Alro - Tool Steel Bar

DeCarb Free Tool Steel Bar
S-5

Description

A tough, oil-hardening silicon-manganese of medium carbon content especially adapted for punches, shear blades, chisels, and other shock resisting applications. S-5 is therefore applicable where the properties of silicon-manganese steels are desired in combination with well known advantages of oil hardening steels. A reduced tendency to distort, or crack in heat treatment is accordingly combined with high toughness in S-5.

Chemical Composition

Typical Analysis	Type S-5 (UNS T41905)
Carbon (C) :	.50/.65
Manganese (Mn) :	.60/1.00
Silicon (Si) :	1.75/2.25
Tungsten ((W)
Molybdenum (Mo) :	.20/1.35
Chromium (Cr) :	.35 max
Vanadium (V) :	.35 max
Cobalt (Co) :

FORGING (a)
Start forging at	1850-2050°F (1010-1121°C)
Do not forge below	1600°F (871°C)

NORMALIZING (b)	Do not normalize

ANNEALING (c)
Temperature	1425-1475°F (774-802°C)
Rate of cooling, max per hour	25°F (14°C)
Typical annealed hardness, Brinell	192-229

HARDENING
Rate of heating	Slowly
Preheat temperature	1400°F (760°C)
Hardening temperature	1600-1700°F (871-927°C)
Time at temperature, minutes	5-20
Quenching medium	O(l)

TEMPERING
Tempering Temperature	350-800°F (177-427°C)
Approx. tempered hardness, Rockwell C	50-60

WEAR RESISTANCE	Low to Medium
TOUGHNESS	Highest
RESISTANCE TO SOFTENING EFFECT OF ELEVATED TEMPERATURE	Low
DEPTH OF HARDENING	High
MACHINABILITY	Medium to High
GRINDABILITY	Medium to High
DISTORTION IN HEAT TREATING	Medium
SAFETY IN HARDENING	High
RESISTANCE TO DECARBURIZATION	Low