Bespoke Shaft Forgings for Customized Machinery Manufacturing Needs

• Customization: Available
• After-sales Service: 1year
• Warranty: 1year
• Model NO.: 20#/35#/45#/CrMo/CrNiMo/40Cr/20C/20CrMnMo/304/2Ni4
• Speed: High Speed
• Cooling Cylinder: Oil
• Intake Pressure Impulse: Supercharged
• Piston Movement: Reciprocating
• Fuel: Ethanol
• Number of Strokes: Two-Stroke
• Cylinder Arrangement Form: V
• Number of Cylinders: 10-Cylinder
• Type: Electric Motor
• Usages: Heavy Machinery,Train Wheel,Pump, Winning Equipmen
• Alloy No.: 20#-50#,20-45crmo
• Examining Report: Ultrasonic Test Report;Mic Test Report
• Transport Package: Box
• Specification: Diameter: 100-3000mm; Length 1000-6000mm
• Trademark: Changli Equipment
• Origin: Jiangsu Province, China
• HS Code: 7201500010

Product Description

Product Description

structural carbon steel :45# with details in under sheet :

Standard No.	Alloy No.	Chemical compositions(%)
		C	Cr	Mn	Ni	P	S	Si
GB/T699-1999	45#	0.42~0.50	≤0.25	0.50~0.80	≤0.25	≤0.035	≤0.035	0.17~0.37
	Mechanical Property	Tensile Strength(Mpa)		Yeild Strength(Mpa)		Elongation(%)		Contraction of area Z(%)
		≥600		≥355		≥16		≥40

The correlation between properties and parameters-S45C (JIS)-SAE1045(Aisi)-SM45 of No. 45 steel(45 steel) was studied:
No. 45 steel is a carbon structural steel with 0.45% carboncontent. It is characterized by low price, good cutting performance, high hardness after quenching, good strength, toughness and wear resistance after quenching and temperingtreatment, is widely used in manufacturing structural partsand low-grade plastic mold. "45 steel" is a popular name, thesymbol is generally recorded as"45 #". In fact GB standardsteel number is"45", it is not a sequential number, read as"45steel" is not very accurate. Ingredient code 45 steels of similar designation are S45C (JIS) and 1045(Aisi) . In addition, ourcountry metallurgical technology standard has SM45 brandnumber to express the plastic mold use specially. Comparedwith 45 steel, SM45 has lower phosphorus and sulfur contentand better steel purity.

Standards	YB/T 094	AISI	JIS G4051
Alloy No.	SM45	1045	S45C
C	0.42-0.48	0.43-0.50	0.42-0.48
Si	0.17-0.37		0.15-0.35
Mn	0.50-0.80	0.60-0.90	0.60-0.90
P	<0.030	<0.030	<0.030
S	<0.035	<0.035	<0.035

Recommended process specification for heat treatment andhardness: quenching temperature 820 - 860" C, water-oroil-cooled, hardness 250 HRC. Recommended tempering pro-cess specifcation: tempering temperature is 500 - 560" C, aircooling, hardness is 25 - 33HRC. Tempering in this temperature range is the tempering treatment, Quenching and tempering make the strength, plasticity and toughness of 45 steelget a good balance, the comprehensive performance is good,can adapt to the alternating load environment. After quench-ing and tempering, the surface hardness of 45 steel is low anddoes not wear well. So commonly used quenching and tempering + surface quenching to improve the surface hardnessof parts.

Tempering temperature	After quenching	Unit centigrade
		200	300	400	500	550	600
Hardness HRC	57	55	50	41	33	26	22

 

Mechanical properties (GB/T 699-1999)
Sample size		mm	25
Heat treatments recommended	Normalizing	ºC	850
	Quenching	ºC	840
	Tempering	ºC	600
Mechanical properties	Tensile strongth	Mpa	≥600
	Strong yield	Mpa	≥355
	Elongation	Mpa	≥16
	Section shrinkago	Mpa	≥40
	Impact	Mpa	≥39
Hardness of delivery		HB	≤229
		HB	≤197

Company Profile

Product real picture

• What is the difference between forging and casting?

  Forging: This transformative process involves reshaping a solid material from one form to another. Casting: This process transforms molten, shapeless liquid metal into a solid form with definitive shape. The casting process involves pouring molten metal into a mold to obtain a casting. The casting profession focuses on the intricacies of metal melting and stringent process control during the casting phase. Forging, conversely, is a plastic forming process in the solid state, divided into hot and cold processing. Forging methods include extrusion, drawing, roughening, punching, and more. While casting is characterized as a solid-liquid-solid transformation, forging is a solid-to-solid transformation where a solid material reshapes at high temperatures. These differences highlight the distinct procedures and processes involved in each method.

• How to choose high-quality forgings?

  To ensure the highest quality of forgings, rigorous inspection methods are applied, including both external observation and internal examination. The external observation method entails scrutinizing the product's appearance, assessing shape, geometric dimensions, and surface conditions to ensure compliance with standards and absence of external defects. This involves checking if the external dimensions adhere to specifications and if the surface is free from cracks, wrinkles, bubbles, indentations, pits, impurities, scratches, etc. Internal examination delves deeper, analyzing chemical composition, macroscopic and microscopic structures, and mechanical properties. This process employs specialized high-magnification instruments to identify internal flaws like fractures, shrinkage, dendrites, white spots, disordered flow lines, and throughflow anomalies. The inspection also evaluates tensile strength, ductility, hardness, plasticity, and heat resistance temperature of the forging, ensuring comprehensive quality control.

• What are the characteristics of the forging process for blank forgings?

  The forging process for circular forgings encompasses critical steps such as pier roughening, elongation, punching, and expanding. A key distinction between free forging and ring rolling processes lies in the hole expansion technique. In ring forging production, free forging typically employs a horse screw for hole expansion, whereas ring rolling utilizes a rolling method for the same purpose. This differentiation in processes underscores the tailored approaches needed for specific forging requirements.