Meet any requirement with highly wear-resistant screws.

Reiloy produces highly wear-resistant screws according to customer needs.

Armour alloys for Reiloy screws

Reiloy armour alloys are developed in our in-house materials laboratory. Continuous tough wear tests guarantee a highly effective protection.

The structural photos on the left show a selection of various armour alloys.
Click on the plus to enlarge the view.

Hard-face flight screws

The flight is the area under the most strain in a screw. A specifically applied armour coating protects it highly effectively against wear and corrosion.

The armour coating is 1.5 to 3 mm thick on average. It is applied in an automated plasma powder PTA welding process. So that the screw root and the flight flanks are protected as well, the entire screw surface is ion-nitrided.

At greater corrosion exposure the screw root and the flight flanks receive a hard chrome coating. Or an appropriate corrosion-resistant material is used to meet the requirements.

Technical specifications for hard-face flight screws

PM-HIP-Stabstahl


REILOY material	Norm Bezeichnung	Hardness [HRC]		Wear resistance	Corrosion resistance	Thermal material expansion (25 - 400 °C) [1/MK]	Essential alloy elements [Gew.-%]
		RT	300°C				Cr	V	C
R123.6	X230CrVMoW18-6	64	54	• • • •	• •	11,7	18,0	6,0	2,3
R123.3	X270CrVMoW17-9	64	54	• • • • •	• •	12,1	17,0	9,0	2,7
R123	X220CrVMoW20-4	62	53	• • •	• •	11,4	20,0	4,0	2,2

Delivery parameters


Delivery dimensions		Delivery form
Screws:	Ø 14 mm - 70 mm	Screws: completely finished according to the customers drawing
PM-HIP steel rods:	Ø 25 mm - 70 mm Herstellungslängen bis zu 4000 mm	PM-HIP steel rods

Hardened-through screws

Reiloy produces its highly wear-resistant screw out of PM-HIP alloys that it has developed itself.

The PM-HIP technology permits higher alloy contents as the conventional melt metallurgy. This gives the Reiloy screw made of PM-HIP rod steel a significantly greater resistance to wear than screws made of conventional steels.

Of course we also offer hardened-through screws made of standard materials.

Technical specifications for hardened-through screws

Armor alloys


FE-Basis
REILOY material	Norm description	Hardness [HRC]		Wear resistance	Corrosion resistance	Thermal material expansion (25 - 400 °C) [1/MK]	Essential alloy elements [Gew.-%]
		RT	300°C				Cr	V	C
RC3	X395VCrWMo16-13	56-59	54	• • • • •	• •	12,2	13	16	4,0


CO-Basis
REILOY material	Norm description	Hardness [HRC]		Wear resistance	Corrosion resistance	Thermal material expansion (25 - 400 °C) [1/MK]	Essential alloy elements [Gew.-%]
		RT	300°C hardened				Cr	W	Si	C
RS6	CoCr28W5	38-41	3	•	• • •	13,9	28	5	1,5	0,9
RS12	CoCr27W10	45-48	41	• •	• • •	12,9	27	10	1,5	2,0
RS1	CoCr33W13	52-56	48	• • •	• • •	12,1	33	13	1,2	2,5


NI-Basis
REILOY material	Norm description	Hardness [HRC]		Wear resistance	Corrosion wider- stand	Thermal material expansion (25 - 400 °C) [1/MK]	Essential alloy elements [Gew.-%]
		RT	300°C				Cr	Mo	W	Co	B	SI	C
RP50	NiCr17Mo16	48-52	49	• • •	• • • •	11,7	17	16	6	5	1	1,8	1,1
RP50 Plus	NiW20Cr14Mo13	51-55	52	• • • •	• • • •	11,4	14	13	20	4	0,8	1,5	1,9

Basic materials


material	material Nr.	Yield strength Rp0,2 [MPa]	Tensile strength Rm [MPa]	Elongation to fraction A(I=5d) [%]	Surface hardness after ion-nitriding HV5 bei RT	Depth of nitrided zone [mm]
31CrMoV9	1.8519	780	930	15	720	0,30
X35CrMo17-1	1.4122	470	850	14	1100	0,15
Inconel 625	2.4856	415	870	45	-	-

Delivery parameters


Delivery dimensions	Delivery form
Ø 50 mm - 350 mm	Screw blanks with armouring, pre-ground +0,3 mm to nominal dimension
Length max. 9000 mm	Screws completely finished according to the customer’s drawing