| Quantity: | |
|---|---|
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.
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.
