Carbon Steel Calibrated Round Bar 42CrMo4 Alloy Steel Round Bars

• After-sales Service: Yes
• Warranty: 1 Year
• Type: Pistons
• Application: Cylinder
• Certification: CE, ISO9001: 2000
• Condition: New
• Model NO.: ST
• Journal Surface Roughness: 0.63-0.16μm
• ID Range: 26-800mm
• Straightness: 0.5/1000mm
• Material: Ck45, SAE1045, 4140, 4340, JIS45c, 40cr, 42CrMo
• Diameter: Φ 6-500 mm
• Length: Max 16m
• Transport Package: Paper or Plastic Packaging Wooden Crates or Carton
• Trademark: ISO9001
• Origin: China
• HS Code: 8483109000
• Production Capacity: 20000tons/Year

Product Description

Product Description

CHROME PLATED ROD /CHROME PLATED BAR GENERAL INTRODUCTION

Chrome Plated Rod / Chrome plated bar is usually manufactured from cold rolled or hot rolled carbon steel roundbars, by using high precision centerless grinding and polishing methods, and then chrome plated to a min. platingthickness of 20 microns (which is 0.0008″). The chrome plating layer provides corrosion resistance and a highlyreflective appearance.

All the above providing us the ability to produce the best quality hydraulic cylinder rod (hydraulic cylinder shaft around.

Chrome plated rods are also known as hard chrome plated shafts, chrome steel bar, chrome plated shafting, and chrome rod for hydraulic cylinders.

Material	CK45, SAE1045, 4140, 4130, 4340, SAE1518, SAE4145, JIS45C, 40Cr, 20MnV6, 42CrMo, SS431, SS430, Stainless Steel 304/316/2205, etc.
Diameter	Φ 6-500mm
Length	max 20 meters
Salt Spray Test	Passed As Per Request
Chrome Layer	min 20/25/30/50 Micron or customized
Hardness of Chrome Layer	850 HV (min) - 1150 HV
Roughness	Ra <= 0.4
Straightness	<= 0.5/1000
Diameter Tolerance	ISO f7/f8/f9/h8/h9 or as request
Roundness	Half of the tolerance ISO f7
Heat Treatment Type: 1) Normal no heat 2) Q+T (Quenched + Tempered) 3) Induction Hardened
Product Offerings	Hard Chrome Bar, Hard Chrome Rod, Induction Hardened Chrome Bar, Hydraulic Cylinder Shaft, Hydraulic Cylinder Rod.

 

Chemical Composition

Material	C%	Mn%		Si%		S%	P%	V%	Cr%
Ck45	0.42-0.50	0.50-0.80		0.17-0.37		≤0.035	≤0.035		≤0.25
ST52	≤0.22	≤1.6		≤0.55		≤0.04	≤0.04	0.02-0.15
20MnV6	0.17-0.24	1.30-1.70		0.10-0.50		≤0.035	≤0.035	0.10-0.20	≤0.30
42CrMo4	0.38-0.45	0.50-0.80		0.17-0.37		≤0.035	≤0.035	0.07-0.12	0.90-1.20
40Cr	0.37-0.45	0.50-0.80		0.17-0.37		≤0.035	≤0.035		0.80-1.10

Mechanical Properties

Material		T.S N/MM2		Y.S N/MM2		E%(MIN)	CHARPY	CONDITION
CK45		610		355		15	>41J	NORMALIZE
CK45		800		630		20	>41J	Q+T
ST52		500		355		22		NORMALIZE
20MnV6		750		590		12	>40J	NORMALIZE
42CrMo4		980		850		14	>47J	Q+T
40Cr		1000		800		10		Q+T

