F11/F12/F22 Alloy steel Manufacturer and Exporter,supplied with round,square,flat,block,and shaft etc.
F11/F12/F22 Alloy steel are heat-resistant steels,and belongs to the ASTM A182 standard.At high temperatures, they have high temperature mechanical properties,high temperature oxidation resistance, good toughness and process performance, and have a certain resistance to hydrogen corrosion.
They are mainly used in pressure systems,included are flanges,fittings,valves and similar parts,and widely used in the manufacture of petrochemical, coal conversion, nuclear power, steam turbine cylinders, thermal power and other large-scale equipment with harsh operating conditions and complex corrosive media.
F11/F12/F22 STEEL SUPPLY FORM & SIZE & TOLERANCE
Hot Forged Round bar:Φ80-Φ1000mm
Hot Rolled Round bar:Φ16-Φ130mm
Hot Forged Square bar: Max Thickness:500mm
Flat bar/Blcoks:Thickness :120-800mm ,Width:120-1500mm
| Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0，+5mm) | (0，+1mm) | (0，+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
F11 STEEL CHEMICAL COMPOSITION
| Level | Grade | C | Si | Mn | P | S | Cr | Mo |
| Class 1 | F11 | 0.05-0.15 | 0.5-1.0 | 0.3-0.6 | ≤0.03 | ≤0.03 | 1.0-1.5 | 0.44-0.65 |
| Class 2 | F11 | 0.1-0.2 | 0.5-1.0 | 0.3-0.8 | ≤0.04 | ≤0.04 | 1.0-1.5 | 0.44-0.65 |
| Class 3 | F11 | 0.1-0.2 | 0.5-1.0 | 0.3-0.8 | ≤0.04 | ≤0.04 | 1.0-1.5 | 0.44-0.65 |
F11 Forged round steel
F12 STEEL CHEMICAL COMPOSITION
| Level | Grade | C | Si | Mn | P | S | Cr | Mo |
| Class 1 | F12 | 0.05-0.15 | ≤0.5 | 0.3-0.6 | ≤0.045 | ≤0.045 | 0.8-1.25 | 0.44-0.65 |
| Class 2 | F12 | 0.1-0.2 | 0.1-0.6 | 0.3-0.8 | ≤0.04 | ≤0.04 | 0.8-1.25 | 0.44-0.65 |
F22 STEEL CHEMICAL COMPOSITION
| Level | Grade | C | Si | Mn | P | S | Cr | Mo |
| Class 1 | F22 | 0.05-0.15 | ≤0.5 | 0.3-0.6 | ≤0.04 | ≤0.04 | 2.0-2.5 | 0.87-1.13 |
| Class 3 | F22 | 0.05-0.15 | ≤0.5 | 0.3-0.6 | ≤0.04 | ≤0.04 | 2.0-2.5 | 0.87-1.13 |
F11 STEEL EQUIVALENT GRADE
Germany/DIN:13CrMo44/1.7335
China/GB:15CrMoA
F22 STEEL EQUIVALENT GRADE
Germany/DIN:10CrMo9-10/1.7380
F11/F12 STEEL FORGING
- Initial Forging Temperature：1200℃
- Final Forging Temperature：800℃
- Forging Ratio：above 4:1
- Cooling Method After Forged:F11 and F12 Steel should be cooled as slowly as possible in sand after forged.
F12 Forged round steel
F22 STEEL FORGING
For F22 steel, due to relatively high Cr-Mo elements,recommended forging temperature should be 850℃- 1100℃.As a steel grade with high white spot sensitivity, F22 steel should be put into the furnace for hydrogen elimination heat treatment in time after forging.
F11/F12/F22 STEEL HEAT TREATMENT
| Grade | Heat Treat Type | Austenitizing Temperature,℃ | Cooling Media | Tempering Temperature,℃ |
F11 | Annealing | ≥900 | Furnace Cooling | / |
| Normalizing & Tempering | ≥900 | Air Cooling | ≥620 | |
F12 | Annealing | ≥900 | Furnace Cooling | / |
| Normalizing & Tempering | ≥900 | Air Cooling | ≥620 | |
F22 | Annealing | ≥900 | Furnace Cooling | / |
| Normalizing & Tempering | ≥900 | Air Cooling | ≥675 |
F11/F12/F22 STEEL MECHANICAL PROPERTY
| Grade | Level | Tensile Strength,Mpa | Yield Strength,Mpa | Elongation,% | Reduction of Area,% | Hardness,HBW |
F11 | Class 1 | ≥415 | ≥205 | ≥20 | ≥45 | 121-174 |
| Class 2 | ≥485 | ≥275 | ≥20 | ≥30 | 143-207 | |
| Class 3 | ≥515 | ≥310 | ≥20 | ≥30 | 156-207 | |
F12 | Class 1 | ≥415 | ≥220 | ≥20 | ≥45 | 121-174 |
| Class 2 | ≥485 | ≥275 | ≥20 | ≥30 | 143-207 | |
F22 | Class 1 | ≥415 | ≥205 | ≥20 | ≥35 | ≤170 |
| Class 3 | ≥515 | ≥310 | ≥20 | ≥30 | 156-207 |
F22 Forged round steel
