Yield strength, (0.2%)

~ 950 MPa

Hardness, Rockwell (HB)

360 max


Heat Treatment

Solution treatment (Condition A) — Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections of these grades can be oil quenched.


Hardening — Grade 630 stainless steels are age-hardened at low temperatures to achieve the required mechanical properties. During the process, superficial discoloration occurs followed by shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.


Typical mechanical properties of grade 630 steels achieved after solution treating

Cond.

Hardening

Typical Hardness Rockwell C

Tensile Strength (MPa)

Temp (°C)

Time (h)

A

Ann

-

36

1100

H900

482

1

44

-

H925

496

4

42

1170-1320

H1025

552

4

38

1070-1220

H1075

580

4

36

1000-1150

H1100

593

4

35

970-1120

H1150

621

4

33

930-1080


Welding

Grade 630 stainless steels can be welded using all conventional methods, and they do not require pre-heating. Care should be taken in designing and welding of high strength steels to prevent weldment stresses.


Machining

Grade 630 stainless steels can be machined in their solution-treated condition. They have machining rates similar to that of grade 304 steels.


Applications

Some of the major applications of grade 630 stainless steels include:

  • Engine components

  • High strength and boat propeller shafts

  • Plastic moulding dies

  • Valves and gears


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