DIN 17102 EStE255 automobile structure steel

DIN 17102 EStE255 Automobile Structure Steel Introduction

DIN 17102 EStE255 is a hot-rolled carbon and low-alloy high-strength steel plate specifically designed for automotive structures. It falls under the broader DIN 17102 standard but with stricter specifications for chemical composition and mechanical properties, making it ideal for demanding applications.

DIN 17102 EStE255 chemical composition:

Grade	EStE255
C	≤0.16
Si	≤0.40
Mn	0.50~1.30
P	≤0.025
S	≤0.015
N	≤0.02
Al	≥0.02
Cr	≤0.3
Cu	≤0.2
Mo	≤0.08
Ni	≤0.3
Nb	≤0.03
Nb+Ti+V	≤0.05

DIN 17102 EStE255 characteristics:

Grades		EStE255
Tensile Strength Rm for product thicknesses s,in mm (N/mm²)	s≤70	360~480
	70＜s≤85	350~470
	85＜s≤100	340~460
	100＜s≤125	330~450
	125＜s≤150	320~440
UpperYield Stress ReH² for product thicknesses s,in mm (N/mm² min.)	s≤16	255
	16＜s≤35	255
	35＜s≤50	245
	50＜s≤60	235
	60＜s≤70	235
	70＜s≤85	225
	85＜s≤100	215
	100＜s≤125	205
	125＜s≤150	195
Elongation after fracture3) (Lo=5do) % min.		25
Mandrel diameter for bend test 4), 5)	Longitudinal	1a
Mandrel diameter for bend test 4), 5)	Transverse 6)	1a

DIN 17102 EStE255 advantages compared to standard EStE255:

Improved cold formability: Easier to bend and shape without compromising strength.
Enhanced weldability: Creates stronger and more reliable weld joints.
Superior low-temperature toughness: Resists cracking and damage even in harsh winter conditions.
High fatigue strength: Can withstand repeated stresses without fatigue or failure.

DIN 17102 EStE255 Primary applications:

Critical load-bearing components in automobiles, such as chassis, pillars, and suspension parts
High-performance vehicle frames and structures
Safety-critical components requiring exceptional strength and reliability
Applications demanding both strength and cold formability

DIN 17102 EStE255 Things to consider:

EStE255 typically requires additional processing, such as quenching and tempering, to achieve its full properties.
Welding should be done with appropriate procedures and filler materials to maintain the material's integrity.
Cost may be slightly higher compared to standard EStE255 due to stricter production requirements.

DIN 17102 EStE255 is a premium automotive structural steel offering exceptional strength, weldability, and cold formability for demanding applications. It plays a crucial role in enhancing safety, performance, and durability in modern vehicles.