ALTA S5 Tool Steel Properties

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Cold work tool steel

ALTA S5 Tool Steel Specification

Steel properties

ALTA S5 steel is a Shock-Resisting Tool Steel 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 S5 an excellent choice for applications that require higher strength than S7 shock-resisting tool steel.

Applications

² Different cutting parts, chisels, rivet sets, punches, driver bits

² Pneumatic tools, hammers, stamps, brake dies, shear blade, drift pins, slitters, collets

Chemical composition

Chemical Composition per %

	C	Si	Mn	P	S	Cr	Mo	V	Ni	Cu
Min.	0.50	1.80	0.60			0.10	0.30	0.15
Max.	0.60	2.20	0.90	0.025	0.010	0.50	0.50	0.35	0.25	0.30

Basic melting process :

IM/EAF + LF + VD + (ESR)

Hardness :	Max 229 HB (annealed)
Reduction ratio :	5 : 1 minimum or required
Grain size :	≥ 6.0 per ASTM E112
Non-metallic inclusion :	≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)
Ultrasonic Test	SEP1921, EN 10308, ASTM A388 or agreed methods
Macro-structure	As per ASTM E381
Straightness / flatness	≤ 1.5 mm / m (machined), ≤ 2.5 mm / m (black)
Tolerance	Per discussed
Size range (round bars)	Ø 12 - 500 mm
Size range (flats, plates)	12 - 500 mm in thickness max. 1100 mm in width

Heat treatment

Annealing	Temperature(°C)	Hardness
Annealing	760 - 790	max. 229 HB

Hot-forming	Temperature(°C)
	980 - 1070

Hardening and tempering	Quenching temperature(°C)	Quenching medium	Frequently-used tempering temperature(°C)
Hardening and tempering	770 - 840	Oil	150 - 340

Ac1	Ac3	Ar1	Ms
770	838	739	197

Downloads

2024-06-12 Alta S5 SPEC (011 - S6 - T1 ).pdf

57 603.78 KB

Product images

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Features

² Good toughness

² High strength

2024-06-12 Alta S5 SPEC (011 - S6 - T1 ).pdf