Tool Steel Guide

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A2 Tool Steel

An air-hardening, cold work medium alloy tool steel grade containing 5% chromium, A2 is preferable to O1 in applications requiring greater size stability, machinability and safer hardening. Its toughness and wearability make it particularly useful in longer production runs on either light or heavy gauge stock. Applications include: blanking dies, forming dies, trimming dies, stamping dies, coining dies, drawing dies, extrusion dies, punches, shear and slitter blades, gauges, knurling tools, rolls, mandrels and machine parts.

Typical Analysis:

Carbon
.90/1.05
Sulfur
.005 max
Phosphorus
.025 max
Molybdenum
.90/1.10
Chromium
4.90/5.30
Silicon
.20/.35
Vanadium
.15/.20
Manganese
.40/.60
Temp. °F
Normalizing
no
Annealing 1550-1600
Hardening 1700-1800
Tempering 350-1000
Rockwell C
57-62
Tempering Data
Temper °F Rockwell C
400 60-62
500 59-61
600 58-60
700 57-59
800 56-58
1000 54-56
1100 48-50














D2 Tool Steel

An air-hardening, cold work high carbon, high chrome tool steel. Its superior machinability and excellent wear resistance make it ideal for long production runs. Highest stability after heat treating of all cold work tool steel grades, D2 is deep hardening and its toughness allows it to resist cracking and chipping. Applications include: knife blades, thread rolling dies, lamination dies, blanking dies, forming dies, trimming dies, stamping dies, coining dies, drawing dies, extrusion dies, punches, shear and slitter blades, gauges, knurling tools, rolls, mandrels and machine parts.

Typical Analysis:

Carbon
1.50/1.60
Sulfur
.015 max
Phosphorus
.025 max
Molybdenum
.70/.80
Chromium
11.5/12.0
Silicon
.20/.60
Vanadium
.80/1.00
Manganese
.20/.40
Temp. °F
Normalizing
no
Annealing 1600-1650
Hardening 1800-1875
Tempering 400-1000
Rockwell C
54-61
Tempering Data
Temper °F Rockwell C
400 60-62
500 58-60
600 57-59
700 57-59
800 56-58
1000 54-56
1100 48-50














H13 Tool Steel

An air-hardening, hot work 5% chrome tool steel. H13 combines excellent shock and abrasion resistance with good red hardness making it ideal for use in die casting. Most commonly used in plastic molds and die casting, its ability to withstand rapid cooling from high working temperatures also make it a prime choice for use in extrusion dies. While designed to be a versatile hot work grade, H13 tool steel has been useful in cold work applications as well, particularly when extra toughness is desired but wear resistance is not important. Other applications include: trimming dies, extrusion dies, forging dies, die casting, forming punches, hot shear blades and mold dies.

Typical Analysis:

Carbon
.35/.45
Sulfur
.030 max
Phosphorus
.030 max
Molybdenum
1.10/1.75
Chromium
4.75/5.50
Silicon
.80/1.20
Vanadium
.80/1.20
Manganese
.20/.50
Temp. °F
Normalizing
no
Annealing 1550-1650
Hardening 1825-1900
Tempering 1000-1200
Rockwell C
38-53
Tempering Data
Temper °F Rockwell C
1000 48-50
1050 50-52
1100 47-49
1150 46-48
1200 43-45














O1 Tool Steel

An oil-hardening, cold work general purpose tool steel with easy machining properties and low hardening temperatures compared to other grades. O1 provides good wear resistance and toughness sufficient for standard tool and die applications. In situations that require greater size stability during hardening, A2 tool steel should be considered. Some common applications include: bending dies, trimmer dies, perforators, broaches, blanking dies, forming dies, gages, cutting dies, bushings, forming rolls, drawing dies, and embossing dies.

