Material

Carbon Steel

  • Good resistance to wear
  • Magnetic

Material Property Class
Low Carbon Steel 1008/ SWRCH 6A, 8A 6.8
1018/ 1022 Hardened Self-tapping Screw
10B21 8.8
Medium Carbon Steel 1035/ 1045 10.9
35ACR/ 40ACR 10.9
10B33 10.9
Alloy Steel SCM435 12.9

Stainless Steel

  • Great corrosion resistance
  • Non-magnetic for austenitic stainless steel

Material Class
Stainless Steel SUS 302/ SUS 302HQ
SUS 304 A2
SUS 316 A4
SUS 410 (Magnetizable and can be strengthened by hardening) C1
SUS 416 (Magnetizable and can be strengthened by hardening) C4
SUS 430 (Magnetizable and can be strengthened by hardening) F1

Aluminum

  • Light weight (around one-third of steel weight)
  • Non-magnetic
  • Resistance to wear and corrosion can be significantly improved through electroplating
  • Great thermal conductivity (around two-third of copper’s thermal conductivity)
  • Tensile strength of aluminum is between 13,000 psi (90 MPa) for pure aluminum up to 60,000 psi (414 MPa)

Copper/ Brass

  • Great corrosion resistance
  • Superior thermal conductivity
  • Tensile strength of pure copper is about 30,000 psi (207 MPa)
  • Tensile strength of brass is about 65,0000 psi (448 MPa)

MECHANICAL PROPERTIRES OF BOLTS, SCREW AND STUDS (ACCORDING TO ISO 898-1)
Mechanical properties 3.6 4.6 4.8 5.6 5.8 6.8 8.8 8.8 9.8 10.9 12.9
d≤16 mm d>16 mm
Tensile strength N/mm2 (kgf/mm2) nom 300 400 500 600 800 800 900 1000 1200
min. 330 400 420 500 520 600 800 830 900 1040 1220
(33.7) (40.8) (42.8) (51.0) (53.0) (61.2) (81.6) (84.6) (91.8) (106.0) (124.0)
Vickers Hardness min. 95 120 130 155 160 190 250 255 290 320 385
max. 250 320 335 360 380 435
Brinell hardness min. 90 114 124 147 152 181 238 242 276 304 366
max. 238 304 318 342 361 414
Rockwell hardness HRB min. 99.5 -
max. 52 67 71 79 82 89 -
HRC min. - 22 23 28 32 39
max. - 32 34 37 39 44
Surface Hardness HV max. - Should not be more than 30 Vickers points above the measured core hardness
Lower Yield stress, N/mm2 (kgf/mm2) nom. 180 240 320 300 400 480 -
min. 190 240 340 300 420 480 -
(19.4) (24.5) (34.7) (30.6) (42.8) (48.9)
Proof stress, N/mm2 (kgf/mm2) nom. - 640 640 720 900 1080
min. - 640 (65.3) 660 (67.3) 720 (73.4) 940 (95.9) 1100 (112)
Stress under proofing load stress ratio 0.94 0.94 0.91 0.93 0.90 0.92 0.91 0.91 0.90 0.88 0.88
N/mm2 (kgf/mm2) 180 (18.4) 225 (22.9) 310 (31.6) 280 (28.6) 380 (38.7) 440 (44.9) 580 (59.1) 600 (61.2) 650 (66.3) 830 (84.6) 970 (98.9)
Elongation after fracture (%) min. 25 22 14 20 10 8 12 12 10 9 8


Low Carbon Steel (chemical composition)
SAE/ANSI C

(%)
Mn

(%)
P

(%)
S

(%)
Si

(%)
B

(%)
Al

(%)
1008 ≤0.06 ≤0.35 0.040 0.050 - - -
1018 0.15-0.20 0.60-0.90 0.040 0.050 - -
1022 0.18-0.23 0.70-1.00 0.040 0.050 - -
Medium Carbon Steel (chemical composition)
SAE/ANSI C

(%)
Mn

(%)
P

(%)
S

(%)
Si

(%)
B

(%)
Al

(%)
1045 0.43-0.50 0.60-0.90 0.040 0.050 - -
SWRCH 16A 0.13-0.18 0.60-0.90 ≤0.030 ≤0.035 ≤0.10 - ≥0.02
SWRCH 18A 0.15-0.20 0.60-0.90 ≤0.030 ≤0.035 ≤0.10 - ≥0.02
10B21 0.18-0.23 0.70-1.00 ≤0.030 ≤0.035 ≤0.10 ≥0.0005 -
10B33 0.32-0.36 0.70-1.00 ≤0.030 ≤0.035 0.15-0.35 ≥0.0005 -

For reference only



Stainless Steel (chemical composition)
SAE/ANSI C

(%)
Mn

(%)
P

(%)
S

(%)
Si

(%)
Cr

(%)
Ni

(%)
Mo

(%)
SUS 302 0.15 200 0.045 0.030 1.00 17.00-19.00 8.00-10.00 -
SUS 304 0.08 2.00 0.030 0.15 1.00 17.00-19.00 8.00-10.00 -
SUS 304L 0.03 2.00 0.045 0.030 1.00 18.00-20.00 8.00-12.00 -
SUS 316

SUS 316L
0.08

0.03
2.00

2.00
0.045

0.045
0.030

0.030
1.00

1.00
16.00-18.00

16.00-18.00
10.00-14.00

10.00-14.00
2.00-3.00

2.00-3.00
SUS 430 0.12 1.00 0.040 0.030 1.00 14.00-18.00 - -
SUS 430F 0.12 1.25 0.060 ≥0.15 1.00 14.00-18.00 - ≤0.60

For reference only