Heat Treatment Process Table for Machining: Common Materials and Techniques

The table below presents the heat treatment information for various types of steels commonly used in machining, such as stainless steel, carbon structural steel, carbon tool steel, alloy carburized steel, die steel, quenched and tempered steel, spring steel, nitrided steel, alloy cutting tool steel, and bearing steel.

The data includes details on annealing temperature, quenching temperature, martensite point, and tempering temperature.

Heat Treatment

Heat treatment chart for stainless steel

Steel typeStainless steel
Steel grade1Cr152Cr133Cr131Cr18Ni9Ti
4Cr13
Annealing temperature780 850780 850780 850820
Quenching temperature1020105010501050
Martensite point350350240 270
Tempering temperature ℃150Hardness after tempering HRC58
20041475257
25056
30040465155
35054
40039445054
45053
50038424950
55031374345
60024283440
65022243038

Heat treatment chart for carbon steel

Steel typeCarbon structural steelCarbon tool steel
Steel grade354550T8T12
40T7T10
Annealing temperature880 positive860 positive840 positive760770
Quenching temperature850840830780780
Martensite point350340320230210
Tempering temperature ℃150Hardness after tempering HRC5257586264
2005056576062
2504854545760
3004648515557
3504345465153
4003941434749
4503436384244
5003032343839
5502628303435
6002224252931
6501820212528

Heat treatment chart for alloy carbon steel

Steel typeAlloy carbon steel
Steel grade20Mn2TiB18CrNiw20Cr20Cr25CrNiW
18CrMnTi205iMnV1  30CrMnMoTi
Annealing temperature900 positive900 positive900 positive940 positive850
Quenching temperature860860880800850
Martensite point360310380 300
Tempering temperature ℃150Hardness after tempering HRC4445476350
2004244455948
2504143425645
3004042405443
3503941385340
4003940 5138
4503839 4936
5003637 4634
5503233  30
6002830  27
6502526  24

Heat treatment chart for die steel

Steel typeDie steel
Steel gradeCr12 type3Cr2W85CrMnMo8Cr3Cr9si2
  5CrNiMo7Cr3 
Annealing temperature860820850830800
Quenching temperature100010808508701070
Martensite point220360220220 
Tempering temperature ℃150Hardness after tempering HRC6352596262
2006149586061
2506048565960
3005948535859
3505847515658
4005846485354
4505744455050
5005645424747
5505348394543
6005045354139

Heat treatment chart for quenched and tempered steel

Steel typeQuenched and tempered steel
Steel grade30CrNi335CrMnSi37CrNiB40Cr45Cr
30CrMnNi2MoV30CrMnSi35CrMo50B45Mn2
Annealing temperature820860820840840
Quenching temperature860880860850850
Martensite point300360270320310
Tempering temperature ℃150Hardness after tempering HRC5154515456
2005053505154
2504851484853
3004648464751
3504446434649
4004244414348
4503941394246
5003538373844
5503235343440
6002728293135
6502527252528

Heat treatment chart for spring steel & nitrided steel

Steel typeSpring steelNitrided steel
Steel grade50CrV60Si2Mn65Mn38CrAl
55Si2Mn60Mn38CrMoAl
annealing temperature860810810950 positive
quenching temperature860860810940
Martensite point300300270360
Tempering temperature ℃150Hardness after tempering HRC57626157
20055595855
25053575653
30051555451
35048515048
40046484746
45043454343
50040413840
55036373436
60032333034
65030312630

Heat treatment chart for alloy cutting tool steel & bearing steel

Steel typeAlloy cutting tool steelBearing steel
Steel grade9CrsiCrMnSiMnGCr15GCr15SiMn
 CrWMnCrW5Cr20 
Annealing temperature800790800790790
Quenching temperature860840850850830
Martensite point170250240240200
Tempering temperature ℃150Hardness after tempering HRC6464656364
2006362636163
2506160615962
3005958595559
3505655565253
4005453544951
45051505145 
50048474841 
55044434436 
60040394028 
65036353626 

Heat treatment chart for spring steel

Steel type nameSpring steelNitrided steel
Steel grade50CrV60Si2Mn65Mn38CrAl
 55Si2Mn60Mn38CrMoAl
Annealing temperature860810810950 positive
Quenching temperature860860810940
Martensite point300300270360
Tempering temperature ℃150Hardness after tempering HRC57626157
20055595855
25053575653
30051555451
35048515048
40046484746
45043454343
50040413840
55036373436
60032333034
65030312630
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Shane
Author

Shane

Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

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