Grade of tolerance

Grade of tolerance Dia mm o	f			h
	f7	f8	g6	h7	h8	h9
3mm	-0.006 -0.016	-0.006 -0.020	-0.002 -0.008	0 -0.010	0 -0.014	0 -0.025
3mm-6mm	-0.010 -0.022	-0.010 -0.028	-0.004 -0.012	0 -0.012	0 -0.018	0 -0.030
6mm-10mm	-0.013 -0.028	-0.013 -0.035	-0.005 -0.014	0 -0.015	0 -0.022	0 -0.036
10mm-18mm	-0.016 -0.034	-0.016 -0.043	-0.006 -0.017	0 -0.018	0 -0.027	0 -0.043
18mm-30mm	0.020 -0.041	-0.020 -0.053	-0.007 -0.020	0 -0.021	0 -0.033	0 -0.052
30mm-50mm	-0.025 -0.050	-0.025 -0.064	-0.009 -0.025	0 -0.025	0 -0.039	0 -0.062
50mm-80mm	-0.030 -0.060	-0.030 -0.079	-0.010 -0.029	0 -0.030	0 -0.046	0 -0.074
80mm-120mm	-0.036 -0.071	0.036 -0.090	0.012 -0.034	0 -0.035	0 -0,054	0 0.087
120mm-180mm	-0.043 -0.083	-0.043 -0.106	-0.014 -0.039	0 -0.040	0 -0.063	0 -0.100
180mm-250mm	-0.050 -0.096	-0.050 0.122	-0.015 0.044	0 -0.046	0 -0.072	0 -0.115
250mm-315mm	-0.056 -0.108	-0.056 -0.137	-0.017 -0.049	0 -0.052	0 -0.081	0 -0.130
315mm-400mm	-0.062 -0.119	-0.062 -0.151	-0.018 -0.054	0 -0.057	0 -0.089	0 -0.140
400mm-500mm	-0.068 -0.131	-0.068 -0.165	-0.020 -0.060	0 -0.063	0 -0.097	0 -0.155

Piston Rod Production Process

Delivery Condition:

• Hard Chrome Piston Rod
• Quenched & Tempered (Q+T) Rod
• Induction Hardened Rod
• Q+T Induction Hardened Rod

Overview

OVERVIEW OF OUR CHROME PLATED BAR -CHROME ROD SUPPLIER

• Steel grade:
  Our hard chrome plated shafts are available with steel grade of SAE 1045, CK 45. C45.
  and stainless steel available on request.
• Size range:
  Our factory produces chrome steel bar / chrome plated shafting in a wide range ofmetric and imperial sizes as below.
  External diameter 10 mm to 800 mm;
  Imperial size chrome bar available from 3/8″ to 32″
• Length:
  Our factory supplies chrome rod for hydraulic cylinders with random length and fixedlength (cut to length) up on customer's request, the max length can be 12 meters.
• Tolerance:
  Our chrome plated rods are supplied with diameter tolerance f7, f8, g6 on customers request.
• Surface roughness:
  The surface roughness of our factory's hard chrome plated shafts is around Ra0.2um(8 Ra),max. Ra0.4um (16 Ra).
• Hard Chrome Plated Thickness:
  Our chrome plated shafting normally is with chrome plated thickness of Min. 25Microns (0.001″);And other chrome plated thickness available on customers request, max. 100 xkmicrons.
• Our chrome steel bar can pass the salt spray tested to 72h /96h /200h in accordance with ASTM B-117upon reguests.
• Custom made diameters and chrome thickness of the chrome steel bar is available uponrequest.
• Our factory's chrome rod for hydraulic cylinders are available with or without HardenedInduction
• Packing: Our chrome plated rods are packed in cardboard tubes, to prevent any damageof the outer diameter during loading, shipping and unloading.

Specification

PRODUCT STANDARDS

Our chrome plated bar usually is manufactured upon customers' specification, and our chrome plated rod meets below standards. 

• ASTM A108, 
• ASTM A311 
• other popular standards.

