30CrNiMo8 1.6580 Forged Round Bar Alloy Steel Standard EN10250 EN10083 SEW550
30CrNiMo8 1.6580 forged round bar alloy steel 30CrNiMo8 steel Manufacturer
Alloyed structural steel with medium hardenability designed for heavy duty components, characterized by high elasticity and strength properties reaching over 1560 N/mm2 at small diameters. When softened, the hardness reaches max. 248 HRB. It is also characterized by its resistance to variable loads and impacts. The material is not suitable for welding and ultimately requires additional preheating. Grade 30CrNiMo8 is used for production of heavily loaded parts, shafts and drive axes, steering shafts, crankshafts of engines, screws and elements exposed to temperatures in the power industry.
Forged Round Bar 30CrNiMo8 1.6580 Product features
| Material | 30CrNiMo8 1.6580 |
| Type | Forged bar ,round ,square, flat, block, shaft etc. |
| Diameter | φ150-1500mm |
| Length | Max 10000mm (10m) |
| Surface | Black, peeled, polishing, bright, sand blast, hair line, etc. |
| Application | Heavy machinery axle,turbine shaft blade, high load of transmission parts, fasteners, crank shafts, gears, as well as heavily loaded parts for motor construction etc. |
| Tensile strength test | DIN EN ISO 6892-1 |
| Impact test | DIN EN ISO 148-1 |
| UT | DIN EN10228 Quality-Class 3 C/c or D/d |
| Grain size | ASTM E112 / EN ISO 643 |
| Applicable standard | EN10250,EN10083,SEW550 etc |
| Certificate | EN 10204 / 3.1 3.2 |
Forged Round Bar 30CrNiMo8 1.6580 Chemical Compostion
| Standard | Steel designation name | Number | C | Si | Mn | P | S | Cr | Mo | Ni |
| EN10250 | 30CrNiMo8 | 1.6580 | 0.26-0.34 | ≤0.40 | 0.30-0.60 | ≤0.035 | ≤0.035 | 1.80-2.20 | 0.30-0.50 | 1.80-2.20 |
Forged Round Bar 30CrNiMo8 1.6580 Mechanical properties
| Mechanical properties in the quenched and tempered condition (continued) Thickness of ruling section tR |
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| Steel designation |
tR≤160mm | 160＜tR≤330mm | 330＜tR≤660mm2) | |||||||||||||||||
| Standard | Name | Number | Remin N/mm² |
Rmmin N/mm² |
A min % |
KV min J |
Remin N/mm² |
Rmmin N/mm² |
A min % |
KV min J |
Remin N/mm² |
Rmmin N/mm² |
A min % |
KV min J |
||||||
| 1 1) | tr 1) | 1 1) | tr 1) | 1 1) | tr 1) | 1 1) | tr 1) | 1 1) | tr 1) | 1 1) | tr 1) | |||||||||
| EN10250 | 30CrNiMo8 | 1.658 | 700 | 900 | 12 | 8 | 45 | 22 | 630 | 850 | 12 | 8 | 45 | 22 | 590 | 800 | 12 | 8 | 40 | 20 |
Forged Round Bar 30CrNiMo8 1.6580 Comparison of steel grades
| EN | Number | ISO 683-1:1987 | Germany | United Kingdom | France | Italy | Sweden | Spain |
| 30CrNiMo8 | 1.658 | (31CrNiMo8) | (30CrNiMo8) | (823M30) | 30 CND 8 | - | 2541 | - |
Forged Round Bar 30CrNiMo8 1.6580 Heat treatment
- Normalizing: 850 – 880°C,Cooling in air
- Soft Annealing:680 – 720°C,Cooling in furnace
- Stress relieve:450-650°C,Cooling in air
- Hardening:820 – 880°C,oil or water quench
- Quenching: 820– 860°C
- Tempering:540 – 680°C,Cooling in air
About Guangda For forged round bar
- Directly manufactuer -- One stop for quality forged round bars
- Sold more than 100k tons for the round bars per year for overseas market.
- Register the exclusive trademark of GD in Europe.
- Experience for more than 10 years with quick delivery time and fast service.
- Listed company. Strong scientific research ability , Strength for Market experience and customer service .
- Certificate PED,DNV, BV, Rina, ISO, GL, ABS, LR etc.
30CrNiMo8 round bar
30CrNiMo8 steel
Alloy steel bar
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