Knowledge Base

useful links
Comparison in gauge & mm
SWG MM
4 5.892
6 4.876
8 4.064
10 3.251
11 2.946
12 2.641
13 2.336
14 2.032
15 1.828
16 1.625
17 1.422
18 1.219
19 1.016
20 0.914
21 0.812
22 0.711
23 0.609
24 0.558
25 0.508
26 0.457
27 0.416
28 0.375
29 0.345
30 0.314
32 0.274
34 0.233
36 0.193
38 0.152
40 0.121
Conversion of British & U.S. units to Metric
Length

1 inch1)

in

0.025 40

m

1 foot1)

= 12 in

ft

0.304 80

m

1 yard

= 3 ft

yd

0.914 40

m

1 mile (statute)

= 1 760 yd

1.609 3

km

1 nautical mile

 

sm

1.853

km

1 mil

10-3 inch

 

25.4. 10-3

mm

1 microinch1)

10-6 inch

 

25.4. 10-6

mm

1 fathom

= 6ft

 

1.828 8

m

1) Specified by DIN 4890 for industrial usage. British and US units can be slightly different.

 
Area

1 square inch1)

1

sq in

6.451 6. 10-4

m2

1 circular inch (Brit.)

1

/4 sq in

5.067 107. 10-4

m2

1 square foot1)

1

sq ft

9.290 30. 10-2

m2

1 square yard1)

1

sq yd

0.836 127

m2

1 acre

1

1

4 046.85

m2

1 mile of land

= 640 acres

1

2.589 979

km2

1) based on 1 inch = 25.4 mm (DIN 4890)

Volume

1 cubic inch1)

 

cu in

16.387 1. 10-6

m3

1 cubic foot1)

 

cu ft

2.831 68. 10-2

m3

1 gallon (US) 4)

= 4 quarts = 8 pints

gal

3.785 43.10-3

m3

1 gallon (US) 3)

gal

4.41 . 10-3

m3

1 gallon (Brit.) 4)

= 4 quarts = 8 pints

gal

4.546 09. 10-3

m3

1 bushel (US) 3)

 

bu

3.523 9270. 10-2

m3

1 bushel (Brit.) 3)

= 8 gallons

bu

3.636 868 6. 10-2

m3

1 barrel (US) 3)

 

 

0.119 241 4

m3

1 barrel (petrol) (US) 4)

 

 

0.158 762 m3 or 0.163 5

m3

1 barrel (Brit.) 3)

 

 

0.163 656

m3

1 register ton 2)

= 100 cu ft

 

2.831 7

m3

1 Pint (Brit.) 4)

 

pt

5.682 29. 10-4

m3

1 pint (US) 4)

 

pt

4.731 7. 10-4

m3

1 quart (Brit.) 4)

 

qt

1.136 46. 10-3

m3

1 quart (US) 4)

 

qt

9.463 3. 10-4

m3

1) based on 1 inch = 25.4 mm (DIN 4890)

2) unit of volume

3) unit of capacity for dry substances

4) unit of capacity for liquids

 
Mass

1 pound (Av.)

 

lb

0.453 592 37

kg

1 hundredweight (Brit.)

= 112 lb

cwt

50.802 35

kg

1 (short) hundredweight (US)

= 100 lb

cwt

45.359 24

kg

1 long (gross) ton (Brit.)

= 2 240 lb

 

1 016.05

kg

1 short (net) ton (US)

= 2 000 lb

 

907.185

kg

1 ounce (Av.)

 

oz

0.028 349 5

kg

1 grain

 

gr

0.064 80. 10-3

kg

1 carat (metric)

 

 

0.2 . 10-3

kg

1 pennyweight

 

dwt

1.555 2. 10-3

kg

Av. = avoirdupois (commercial weight)

Inches and fractions of an inch - mm
inch mm
1/64 0.397
1/32 0.794
3/64 1.191
1/16 1.588
5/64 1.984
3/32 2.381
7/64 2.778
1/8 3.715
9/64 3.572
5/32 3.969
11/64 4.366
3/16 4.763
13/64 5.159
7/32 5.556
15/64 5.953
1/4 6.350
17/64 6.747
9/32 7.144
19/64 7.541
5/16 7.938
21/64 8.334
11/32 8.731
23/64 9.128
3/8 9.525
25/64 9.922
13/32 10.319
27/64 10.716
7/16 11.113
29/64 11.509
15/32 11.906
31/64 12.303
1/2 12.700
33/64 13.097
17/32 13.494
35/64 13.891
9/16 14.288
37/64 14.684
19/32 15.081
39/64 15.478
5/8 15.875
41/64 16.272
21/32 16.669
43/64 17.065
11/16 17.463
45/64 17.859
23/32 18.256
47/64 18.653
3/4 19.050
4/64 19.447
25/32 19.844
51/64 20.241
13/16 20.638
53/64 21.034
27/32 21.431
55/64 21.828
7/8 22.225
57/64 22.621
2/32 23.019
5/64 23.416
15/16 23.813
61/64 24.209
31/32 24.606
63/64 25.003
1 25.400
Weight table for sheet and plate
Thickness (mm) sq ft
0.500 0.365 gm
0.600 0.438 gm
0.700 0.512 gm
0.800 0.585 gm
0.900 0.657 gm
1.000 0.730 gm
1.200 0.876 gm
1.250 0.913 gm
1.500 1.100 kg
1.750 1.080 kg
1.800 1.320 kg
2.000 1.460 kg
2.200 1.610 kg
2.250 1.650 kg
2.500 1.830 kg
2.750 2.000 kg
2.800 2.050 kg
3.000 2.190 kg
3.500 2.560 kg
4.000 2.920 kg
4.500 3.280 kg
5.000 3.650 kg
5.500 4.010 kg
6.000 4.380 kg
6.500 4.740 kg
7.000 5.110 kg
7.500 5.470 kg
8.000 5.840 kg
9.000 6.570 kg
10.000 7.300 kg
11.000 8.050 kg
12.000 8.760 kg
13.000 9.530 kg
14.000 10.220 kg
15.000 10.950 kg
16.000 11.680 kg
20.000 14.600 kg
25.000 18.250 kg
30.000 22.000 kg
32.000 23.300 kg
35.000 25.500 kg
40.000 29.200 kg
45.000 32.900 kg
50.000 36.500 kg
60.000 44.000 kg
65.000 47.500 kg
70.000 51.000 kg
75.000 55.000 kg
80.000 59.000 kg
90.000 66.000 kg
100.000 73.000 kg
125.000 91.500 kg
Heat treatment

