Hot-Work Tool Steel

SITHERM Hot-Work Tool Steel

Name: SITHERM Hot-Work Tool Steel
Brand: SIJ Metal Ravne

Hot-work tool steel brand produced by SIJ Metal Ravne and distributed by HTS Group

SITHERM Hot-Work Tool Steel from SIJ Metal Ravne is made for high-temperature tooling under cyclic thermal and mechanical loads, with high tempering resistance, toughness and resistance to heat checking.

Manufactured bySIJ Metal Ravne · HTS Group

Two machined hot-work die blocks in SITHERM S360R — SITHERM S360R die blocks.

52–56 HRCAchievable hardness, 2344 / H13

50–56 HRCAchievable hardness, 2343 / H11

NADCA#2292343R and S353R

Ø1,000 mmRound bars up to

ESRRemelted grades available

Overview

Hot-work steel from the SIJ production route

SITHERM is a hot-work tool steel brand produced by SIJ Metal Ravne and distributed and serviced by HTS Group / Ravne Steel Center. It is made for high-temperature tooling exposed to cyclic thermal, mechanical and dynamic loading.

SIJ Metal Ravne provides the metallurgical base: steelmaking, ESR remelting, forging, rolling, heat treatment, machining and R&D. HTS provides cutting, machining, heat-treatment support, technical consultation and delivery.

HTS states it has more than 8,000 tons of steel available, more than 50 sawing machines and a wide range of machining and heat-treatment possibilities.

Grades

Main SITHERM grades

1.2343 / H11

SITHERM 2343

General hot-work steel for die casting, extrusion and forging.

Achievable hardness: 50–56 HRC

1.2344 / H13

SITHERM 2344

Common hot-work grade for tools needing strength and wear resistance.

Achievable hardness: 52–56 HRC

1.2365 / H10

SITHERM 2365

Hot-work steel for demanding thermal applications.

Achievable hardness: 44–54 HRC

1.2367

SITHERM 2367

Improved hot strength and thermal resistance.

Achieved hardness: about 55 HRC
HTS achievable hardness: 53–57 HRC

ESR remelted

SITHERM 2343R

General-purpose ESR grade for high-runner high-pressure die casting tools, certified to NADCA#229.

Achievable hardness: 50–56 HRC

NADCA#229 Grade C

SITHERM S353R

High impact and fracture toughness and resistance to thermal fatigue, for die casting of light metals.

Supply condition: Annealed, max. 229 HBW / 735 N/mm²
Achievable hardness: 54–56 HRC

Higher C and Ni

SITHERM S360R

Working hardness above 55 HRC with impact and fracture toughness, for forging, die casting, hot stamping and hot cutting knives.

Achievable hardness: 62–64 HRC

Custom grade

SITHERM S361R

Higher toughness at ambient and elevated temperatures, higher heat conductivity and better through-hardenability.

Achievable hardness: 56–58 HRC

High thermal conductivity

SITHERM S140R

For die casting inserts, hot runner systems, hot shearing blades, extrusion dies and hot stamping tools.

Working hardness: 44–50 HRC
Achievable hardness: 50–52 HRC

Product Range

Product forms and dimensions

Plates

15–100 mm thick, 1,000–2,500 mm wide, 4,000–12,000 mm long.

Square and flat sections

Square up to 600 mm; flat up to 1,000 × 500 mm.

Round bars

Up to Ø1,000 mm.

Forgings, welding wire, electrodes

Supplied depending on grade.

HTS service centre

Bars up to Ø700 mm.
Blocks up to 600 × 1,600 mm.
Plates up to 300 × 2,000 mm.

Applications

Where SITHERM is used

High-pressure die-cast aluminium housing

High-pressure die casting

Die casting tools for aluminium, light alloys and copper alloys.

Die forging tools

Forging dies exposed to cyclic thermal and mechanical loading.

Extruded aluminium profiles standing upright

Extrusion dies

Extrusion dies and tools for aluminium alloys.

Hot cutting and stamping

Hot cutting tools, hot shearing blades and hot stamping tools.

CoresMoldsInsertsHot runner systemsTools exposed to overheatingTools under cyclic thermal loading

Features

Properties for hot-work tooling

Thermal performance

Suitable for high-temperature tooling and cyclic thermal loading.
High tempering resistance.
Resistance to heat checking, thermal fatigue and thermal cracking.

Mechanical properties

High toughness and good ductility.
Good through-thickness properties.
Suitable for mechanical and dynamic loading.

Grades and forms

Standard and ESR remelted grades.
Wider range includes 2345, 2885, S350R and S354R.
Plates, square and flat sections, round bars, forgings, welding wire and electrodes.

Benefits

Why SITHERM for hot work

Longer tool life. Longer tool lifetime in hot-work applications.

Thermal fatigue resistance. Better resistance to heat checking and thermal fatigue.

Less cracking. Reduced risk of premature tool cracking under cyclic loading.

ESR cleanliness. ESR grades provide higher cleanliness for demanding applications.

Die casting and extrusion. Improved performance in die casting and extrusion tools.

Grade selection support. HTS technical support helps select the correct SITHERM grade for the process.

Need support with this hot-work steel?

Share your process, cast or forged alloy, tool size and required hardness, and our Performance Engineering team will support you with the suitable product information.

Performance Engineering Section