Material Grade: GS140, GS150, GS160, GS190

Anti-Sticking Universal Section & Bar Mill Graphitic Steel Rolls (GS140-GS190 Series)

Designed to provide a unique combination of mechanical strength and thermal fatigue resistance. The GS series incorporates controlled amounts of free graphite within a tempered pearlitic matrix, assisting in self-lubrication and reducing the risk of fire crazing in heavy-duty roughing and section rolling stands.

By Material

By Application

By Tooling

Key Mill Applications (Recommended Stands)

Universal Section Mills & Billet Rolling

Applicable Grades: GS150, GS160, GS190

Focus: Engineered for roughing and intermediate stands in universal section mills, structural rail/beam lines, and primary billet mills. Excellent structural strength combined with uniform wear resistance ensures precise control over complex profiles.

Anti-Sticking Hot Strip Roughing & Edging

Applicable Grades: GS140, GS150

Focus: Designed for hot-rolled strip roughing work rolls and vertical edging stands. The presence of free graphite acts as a natural solid lubricant, drastically reducing friction and effectively preventing rolling slippage or strip welding.

Wire Rod & Bar Mills (Roughing & Intermediate Stands)

Applicable Grades: GS160, GS190

Focus: Optimized for intense thermal cycling conditions in bar and high-speed wire rod roughing trains. Superior thermal shock resistance and minimal hardness drop guarantee extended campaign life and stable roll profile retention.

Chemical Composition & Physical Properties

We optimize the distribution of free graphite through precise control of Silicon and Carbon content. The specific metallurgical parameters for the GS series are detailed below:

Code (代码)	C	Si	Mn	Cr	Ni	Mo	Barrel Hardness (HSD)
GS140	1.30-1.50	1.30-1.60	0.50-1.00	0.40-1.00	–	0.20-0.50	36-46
GS150	1.40-1.60	1.00-1.70	0.60-1.00	0.60-1.00	0.20-1.00	0.20-0.50	40-50
GS160	1.50-1.70	0.80-1.50	0.60-1.00	0.50-1.50	0.20-1.00	0.20-0.80	45-55
GS190	1.80-2.00	0.80-1.50	0.60-1.00	0.50-1.00	0.60-2.00	0.20-0.80	50-60

* P ≤ 0.035, S ≤ 0.030 controlled for all GS series grades.
* Neck Hardness: ≤ 46-50 HSD depending on specific grade.

Metallurgical Excellence

Why do DURON GS Series rolls deliver stable roughing performance?

Graphite-Assisted Bite & Lubrication : The presence of free graphite flakes provides a natural self-lubricating effect on the roll surface. This assists in reducing the friction coefficient during high-load reductions, helping to mitigate the risk of “sticking” and ensuring a reliable bite of the incoming billet.
Thermal Shock Resistance: The graphitic structure improves the material’s thermal conductivity and provides internal stress relief points. This characteristic helps the roll surface withstand the rapid heating and cooling cycles characteristic of roughing operations, effectively delaying the formation of deep thermal cracks.
Balanced Toughness and Wear Resistance : By bridging the gap between alloy steel and cast iron, the GS series offers the necessary mechanical integrity to handle heavy reductions while providing higher wear resistance than standard cast steel grades. This balance supports stable mill operations and contributes to the optimization of dressing cycles.

Manufacturing Control & Inspection

100% Non-Destructive Testing

Every roll undergoes rigorous Ultrasonic Testing (UT) at the working layer and bonding zone to eliminate internal voids and ensure structural integrity under heavy loads.

Precision CNC Machining

Roll necks and barrel profiles are machined using heavy-duty CNC equipment, strictly adhering to your drawing's dimensional and runout tolerances for perfect bearing fitment.

Metallurgical Verification

Chemical compositions are analyzed via spectrometer pre-pouring, and multi-point hardness mapping is conducted post-heat treatment to guarantee the specified hardness gradient.

Quality Traceability

All dispatched rolls are accompanied by a comprehensive inspection certificate, documenting chemical composition, hardness distribution, and UT reports.