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S-5

S-5 Shock Resisting Tool Steel

S-5 is a silicon-manganese tool steel which exhibits the highest impact toughness among all of the “S” type steels. The high toughness and the ability to be hardened to 62 Rockwell C make S-5 an excellent choice for applications which require higher strength than S-7 shock-resisting tool steel.

Analysis:


C

CO

CR

MN

MO

NI

P

S

SI

V

W
0.50 – 0.650.10 – 0.500.60 – 1.000.20 – 1.351.75 – 2.250.15 – 0.35

Size Availability:

Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard

Applications:

Brake DiesColletsDrift Pins
Hand ChiselsKnockout PinsPipe Cutters
Pneumatic ToolsPunchesRivet Sets
Shear BladesSlittersSwaging Dies

Designations:

AISI S5 Tool Steel-US
ASTM A681-US
FED QQ-T-570-US
SAE J437-US
SAE J438-US
UNS T41905-US

TreatmentTemperature RangeCooling/QuenchingNotes
Forging1825-1925° FSlow.Cool slowly in furnace or in other insulating media.
Annealing1450-1500° FCool slowly at a rate of 25° F per hour to 1000° F.Hold at temperature for 2 hours.
Stress Relieving1000-1250° FCool slowlyStress relieve after rough machining
Preheating1200-1250° FPreheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible.
Hardening1575-1650° F (water)

1600-1700° F (oil)

In water.

In oil.

Allow to cool to 125-150° F before tempering. Soak time is 10 minutes per inch of thickness. Minimum of 30 minutes. Oil quenching is preferred for intricate parts.
Tempering(See Chart)Temper immediately after hardening and quenching. For maximum hardness temper at 300-350° F. For maximum toughness temper at 900-1000° F.
Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.

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