MATERIAL CHEMICAL COMPOSITION OF HARD CHROME PLATED SHAFTS

As one of the leading chrome plated bar manufacturers and suppliers, We supply chrome plated rod in medium carbon steel grades according to customers request, and the most popular steel grade is AISI 1045, JIS S45C, SAE1045, DIN CK45, SAE 4140, 42CrMo, and so on.

Here below is the chemical composition of steel grade SAE 1045 / CK45:

Steel Grade	Chemical Composition %
	Carbon	Mn	Si	P	S
SAE 1045	0.43-0.50	0.60-0.90	-	0.040 Max	0.050 Max
CK 45	0.42-0.50	0.50-0.80	0.40 Max	0.035 Max	0.035 Max

And below is the chemical composition of 4140 chrome plated rod for shafts.
 

SAE 4140	C%	Si%	Mn%	P%	S%	Cr%	Mo%
Min	0.36	0.1	0.65			0.75	0.15
Max	0.44	0.4	1.1	0.04	0.04	1.2	0.35

MECHANICAL PROPERTIES OF CHROME PLATED SHAFTING

Steel Grade	Mechanical Properties
	Yield Strength	Tensile Strength	Elongation	Hardness
SAE 1045	75000 psi / 517 Mpa	85000 psi / 585Mpa	10%	Rc 60-72
CK 45	75000 psi / 517 Mpa	85000 psi / 585Mpa	10%	Rc 60-72

With special heat treatment, the yield strength of our chrome plated rod can be min. 100K psi (690 Mpa).

For chrome plated shafts require high strength, we can supply SAE 4140 hard chrome plated bar. Here below is the machanical properties of SAE 4140.

4140	Yield strength	Tensile Strength	Elongation	Hardness HB
Min	800 Mpa /115K psi	900 Mpa /130K psi	20%	270 HB

 

Sizes

CHROME PLATED PISTON ROD DIMENSIONS

As a leading chrome plated piston rod manufacturer and chrome rod supplier, we produces chrome plated barwith outer diameterupto 1000 mm, and here below is some popular sizes:
 

Diameter(imperial size)		Weight per Foot			Diameter(metric size)		Weight per Meter
(Inches)		(Lbs.)			mm		(KG.)
0.375		0.375			10		0.62
0.438		0.512			12		0.89
0.5		0.668			14		1.21
0.625		1.043			15		1.39
0.688		1.264			16		1.58
0.75		1.502			17		1.78
0.875		2.044			18		2
0.938		2.349			20		2.47
1		2.67			22		2.98
1.063		3.017			25		3.85
1.125		3.379			28		4.83
1.188		3.768			30		5.55
1.25		4.172			32		6.31
1.313		4.603			35		7.55
1.375		5.048			36		7.99
1.5		6.008			40		9.86
1.563		6.523			45		12.48
1.625		7.05			50		15.41
1.688		7.608			55		18.65
1.75		8.177			56		19.33
1.875		9.387			60		22.19
1.938		10.028			63		24.47
2		10.68			65		26.05
2.125		12.057			70		30.21
2.25		13.517			75		34.68
2.375		15.06			80		39.46
2.5		16.688			85		44.54
2.625		18.398			90		49.94
2.75		20.192			95		55.64
2.875		22.069			100		61.65
3		24.03			105		67.97
3.25		28.202			110		74.6
3.375		30.413			115		81.53
3.5		32.708			120		88.78
3.625		35.085			125		96.33
3.75		37.547			130		104.19
4		42.72			140		120.83
4.25		48.227			150		138.71
4.5		54.068			160		157.82
4.75		60.242			170		178.17
5		66.75			180		199.75
5.25		73.592			200		246.6
5.5		80.768			250		385.31
6		96.12
6.5		112.808
7		130.83
7.5		150.188
8		170.88
8.5		192.908
9		216.27
10		267
11		323.07
12		384.48

Note: Other sizes are available on customer's request, Our Chrome rod max size is diameter 1000 mm.
 

Features

WHAT IS THE ADVANTAGES OF OUR CHROME PLATED ROD?

