P L A S T I C M O U L D S T E E L

RS 110R A V N E X

→ P L A S T I C M O U L D S T E E L

RS grade W.Nr. DIN AISI

RS 100 1.2312 40CrMnMoS8-6 ~P20

RS 101 1.2311 40CrMnMo7 ~P20

RS 103 1.2738 40CrMnNiMo8-6-1

RS 105 1.2738 mod. HH

RS 110 RAVNEX 1.2738 mod. HH ESR

RS 118 1.2085 X33CrS16

RS 120 RAVNEX

RS 130 1.2083 ESR X42Cr13 420

RS 131 1.2083 X42Cr13 420

RS 140 1.2316 ESR X36CrMo17

RS 141 1.2316 X36CrMo17

Family of RS plastic mould steel

GENERAL CHARACTERISTICS . . . . . . . . . . . . 4Chemical composition Application Microstructure in delivered condition Toughness Qualitative comparison

PHYSICAL PROPERTIES . . . . . . . . . . . . . . 7

MECHANICAL PROPERTIES . . . . . . . . . . . . 8

Compressive yield strength

CONTINIOUS COOLING CURVES-CCT . . . . . . . . . 9

HEAT TREATMENT . . . . . . . . . . . . . . 10Annealing Stress relieving Hardening Tempering Dimensional changes during hardening and tempering

WELDING AND EDM . . . . . . . . . . . . . 12Welding

Electrical discharge machining

RECOMENDATIONS FOR MACHINING . . . . . . . . 13

RS 110

C O N T E N T S

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RS 110 RAVNEX is a premium plastic mould steel produced in METAL RAVNE. Tool steel RS 110 RAVNEX is known for its:

• Excellent cleanliness• High polishability• Hardness homogeneity• Improved weldability• Good photo-etching properties• High wear resistance in HH version

• Nitrability• Good weldability• Machinability

Controlled chemical composition with minimal concentration of detrimental elements and controlled cleanliness. Cleanliness according to DIN 50602 K1 ≤ 10.

RS 110 RAVNEX is usually used for large moulds where high polishing is required (plastics and rubber, molds for automotive lighting).

RS 110 RAVNEX is used for plastic injection of interior parts as also for pressure die casting applications as holder material, prototypes.

RS GRADE AISI W.Nr. C Si Mn Cr Mo Ni

RS 110 RAVNEX ~P20+Ni Mod. 1.2738 Mod. HH ESR

0.26 <0.40 1.50 1.30 0.50 1.0

Chemical element content is in wt %

R S C H E M I C A L C O M P O S I T I O N ( % )

R S A P P L I C A T I O N

G E N E R A L C H A R A C T E R I S T I C S

500 ×

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RS 110 RAVNEX is supplied in pre-hardened condition at 310-355 HBW.

RS 110 RAVNEX is inspected in hardened and tempered condition. Microstructure is composed of fully homogenous tempered martensite. High purity and homogeneity of a steel with low level of sulfur give high polishing and photo-etching properties. The polishability additionally increases with increased hardness of a steel. RS 110 RAVNEX is delivered in ESR quality.

G E N E R A L C H A R A C T E R I S T I C S

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T O U G H N E S S

Q U A L I T A T I V E C O M P A R I S O N

Larger size moulds demand higher toughness to prevent unexpected gross cracking failure. Larger size moulds are recommended for particular grade.

Chart shows high polishability of RS 110 RAVNEX compared to standard and well known RS 103 and RS 105.

