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Precision ST52 Hollow Round Bar Hard Chrome Plated Rod ISO9001 Approved

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Precision ST52 Hollow Round Bar Hard Chrome Plated Rod ISO9001 Approved

Country/Region	china
City & Province	wuxi jiangsu

Product Details

Precision ST52 Hollow Round Bar Hard Chrome Plated Rod Tempered With ISO9001:2008

Product Name:	Hollow Round Bar	Standard Length:	1000mm - 8000mm
Diameter:	6mm - 1000mm	Yield Strength:	Not Less Than 355 N/MM2
Straightness:	Not More Than 0.2 MM/M	Surface Hardness:	850-1150 HV (vickers 100g)
High Light:	hollow steel tube , hollow steel bar

Precision ST52 Hollow Round Bar Tempered with ISO9001:2008

Detailed Product Description

1. Material: CK45, ST52, 20MnV6, 42CrMo4, 40Cr
2. ISO9001:2008
3. Complete manufactured equipment
4. Condition: Chrome plated, Quenched / Tempered, Induction hardened, Q / T Induction hardened
5. Application: Mining machinery industry, textile / printing industry and so on

Detailed Description
1.CHEMICAL COMPOSITION

Material	C%	Mn%	Si%	S%	P%	V%	Cr%
Ck45	0.42-0.50	0.50-0.80	0.04	0.035	0.035
ST52	0.22	1.6	0.55	0.035	0.04
20MnV6	0.16-0.22	1.30-1.70	0.10-0.50	0.035	0.035	0.10-0.20
42CrMo4	0.38-0.45	0.60-0.90	0.15-0.40	0.03	0.03		0.90-1.20
40Cr	0.37-0.45	0.50-0.80	0.17-0.37				0.80-1.10

2.MECHANCIAL 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

3. SUPPLY CONDITION
Ground and chrome plated
4. CHROME THICKNESS
20 to 30 micron
5. SURFACE ROUGHNESS
Ra≤0.2 micron and Rt≤2 micro
6. TOLERANCES ON DIA
ISO f7 on the diameter
7.OVALITY
Half of the tolerance ISO f7
8. STRAIGHTNESS
≤0.2MM/M
9. SURFACE HARDNESS
850-1150HV (vickers 100g)
10.COHESION
No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling
in water)
11 .POROSITY
Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
12 CORROSION RESISTANCE
Test in natural salt spray according to ASTM B 117-72hours
Results evaluation according to ISO 4540 RATING 7-10
13. WELDABILITY
Good
14. PACKING
Anti rust oil to be applied on material and each rod to be packed in paper sleeve
15. CERTIFICATE
All certificate related with material heat treatment and plating is required

We imported one continous chrome plating line from Italy at the beginning of 2016. With this new chrome plating line, we will improve efficiency and product quality a lot.The new chrome plating line is the first one in China and will be the only one in the next five years!