Induction hardened chrome plated bars

Products

Chrome plating and induction hardening for high-performance pistons and rods

Modercromo, a manufacturer specializing in the chrome plating of metal bars and tubes, has been operating for over 60 years at the service of major distributors and OEMs in Italy and abroad, ensuring consistent quality and maximum flexibility in product customization.

MODERCROMO produces induction-hardened chrome bars, ideal for high-stress hydraulic applications. This heat treatment, performed by localized induction heating and subsequent controlled cooling, allows to significantly increase the surface hardness and wear resistance of the material, while maintaining good core toughness.

The bars thus treated are particularly suitable for the production of pistons and rods for hydraulic cylinders, especially when subjected to high dynamic loads, impacts or harsh operating conditions.

At MODERCROMO, the combination of selected steel, high-quality chrome plating, and targeted induction hardening is designed based on the final application, thus offering the customer a product optimized in terms of mechanical performance, durability, and operational reliability.

Technical features

Discover the features of our products

STEEL GRADE	HARDNESS	DEPTH
C45E	52 - 60 HRC	0,4 - 3,4 mm
42CrMo4 +QT	52 - 58 HRC	0,4 - 3,4 mm
20MnV6	42 - 48 HRC	0,4 - 3,4 mm
39NiCrMo3 (+QT)	55 - 60 HRC	0,4 - 3,4 mm

DIAMETERS	ISO TOLERANCES	STRAIGHTNESS	ROUGHNESS		OVALIZATION	MICROHARDNESS
DIAMETERS	ISO TOLERANCES	MAX	Ra MAX	Rt MAX	OVALIZATION	MICROHARDNESS
< 20	f7 h6 h7	1,0/1000mm	0,2µm	3,00µm	1/2 Tolerance	> 900 HV_(0,1)
≥ 20	f7 h6 h7	0,5/1000mm	0,2µm	3,00µm	1/2 Tolerance	> 900 HV_(0,1)

Inch	Diameter (mm)	Weight (Kg/m)
	3.0	0.05
	4.0	0.1
	5.0	0.15
	6.0	0.22
	7.0	0.3
	8.0	0.39
	10.0	0.62
	12.0	0.89
1/2"	12.7	0.99
	13.0	1.04
	14.0	1.21
	15.0	1.39
5/8"	15.88	1.55
	16.0	1.58
	18.0	2.0
	20.0	2.47
1"	22.0	2.98
	24.0	3.55
	25.0	3.85
	25.4	3.98
	28.0	4.63
1"1/4	30.0	5.55
	31.75	6.21
	32.0	6.31
	35.0	7.55
1"1/2	36.0	7.99
	38.0	8.9
	38.1	8.95
	40.0	9.86
1"3/4	42.0	10.88
1"3/4	44.45	12.18

Inch	Diameter (mm)	Weight (Kg/m)
	45.0	12.73
	50.0	15.41
2"	50.8	15.9
	55.0	18.35
	56.0	18.93
2"1/4	56.15	20.14
2"1/4	60.0	22.19
2"1/2	63.0	24.47
2"1/2	63.5	24.86
3"	65.0	26.05
	70.0	30.21
	75.0	34.66
	76.2	35.78
	80.0	39.46
	85.0	44.54
3"1/2	88.9	48.72
	90.0	49.77
	95.0	55.61
	100.0	61.65
4"	101.6	63.64
	105.0	67.92
	110.0	74.6
	115.0	83.0
	120.0	88.78
	125.0	96.25
	130.0	104.19
	140.0	120.83
	150.0	139.0
	160.0	158.0
	170.0	178.02
	180.0	200.0
	200.0	246.4

STEELS
UNI	C45E		C45 +QT	42CrMo4 +QT		20MnV6	39NiCrMo3 (+QT)	AISI 420 +QT (1.4028)
	EN 10277		EN 10083-2	EN ISO 683-2		EN 10267	EN 10083-3	EN 10088-3
	< Ø40	≥ Ø40	≤ 100	< Ø120	≥ Ø120	6 < Ø < 200	≤ 100	≤ 160
Yeld Strenght Re N/mm²	> 410	> 275	≥ 550	> 650	> 500	> 420	≥ 850	≥ 500
Tensile Strenght Rm N/mm²	650-1050	560-780	700–850	900-1300	750-950	min. 550	980–1180	700–950
Notch Kv min J -20°C	-		≥ 35 J	min. 35J / 20°C		-	≥ 35 J	-
Hardness HB	min. 172		200–255	min. 240		min. 155	280-340	155-220

STEEL GRADE	C%	NI%	Cr%	S%	Si%	Mn%	P%	Mo%
C45E	0,42-0,50	0,4	0,4	0,04	0,15-0,40	0,50-0,80	0,035	0,1
42CrMo4	0,38-0,45	-	0,90-1,20	0,035	0,4	0,60-0,90	0,035	0,15-0,30
20MnV6	0,16-0,22	-	-	0,035	0,10-0,40	1,30-1,70	0,035	max 0.08
39NiCrMo3 +QT	0,36 - 0,44	1.30 - 1.65	1.30 - 1.70	-	0,15-0,40	0,60-0,90	-	-
AISI 420 +QT (1.4028)	0.16 ÷ 0.25	-	12.00 - 14.00	0,03	1.00	1.50	0.04	-

Available Steel Grades

Discover our steel grades you can use

C45 E/R

20MnV6

42CrMo4/V

39NiCrMo3/V

C45 +QT

AISI 303 / 304 / 316 / 420 B

Possible fields of use

Where our experience GENERATES more value

Thanks to more than sixty years of activity, we have developed solid skills that allow us to offer targeted and reliable solutions to different industrial sectors. Our experience translates into constant quality, continuous innovation and the ability to adapt to the specific needs of each customer. In the most complex and challenging contexts, our services best express their value, ensuring concrete and lasting results.