Grade

Hot Forming temperature

Hardening temperature
Quenchant
Obtainable Hardness Rockwell (C)
Tempering temperature
(C)
(C)
100 C
200 C
300 C
400 C
K-100
1000
-
1050
930
-
980
Oil, Hot bath
500-550c
64
63
62
59
57
K-105
1000
-
1059
1000
-
1050
Oil, Air or Hot bath
500-550c
63
63
61
58
58
H-13
1100
-
900
1020
-
1050
Oil, Air or Hot bath
500-550c
54
53
52
52
54
EN-31
1050
-
800
830
-
860
Oil or Hot bath
180-220c
64
64
61
56
50
0-1
1050
-
850
780
-
820
Oil or Hot bath
180-220c
64
64
62
57
53
2083
1100
-
1050
1000
-
1050
Oil or Salt bath
500-550c
56
56
55
52
51
P-20
1050
-
850
840
-
870
Oil or Salt bath
180-220c
51
51
50
48
46
1045
1050
-
800
800
-
830
Water
57
57
54
49
42
4140
1050
-
850
830
-
860
Oil
54
54
53
52
52
S-1
1050
-
850
870
-
900
Oil Hot bath
180-220c
60
60
58
56
52
1060
1050
-
800
800
770
--
830
800
Oil
Water
58
58
55
48
44
Survey of grades
Product Category Technical Name Product Name Product Description Usage of the Product
Special Steel Thyrodur 2080 D-3 High Carbon High Chromium Cold Work Tool Steel
Steel for cutting tool dies & punches blanking and punches tools wood working, Stone pressing deep drawing and extrusion, Shear Blades, Thread Rolling and plastic mould dies.
K-100
Thyrodur 2379 D-2 High Carbon High Chromium Wear Resistance, Toughness Cold Work Tool Steel
Steel for cutting tool dies & punches blanking and thread rolling dies, stamping tools for sheet up to 6mm, blanking dies up to 12mm, circular shear blades and highly wear resistant plastic moulds
K-105
Thyrodur 2510 0-1 Oil Hardening Cold Work Tool Steel
Steel for Pharmaceutical punches, machine knives, gauges, plastic mould, blanking and stamping dies, shear blades
K-460
Thyrotherm 2344 H-13 High Hot Tensile, Wear Resistance, Toughness Hot Work Tool Steel
Pressure die casting, metal extrusion, forging dies, moulds good polish, worms & cylinder for the processing of plastics
W-302
Thyroplast 2083 Corrosion Resistance Plastic Mould Steel
Moulds for processing plastic with corrosive action
Thyrapid 3343 M2 High Speed Tool Steel
For all metal cutting tool for roughing or finishing, such as twist drills, milling cutters of all types, taps, cutting tools, reamers, chasers, shaping tools and wood working tools
Thyrodur 2550 SI Shock resistance Tool Steel
Steel for Pharmaceutical Punches, blanking dies for cutting sheet metals up to 12mm thickness
Silver Steel Tool Steel
For ejector & other allied pins
AISI 304 Stainless Steel
General engineering
Alloy Steel Thyrodur 2067 EN-31 Oil Hardening Cold Work Bearing, Alloy Steel
Steel for bearing, pharmaceutical punches, guide pillar & bushes for dies & moulds low strength cutting dies
Thyroplast 2311 P-20 Light Hardened Plastic Mould Steel
Plastic moulds for good polishing and pressure casting dies
AISI 4140 High Tensile Alloy Steel
High Tensile bolts gears and crank shaft
AISI 8620 Case Hardening Alloy Steel
Components with large cross sections requiring high toughness and core strength such as gears, crank shafts and heavy duty for gear air craft and truck construction & mechanical engineering
Carbon Steel Thyrodur 1730 AISI 1045 Water Hardening Carbon Steel
Low tensile steel for automotive and general engineering, also used in mould frames
Thyrordur 1740 1060 Water Hardening High Carbon Steel
Steel for general engineering and for moulds