GB/T 699 Grade 30 Steel
GB / T 699 Grade 30 Steel is a high-quality carbon structural steel
Standard: GB / T 699
Grade: Grade 30 Steel
GB / T 699 Grade 30 Steel Features:
Compared with low carbon steel, it has higher strength and hardness, better toughness and weldability. Most of this steel is used in normalized state, and it can also be quenched and tempered.
Application of GB / T 699 Grade 30 Steel
GB / T 699 Grade 30 Steel is suitable for hot forging, hot pressing and cutting additive methods, manufacturing parts with small cross-sections and low stress, working temperature ≤150 ℃, such as screw rods, tie rods, shaft keys, rings, gear , Sleeve, etc.
GB / T 699 Grade 30 Steel has good cutting performance and is widely used in bolts and screws processed on automatic machine tools. It is also suitable for manufacturing parts that require cold forging and welded parts. It can also be used for carburizing and carbonitriding Components.
Chemical composition of GB / T 699 Grade 30 Steel
Note: The content of steel and copper for hot-press processing should not be greater than 0.20%;
GB / T 699 Grade 30 Steel Mechanical Properties
The sample is a round steel with a diameter of 25mm
GB / T 699 Grade 30 Steel Welding performance
Grade 30 Steel and Grade 45 Steel are the only medium hardness steel electrodes with good bonding properties. They are suitable for air-cooled steel and cast steel: such as ICD5, 7CrSiMnMoV ... Automotive sheet metal cover molds and large metal sheet metal stamping dies can be used for repairing the drawing and stretching parts, and can also be used for hard surface production.
In addition, there are some things to note when using:
1. Dry the electrode at 150-200 ° C for 30-50 minutes before construction on a wet site.
2. Usually preheating above 200 ° C, air cooling after welding, it is best to perform stress relief if possible.
3. Multi-layer surfacing is required, and CMC-E30N is used as the base to obtain better welding results.
Hardness HRC 48-52
Main ingredients Cr Si Mn C
Applicable current range: diameter and length m / m 3.2 * 350mm 4.0 * 350mm
Current range (Amp) 70-100 130-150
GB / T 699 Grade 30 Steel Equivalent Grade
The name of GB is 30 steel, the name of DIN standard is C30, the name of ASTM standard is 1030, and the name of JIS standard is S30C.
Standard: GB / T 699
Grade: Grade 30 Steel
GB / T 699 Grade 30 Steel Features:
Compared with low carbon steel, it has higher strength and hardness, better toughness and weldability. Most of this steel is used in normalized state, and it can also be quenched and tempered.
Application of GB / T 699 Grade 30 Steel
GB / T 699 Grade 30 Steel is suitable for hot forging, hot pressing and cutting additive methods, manufacturing parts with small cross-sections and low stress, working temperature ≤150 ℃, such as screw rods, tie rods, shaft keys, rings, gear , Sleeve, etc.
GB / T 699 Grade 30 Steel has good cutting performance and is widely used in bolts and screws processed on automatic machine tools. It is also suitable for manufacturing parts that require cold forging and welded parts. It can also be used for carburizing and carbonitriding Components.
Chemical composition of GB / T 699 Grade 30 Steel
| Standard | Grade | Chemical composition(%) | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | ||
| GB / T699 | 30 Steel | 0.27~0.34 | 0.17~0.37 | 0.50~0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 |
Note: The content of steel and copper for hot-press processing should not be greater than 0.20%;
GB / T 699 Grade 30 Steel Mechanical Properties
| Grade | Heat treatment | Mechanical properties | Hardness HBW | |||||||
| Normalizing | Quenched | Tempering | Tensile strength (MPa) | Yield strength (MPa) | Elongation % | Shrinkage % | Impact absorption energy KU 2 J | Unheated steel | Annealed steel | |
| Heating temperature / ℃ | ≥ | ≤ | ||||||||
| 30 Steel | 880 | 860 | 600 | 490 | 295 | 21 | 50 | 63 | 179 | -- |
The sample is a round steel with a diameter of 25mm
GB / T 699 Grade 30 Steel Welding performance
Grade 30 Steel and Grade 45 Steel are the only medium hardness steel electrodes with good bonding properties. They are suitable for air-cooled steel and cast steel: such as ICD5, 7CrSiMnMoV ... Automotive sheet metal cover molds and large metal sheet metal stamping dies can be used for repairing the drawing and stretching parts, and can also be used for hard surface production.
In addition, there are some things to note when using:
1. Dry the electrode at 150-200 ° C for 30-50 minutes before construction on a wet site.
2. Usually preheating above 200 ° C, air cooling after welding, it is best to perform stress relief if possible.
3. Multi-layer surfacing is required, and CMC-E30N is used as the base to obtain better welding results.
Hardness HRC 48-52
Main ingredients Cr Si Mn C
Applicable current range: diameter and length m / m 3.2 * 350mm 4.0 * 350mm
Current range (Amp) 70-100 130-150
GB / T 699 Grade 30 Steel Equivalent Grade
The name of GB is 30 steel, the name of DIN standard is C30, the name of ASTM standard is 1030, and the name of JIS standard is S30C.
