Material 1.5918

Case hardening steel

The material 1.5918 is a chromium-nickel case-hardened steel. 1.5918 has a high strength and toughness. 1.5918 is therefore used for highly stressed parts.

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Standards

HDIN / EN	US-Standard	AFNOR	UNI	JIS	request
17CrNi6-6	SAE 3115/AISI3115 AISI SAE3115/3115				request

Material Category: Case hardening steel

Applications

Automobile and transmission construction
pinion gears
pinion
plates and gears
waves

Heat Treatment

Carburizing 880 - 980 C°
Core hardness 830 - 870 C°
Edge hardness 780 - 820 C°
Temper 150 - 200 C° at least 1 hour

Weldability

The material 1.5918 is suitable for welding.

Chemical Composition

C %	Si %	Mn %	P %	S %	Cr %	Ni %
0,14 - 0,20	max 0,40	0,50 - 0,90	max 0,025	max 0,035	1,40 - 1,70	1,40 - 1,70

Product Specifications

DIN EN 10084
DIN EN 10263-3
DIN EN ISO 683-3

Mechanical Properties

1.5918 Steel bars
	Dimension	Hardness [HB 30]
treated on hardness span	<= 150 mm	175 - 229 HB 30

treated for ferrite-pearlite structure and hardness span	<= 60 mm	156 - 207 HB 30

Soft annealed		<= 229 HB 30

Quenched and tempered at ~ 200 °C		Tensile strength (Rm)
<= 16 mm		>= 1.200 N/mm²
16 - 40 mm		>= 1.100 N/mm²
40 - 100 mm		>= 900 N/mm²

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