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You are in: HOME > Technical Information > Mechanical Property and Chemical Requirements (Composition) > DIN EN ISO 898-1 Mechanical Properties of Fasteners Part 1: Bolts, Screws and studs (ISO 898-1:1999) |
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EN ISO 898-1 Table 2 - Steels (Limits of Chemical Composition, %)
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Property class
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Material and treatment
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C
max. min
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P
max.
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S
max.
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B
max.
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Tempering
℃ min.
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Carbon Steel
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3.6
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0.20
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0.050
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0.060
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0.0030
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4.6
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0.55
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0.050
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0.060
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0.0030
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4.8
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5.6
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0.13
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0.55
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0.050
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0.060
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0.0030
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5.8
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0.55
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0.050
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0.060
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6.8
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8.8
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Carbon steel ith additives (e.g. B,Mn or Cr)
quenched and tempered
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0.15
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0.40
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0.035
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0.035
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0.0030
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425
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Carbon steel quenched and tempered
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0.25
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0.55
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0.035
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0.035
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9.8
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Carbon steel with additives (e.g. B,Mn or Cr)
quenched and tempered
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0.15
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0.35
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0.035
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0.035
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0.0030
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425
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Carbon steel quenched and tempered
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0.25
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0.55
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0.035
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0.035
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10.9
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Carbon steel with additives (e.g. B,Mn or Cr)
quenched and tempered
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0.15
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0.35
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0.035
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0.035
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0.0030
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340
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10.9
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Carbon steel quenched and tempered
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0.25
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0.55
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0.035
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0.035
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0.0030
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425
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Carbon steel with additives (e.g. B,Mn or Cr)
quenched and tempered
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0.20
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0.55
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0.035
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0.035
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alloy steel quenched and tempered
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0.20
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0.55
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0.035
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0.035
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12.9
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alloy steel quenched and tempered
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0.28
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0.50
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0.035
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0.035
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0.0003
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380
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| EN ISO 898-1 Table 3 - Mechanical and Physical Properties of Bolts, Screws and Studs |
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Sub-clause number
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Mechanical and physical property
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3.6
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4.6
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4.8
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5.6
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5.8
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6.8
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8.8
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9.8
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10.9
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12.9
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d ≤ 16mm
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d>16mm
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5.1
5.2
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| Tensile strength Rm N/mm2 |
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nom.
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300
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400
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500
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600
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800
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800
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900
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1000
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1200
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min.
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330
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400
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420
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500
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520
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600
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800
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830
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900
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1040
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1220
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5.3
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Vickers hardness,HVF
F ≥ 98N |
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min.
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95
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120
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130
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155
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160
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190
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250
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255
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290
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320
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385
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max
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220
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250
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320
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335
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360
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380
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435
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5.4
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| Brinell hardness, HB F = 30 D2 |
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min.
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90
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114
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124
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147
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152
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181
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238
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242
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276
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304
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366
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max
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209
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238
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304
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318
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342
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361
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414
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5.5
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Rockwell hardness, HR
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min. HRB
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52
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67
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71
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79
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82
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89
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HRC
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22
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23
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28
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32
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39
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max. HRB
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95
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99.5
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HRC
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32
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34
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37
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39
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44
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5.6
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Surface hardness,
HV 0.3
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max
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5.7
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| Lower yield stress R el , N/mm2 |
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nom
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180
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240
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320
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300
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400
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480
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min
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190
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240
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340
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300
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420
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480
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5.8
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| Stress at 0.2%non-proportial elongation Rp0.2 , N/mm2 |
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nom
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640
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640
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720
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900
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1080
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min
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640
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660
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720
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940
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1100
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5.9
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| stress under proof load Sp |
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Sp/Rel or Sp/Rp0.2
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0.94
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0.94
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0.91
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0.93
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0.92
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0.91
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0.91
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0.9
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0.88
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0.88
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N/mm2
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180
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225
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310
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280
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380
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440
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580
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600
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650
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830
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970
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5.10
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Breaking torque, MB
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Nm min.
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See ISO 898-7
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5.11
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Percent elongation after fracture A min
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25
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22
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20
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12
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12
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10
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9
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8
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5.12
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reduction area after fracture, Z % min.
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52
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48
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48
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44
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5.13
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strength under wedge loading
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The values for full size bolts and screws (not studs) shall not be smaller
than the min. values for tensile strength shown in 5.2
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5.14
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Impact strength, KU
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J min.
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25
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30
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30
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25
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20
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15
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5.15
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Head soundness
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No fraction
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5.16
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Minimun height of non-decarburized thread zone, E
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1/2 H1
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2/3 H1
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3/4 H1
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5.17
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Hardness after retempeing
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Reduction of hardness 20 HV maximun
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5.18
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Surface integrity
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In accordance with ISO 6157-3 as appropriate
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