0

Excellent

Polishability

Good

Average

RS 103

RS 105

RS 110 RAVNEX

RS 200

RS 400

G E N E R A L C H A R A C T E R I S T I C S

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→ P H Y S I C A L P R O P E R T I E S ( T E M P E R A T U R E D E P E N D E N T )

D E N S I T Y (g /c m 3 )

7.80 (20 °C) * (400 °C) * (500 °C) * (550 °C) * (600 °C)

T H E R M A L C O N D U C T I V I T Y (W/(m.K))

33.20 (20 °C) 34.30 (100 °C) 33.40 (200 °C) 33.40 (300 °C) 31.60 (400 °C)

E L E C T R I C R E S I S T I V I T Y (O hm.mm 2/m)

0.19 (20 °C) * (400 °C) * (500 °C) * (550 °C) * (600 °C)

S P E C I F I C H E AT C A PA C I T Y ( J/(g .K))

0.46 (20 °C) * (400 °C) * (500 °C) * (550 °C) * (600 °C)

M O D U L U S O F E L A S T I C I T Y (10 3 xN/mm 2 )

205 (20 °C) * (400 °C) * (500 °C) * (550 °C) * (600 °C)

C O E F F I C I E N T O F L I N E A R T H E R M A L E X PA N S I O N (10 - 6 °C -1, 20 °C)*

11.7 (100 °C) 12.3 (200 °C) 13.0 (300 °C) 13.3 (400°C) 13.7 (500 °C)

P H Y S I C A L P R O P E R T I E S

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Higher compressive yield strength, RC0.2, of tool steel is needed to avoid or to minimize plastic deformation. Compressive yield strength in as-delivered condition is approx. 1150 N/mm2.

M E C H A N I C A L P R O P E R T I E S

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Austenitising temperature: 850 °C, soak time: 30 min.

Pre-hardened tool steels are machined without additional heat treatment, except where additional stress reliving is necessary.

1 10 1000100 10000 100000

100010010

10

1

1

Time in minutes

Time in hours

Time in seconds

Marks:A - AusteniteK - CarbideP - PerliteM - MartensiteB - Bainite

Tem

pera

ture

in (˚

C)

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

631 572 563 539 440 380

378

306

Ac₃ = 760 °C

A+K

Ms B+K

P +K

M+K

V� T = 0,078 °C/sV� T = 0,035 °C/sV� T = 0,020 °C/s

V� T = 0,92 °C/sV� T = 0,40 °C/s

V� T = 0,17 °C/s

V� T = 19,4 °C/s

V� T = 4,9 °C/s

Ac₁ = 722 °C

1

397

K - Carbide

90 30 5 2 110 70 94 93 59

5 40

Hardness HV₀,₁

20 % ..... structure composition

TIP 1 ←

C O N T I N I O U S C O O L I N G C U R V E S - C C T

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A N N E A L I N G

S T R E S S R E L I E V I N G

H A R D E N I N G

Recommendations.

Hardness after hardening is 52 HRC

HE AT ING ANNE AL ING T EMPER AT URE COOL ING

50 °C/h 710 - 740 °C 10 - 20 °C/h

Protect against oxidation, scaling and decarburisation. 2 hours. Slow in the furnace.

From 600 °C cooling in air is possible.

HE AT ING S T RE S S REL IE VING T EMPER AT URE COOL ING

100 °C/h 450-550 °C 20 °C/h

Protect against oxidationand decarburisation. 2 hours.

Slow and uniformly in the furnace to prevent formation of additional residual

stresses. Cooling in air is possible.

HE AT ING AUS T ENI T I S ING COOL ING

25 - 600 °C, 150-220 °C/h 600 - 840 °C, ≤150 °C/h 840 °C See CCT diagram

Hold in furnace at T = 600 °C until TSURFACE-TCORE ≤ 15 °C.

TSURFACE is measured at 15mm underneath surface, maximum soak time is 30 min.

If flame or induction hardening is used in pre-hardened condition slow cooling is necessary with immediate tempering.TIP 2 ←

H E A T T R E A T M E N T

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Tempering must start immediately after completion of quenching (when part reaches 90-70°C). Two tempering treatments are recommended. First tempering destabilizes retained austenite. Second tempering tempers newly formed microstructure constituents.