Our factory's chrome rod for hydraulic cylinders is favored by customers because of the following advantages:

a. Carbon steel balances durability, hardness, and wear resistance using formability, weldability, and durability;

b. Chrome plating provides corrosion resistance along with an Extremely reflective look

c. High precision tolerances, which ensures when used to make hydraulic piston rod, it can fit the cylinder precisely.

d. Good Hardness: the surface hardness attaining HV850 minimal and upward, which not only help improve wear resistance but also help extend the life span of these chrome plated rods, thereby helping the consumer save the cost.

e. High performance of strength: The yield strength of chrome plated bars can be 75000 psi up to 100000 psi, depends on the material and heat treatment method.

Application

APPLICATIONS OF CHROME ROD

Chrome plated bar is mostly designed to be used for hydraulic piston rod and pneumatic piston rod manufacturing and repairing. So some people also may call this product hydraulic cylinder rod approximately.

However, besides the above, chrome plated rod can also be used in applications where high performance surface finishing and high accuracy dimension tolerance are required.

Here below is the application list of the chrome rods:

• Chrome rod for hydraulic cylinders, this is the most popular application.
• Pneumatic cylinders / air cylinders (chrome plated piston rods/ chrome cylinder rod)
• Guide rods for plastic manufacturing machine and hydraulic machinery
• Rollers for machines, such as packing machine rollers, printing machine rollers
• Shaft for machinery, such as Textile machinery center shaft, Transport machinery center shaft, etc.
• Ejector rods for injection molding machines
• Vibration absorbers and pistons for some industrial machinery.

Packing

Chrome plated rods are typically packaged with a protective film or coating to prevent surface damage. They are further wrapped in paper or plastic for added protection, and often shipped in wooden crates or sturdy cardboard boxes to safeguard against mechanical damage during transport.

 

WHY CHOOSE US?

Here below are the main advantages of our products and services.

• Rich manufacturing experience: Our factory has nearly 15 years manufacturing,experience for chrome platedrods;
• Advanced manufacturing equipment and facilities,including:
  Cold drawing machine, honing machine, skiving& roller burnishing machine, straightening, machine, polishing machine, heat treatment furnace, grindingmachine, etc. Our professional engineers do regular scheduled maintenance on these machines to guaranteethem work well.
• High quality raw material:
  Our raw materials for chrome plated shafting are mainly from the famous Chinasteel makers, such as TPCO, BAO STEEL, SHA STEEL, which are best and largest steel rod manufacturers inChina.
• High precision:
  Our chrome plated rod are manufactured with high dimension precision, tolerance can be lsOf7, f8 or g6, upon request. which ensures the precision of the hydraulic cylinder or the machine.
• Reliable Packing:
  All the chrome plated shafts will be oiled by the anti-rust oil before delivery. And to protectthe outer surface of the chroming of piston rods, we will use cardboard (paper pipe) to pack each rod, andthen pack with seaworthy package such as wooden cases or rope wraps.
• Strictly quality control:
  Our factory has a Qc team of more than 10 persons. All the chrome rods will beinspected before delivery.
• The inspections including:
  Chemical Analysis Test, Tensile Test, DimensionInspection, Roughness Testing, Chrome plated thickness test and other tests according to standards andcusotmer's requirements.
• Mature quality management system:
  Our Total guality management system ensures all the working processesrelated to product quality are in good control.

Our chrome-plated rods have been dispatched globally, catering to the diverse needs of hydraulic cylinder rods, machine shafts, and various other applications. Esteemed by our clientele both within China and internationally, including the USA, Canada, Mexico, Colombia, Saudi Arabia, UAE, South Africa, Russia, Belarus, Thailand, Indonesia, Vietnam, Australia, Ukraine, Brazil, Turkey, Korea, New Zealand, Singapore, Kuwait, and more, our products have solidified a prestigious standing. 
 

