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DIN 28Cr4/1.7030 QT Alloy Structrural Steel

Min Order: As Your Required
Type: Alloy Steel Bar
Standard: AISI, ASTM,  GB, DIN
Technology: Hot Rolled/Forged/Cold Drawn
Form: Round Bars/ Flat Bar / Blocks/ Tube
Surface: Black; Peeled; Polished; Machined; Grinded; Turned
Process: Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
Certificate: ISO/ Mill Certificate   
After-sales Service: 24 Hours Online
Warranty: Three Years
Origin: China
Sample Supply: Yes
Experience: 15 Years Manufacturer Experience
Payment Term: 30% Tt Deposit, Balance Against Bl Copy
Availability:
Quantity:
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  • 28Cr4

  • Qilu

Product Description

DIN 28Cr4/1.7030 QT Alloy Structrural Steel


1: 28Cr4 Steel Introduction

  28Cr4 is mainly composed of iron, chromium and small amounts of carbon, silicon, manganese and other elements. Chromium is the main alloying element, with a content of 28%, hence the name 28Cr4. Carbon content is lower, at 0.4%. In addition, the addition of silicon, manganese and other elements for the strengthening of steel and corrosion resistance also play a role. 28Cr4 has good mechanical properties, including high strength, high hardness, good wear resistance and corrosion resistance.

 144 124

28Cr4 Steel Stock In Warehouse


2: 28Cr4 Quality Standard

DIN17200 1987-ENG Steels-for-Quenching-and-Tempering.pdf


3: 28Cr4 Steel Equivalent

Country China Japan Germany USA
Standard GB/T JIS

DIN (W-Nr.)

DIN 17200

AISI/ASTM

Grade / / 28Cr4/1.7030 /


4: 28Cr4 Steel Chemical Composition

Grade C Si Mn P S Cr
28Cr4/1.7030 0.24-0.31 0.40 0.60-0.90 0.025 0.035 0.90-1.20


5: 28Cr4 Steel Mechanical Properties

   The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.


6: 28Cr4 Steel Overviews

Size Round Dia 6-1200mm
Plate/Flat/Block Thickness
6mm-500mm
Width
20mm-1000mm
Heat treatment Normalized ; Annealed ; Quenched ; Tempered
Surface condition Black; Peeled; Polished; Machined; Grinded; Turned; Milled
Delivery condition Forged; Hot rolled; Cold drawn
Test Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc.
Payment terms T/T;L/C;/Money gram/ Paypal
Trade terms FOB; CIF; C&F; etc..
Delivery time 30-45 days


7: 28Cr4 Steel Application

  Due to the excellent properties and comprehensive parametric data of 28Cr4, it is widely used in engineering practice. The steel is commonly used in the manufacture of machine parts, cutting tools, molds and some structural parts that require high strength and wear resistance. Meanwhile, 28Cr4 is also widely used in automobile manufacturing, engineering machinery and aerospace.


8: 28Cr4 Steel Heat Treatment

Thermal Processing Temperature/°C: 1050~850

Heat treatment temperature/°C| Annealing: 680~720

Heat Treatment Temperature/°C | Normalizing: 840~880

Heat Treatment Temperature/°C | Hardening: 830~860

Heat treatment temperature/°C | Tempering: 540~680

Hardness after annealing ≤ HBS: 223


9: 28Cr4 Steel Tolerance


Diameter(mm)

Tolerance

Forged Steel Round Bar

80-600

Black Surface:0~+5

Rough Machined or Turned:0~+3

650-1200

Black Surface:0~+15

Rough Machined or Turned:0~+3

Hot Rolled Steel Round Bar

16-310

Black Surface:0~+1

Peeled:H11

Cold Drawn Steel Round Bar

6-100

Black Surface:H11

Peeled:H11


10: Delivery Condition

For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.


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