Typical Analysis:

Carbon
.90/1.00
Sulfur
.030 max
Phosphorus
.030 max
Tungsten
.40/.60
Chromium
.40/.50
Silicon
.40/.50
Vanadium
.15/.30
Manganese
1.00/1.20
Temp. °F
Normalizing
1600
Annealing 1400-1450
Hardening 1450-1500
Tempering 300-1000
Rockwell C
44-64
Tempering Data
Temper °F Rockwell C
300 62-64
400 60-62
500 57-59
600 55-57
700 52-55
800 48-51
1000 44-48














M2 Tool Steel

The most commonly used grade of the high speed tool steel category, M2 is a molybdenum-tungsten grade with excellent red hardness, wear resistance and toughness. M2 tool steel is generally suitable for use in applications specified for T1 high speed steel. Some applications include: drill bits, reamers, taps, gear cutters, lathe tools, broaches, boring tools, forming rolls, inserts, punches, milling cutters and end mills.

Typical Analysis:

Carbon
.85/.95
Sulfur
.030 max
Phosphorus
.030 max
Molybdenum
5.00
Tungsten
5.50/6.50
Chromium
4.00
Silicon
.20/.40
Vanadium
2.00
Manganese
.30
Temp. °F
Normalizing
no
Annealing 1600-1650
Hardening 2175-2250
Tempering 1000-1150
Rockwell C
60-66
Tempering Data
Temper °F Rockwell C
1000 64-66
1050 64-65
1100 62-64
1150 60-62














M42 Tool Steel

M42 is a molybdenum high speed tool steel with 8-10% cobalt added for increased hardness and hot hardness that is superior to other high speed grades and can obtain a hardness of up to 70 Rc. This results in a sharper cutting edge that lasts longer, even when being used to machine high-hardness and hard-to-machine alloys in heavy duty and high production applications.

Typical Analysis:

Carbon
1.10
Cobalt
8.00/10.00
Nickel
.30 max
Molybdenum
9.00/10.00
Tungsten
1.50
Chromium
3.50/4.25
Silicon
.15/.65
Vanadium
.95/1.35
Manganese
.15/.35
Temp. °F
Normalizing
no
Annealing 1600-1650
Hardening 2125-2175
Tempering 950-1100
Rockwell C
65-70
Tempering Data
Temper °F Rockwell C
1000 68-70
1050 66-68
1100 63-65
1150 60-62














S7 Tool Steel

A shock resisting tool steel grade with superior impact properties combined with high toughness, machinability and size stability during heat treating. Air hardening and versatile enough for use in both cold and hot work tooling make S7 tool steel suitable for a wide range of applications that require shock resistance, size stability and machinability where temperatures of the tool will not exceed 1000°F. Typical applications include: plastic molding dies, riveting diesk, forming dies, chisels, punches, blanking dies, die casting, master hobs, shear blades, engraving dies, moll points, drills, notching dies, bending dies.

Typical Analysis:

Carbon
.45/.55
Sulfur
.030 max
Phosphorus
.025 max
Molybdenum
1.30/1.60
Chromium
3.10/3.40
Silicon
.20/.40
Vanadium
.20/.30
Manganese
.50/.70
Temp. °F
Normalizing
no
Annealing 1500-1550
Hardening 1700-1750
Tempering 400-1200
Rockwell C
40-58
Tempering Data
Temper °F Rockwell C
400 56-58
500 54-56
600 53-55
700 52-54
800 52-54
900 51-53
1000 49-52
1100 46-48
1200 40-42














A6 Tool Steel

An air-hardening, cold work tool steel that combines the advantages of a low hardening temperature range similar to that of oil hardening grades along with deeper hardening properties comparable to air hardening grades. A6 tool steel experiences minimal distortion compared to other air hardening grades or the oil hardening grades. Typical applications include: forming dies, blanking dies, punches, tools, shear blades, spindles, coining dies, gages, mandrels.

Typical Analysis:

Carbon
.65/.75
Sulfur
.030 max
Phosphorus
.030 max
Molybdenum
.90/1.40
Chromium
.90/1.20
Silicon
.50
Manganese
1.80/2.50
Temp. °F
Normalizing
no
Annealing 1350-1375
Hardening 1525-1600
Tempering 300-800
Rockwell C
51-60
Tempering Data
Temper °F Rockwell C
300 59-60
400 57-59
500 56-57
600 55-56
700 52-54
800 51-53














Values shown are considered typical and for informational purposes only. Actual material values may deviate from those values shown.