The 42CrMo4 alloy steel round bar, crafted from high-grade carbon steel, stands out in the industry for its exceptional strength and durability. This product is meticulously calibrated to ensure precise dimensions and superior performance, making it a preferred choice for engineering applications requiring high tensile strength and resistance to wear and tear.

Composed of a balanced chemical structure that includes chromium, molybdenum, and manganese, the 42CrMo4 round bar provides enhanced toughness and hardenability. The presence of chromium offers excellent corrosion resistance and increases the steel's ability to withstand high temperatures without losing its structural integrity. Molybdenum enhances the material's strength and helps in maintaining its strength at high temperatures, making it ideal for critical components in the automotive and aerospace industries.

The round bars are produced through a rigorous process that involves controlled heating and cooling to optimize the mechanical properties. This process ensures that each bar meets stringent industry standards for both chemical composition and mechanical performance. The surface of each bar is free from defects and has a smooth finish, which reduces the need for further processing and allows for immediate integration into various manufacturing processes.

These 42CrMo4 alloy steel round bars are versatile and widely used in the manufacture of gears, axles, shafts, and other machinery components where high strength and resistance to impact are required. They are also suitable for creating parts that must endure heavy loads and continue operating in harsh environments.

Each batch of 42CrMo4 alloy steel round bars is subject to rigorous testing, including ultrasonic tests, to ensure that there are no internal defects. The products are also certified to meet international standards such as ISO, SAE, and ASTM, providing further assurance of their quality and reliability.

For businesses seeking a reliable material that provides both performance and longevity, the 42CrMo4 alloy steel round bar is an excellent choice. Its balanced composition and superior processing not only meet but often exceed the demanding requirements of modern engineering applications.

QUESTIONS & ANSWERS

QUESTION 1: WHAT IS THE LEAD TIME OFCHROME PLATED RODS?
Answer: As one of the leading, china chrome plated bar suppliers, we stock a lot of different sizes and materials ofmother steel rods, so normally our delivery time is 10 - 20 days depends on the quantity and size.

OUESTION 2: HOW CAN YOU ENSURE THE OUALITYOF THE HARDCHROME PLATED RODS?
Answer: Yes, we execute Total Ouality Management System in our chrome plated bar factory. We only use rawmaterials (round steel bar) made in China top quality steel maker such as TpcO, Sha-Steel, Huaigang Special Steeland so on. And we wilinspect every chrome plated bar before packing, the hard chrome plated rod will be suppliedwith mill test certificate according to EN 10204 /3.1.

QUESTION 3: IS YOUR COMPANYCHROME PLATED BAR MANUFACTUREROR SUPPLIER TRADING COMPANY?
Answer: We are true chrome plated bar factory company located in Wuxi, jiangsu, we are one of the professionalchrome plated bar and hydraulic cylinder tube manufacturers in china, we welcome customers to come to visit ourfactory. Then you can see the details.

OUESTION 4: HOW CAN YOU PROTECT THE OUTER SURFACE OF THECHROMED STEEL BARS FROM DAMAGE DURING TRANSPORTATION?
Answer: To protect the outer surface of the hard chrome plated bar, we will put each chromed rod into a paper tube (cardboard sleeve). And then we will pack the chromed bar into wooden cases.

OUESTION 5: DID YOU EXPORT YOUR CHROME PLATED SHAFTS TO OVERSEA COUNTRIES? AND WHAT IS YOUR MAIN OVERSEA MARKET?
Answer: Yes, as the one of the largest chrome plated shaft suppliers in China, we exported our chrome plated shaft tomany customers in oversea countries, our main market including USA, Vietnam, Australia, Russia, UAE, Canada,
South Africa, Thailand, Brazil, etc.

QUESTION 6: WILL CHROME PLATED STEEL BAR RUST?
Answer: No, Steel rod with Chrome plating will not rust, however when the chrome plating is damaged - it can appear dull. The steel core can rust if plating is lost through accidental damage or with natural wear over time.