Description
The alloy structural steels are provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.
The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.
Application
The alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
All Grades Comparison
DIN |
EN |
| 1.6932 |
28NiCrMoV8-5 |
Quality Standard
EN 10250 Open steel die forgings for general engineering purposes. Alloy special steels
Chemical Composition(%)
C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
V |
| 0.24-0.32 |
0.15-0.40 |
0.40 max |
0.035 max |
0.035 max |
1.00-1.50 |
1.80-2.10 |
0.35-0.55 |
0.05-0.15 |
Mechanical Properties(T=20°C if not differently stated) with Quenched and Tempered Delivery Condition
Diameter(mm) |
Tensile Strength Rm (Mpa) |
Yield Strength Rp0.2 (Mpa) |
Elongation A5 (%) |
Impact Value Kv (J) Room Temperature |
| 160 max |
800 min |
630 min |
14 min |
45 min |
| 160-330 |
750 min |
590 min |
15 min |
40 min |
| 330-660 |
750 min |
590 min |
15 min |
40 min |
HEAT TREATMENT:
· Hardening Temperature:830°C-870°C
· Tempering Temperature:550°C-850°C
Forging:
Hot forming temperature: 1050-850°C.
Mill's test certificate:
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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