Tempering diagram

It is recommended to leave machining allowance before hardening of minimum 0.2 % of dimension, equal in all three directions.

HE AT ING T EMPERING T EMPER AT URE COOL ING

150 °C/h - 250 °C/h Min. 180 °CCool in air or in the furnace to room

temperature between tempering cycles.Protect against oxidation and decarburisation.

1 hour per 25 mm wall thickness based on the furnace temperature.

Minimum 2 hours.

If tool steel must be re-hardened, annealing should be done prior to hardening.TIP 3 ←

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T E M P E R I N G

D I M E N S I O N A L C H A N G E S D U R I N G H A R D E N I N G A N D T E M P E R I N G

Tempering temperature [°C], Time 1.5 h0 100 200 300 400 500 600 700

Hard

ness

in H

RC

40

55

50

60

45

35

30

65

70

H E A T T R E A T M E N T

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W E L D I N G

E L E C T R I C A L D I S C H A R G E M A C H I N I N G

RS 110 RAVNEX is a readily weldable alloy by TIG or MMA welding processes in hardened or soft-annealed condition. Weldability is better and safer than in the case of RS 103 because of lower carbon content. Filler metal should be of the same or similar composition.

Heat treatment after welding is recommended. Annealing should be perfor-med after welding of soft annealed parts, whereas tempering at temperature of about 50 °C below tempering temperature should be performed after welding of hardened and tempered parts. Laser welding is recommended for repair of smaller cracks and edges.

Electrical discharge machining (EDM) leaves a brittle surface layer due to melting and resolidification of surface material.

It is recommended to: (1) remove the resolidified layer by polishing, grinding or other mechanical methods, and (2) temper the work-piece at temperature of about 50 °C below the previous tempering temperature. Execution of tempering of re-hardened and yet untempered layer underneath the surface is critical.

P R E H E AT I N G T E M P E R AT U R E M A X I M U M I N T E R PA S S T E M P E R AT U R E P O S T W E L D C O O L I N G

~250 °C ~370 °C Approx. 30°C/h to not less than 70°C, then tempering.

W E L D I N G M E T H O D F I L L E R M AT E R I A L H A R D N E S S A F T E R W E L D I N G

TIG, MMA P20-Type ~ 320 HB

* Higher tempering temperatures are recommended for polishing or photo-etching.

W E L D I N G A N D E D M

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R E C O M E N D A T I O N S F O R M A C H I N I N G

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D R I L L I N G

F A C E M I L L I N G

T U R N I N G

The information below is provided solely as a general machining guideline. It refers to material in tempered condition.

I N S E R T D R I L L D I A M E T E R (mm)

C U T T I N G S P E E D (m/min)

F E E D (mm/rev)

Coated HSS 5 - 20 20 0.05 - 0.35

I N S E R T C U T T I N G S P E E D (m/min)

F E E D (mm/toot h)

D E P T H O F C U T (mm)

P20 c. (rough milling) 100 - 140 0.2 - 0.4 2.0 - 4.0

P10 c. (fine milling) 140 - 170 0.1 - 0.2 - 2.0

I N S E R T C U T T I N G S P E E D (m/min)

F E E D (mm/rev)

D E P T H O F C U T (mm)

P20 c. (rough turning) 100 - 150 0.20 - 0.4 2.0 - 4.0

P10 c. (fine turning) 150 - 200 0.05 - 0.2 - 2.0

HSS (fine turning) 15 0.05 - 0.3 - 2.0

* C - Coated carbide

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www.rsc.si

PL A STIC MOULD STEEL is produced by SIJ group | www.sij.si

• Metal Ravne | www.metalravne.com

• Acroni | www.acroni.si

PL A STIC MOULD STEEL is distributed by Ravne Steel | www.ravne steel.com

• Ravne Steel Center, Slovenia | www.rsc.si

• Sidertoce, Italy | www.sidertoce.com

• Ravne Steel Deutschland, Germany | www.ravnesteel.com