DATA

Innovation & Challenge IMA inc

DATA ROOM

Perfect quality without a single defective product.

Hex Head Bolts

– Material : Ti, Zr, Inconel, Hac276, Ni, Mo

   B 1002

   B 1180

   B18,2,1

   931

   933

   601

   3692

   4190

   1768

   1768


Milli Bolt

Unit : ㎜
d d1 H B C R S Pitch
Screw Name Basic
Dimensions
Tolerance Basic
Dimensions
Tolerance Basic
Dimensions
Tolerance Normal Particular
Level A Level B Standard Level A Level B Standard Level A Level B Standard
M6 6 0 +0.6 4 10 0 0 0 11.5 0.25 18 1
-0.1 0 -0.15 ±0.15 ±0.25 ±0.6 -0.2 -0.6 -0.6
M8 8 0 -0.2 5.5 13 0 0 0 15 0.4 22 1.25 1
M10 10 -0.15 +0.7 7 17 -0.25 -0.7 0.7 19.6 0.4 26 1.5 1.25
M12 12 -0.2 8 19 21.9 0.6 30 1.75 1.25
M14 14 0 9 ±0.3 ±0.8 22 0 0 0 25.4 0.6 34 2 1.5
M16 16 -0.25 +0.9 10 24 -0.35 -0.8 -0.8 27.7 0.6 38 2 1.5
M18 18 -0.2 12 27 31.2 0.6 42 2.5 1.5
M20 20 -0.2 13 ±0.2 30 34.6 0.8 46 2.5 1.5
M22 22 14 32 37 0.8 50 2.5 1.5
M24 24 0 +0.95 15 36 41.6 0.8 54 3 2
M27 27 -0.35 -0.35 17 ±0.35 ±0.9 41 0 0 47.3 1 60 3 2
M30 30 19 46 -0.4 -1.0 -1.0 53.1 1 66 3.5 2
M33 0 +1.2 +1.2 ±0.25 ±0.4 ±1.0
33 -0.4 -0.4 -0.4 21 50 57.7 1 72 3.5 2.2

Inch Bolt

Unit : inch
d d1 B C H R
Basic Max. Basic Max. Min. Max. Min. Basic Max. Min. Max. Min.
1/4 0.2500 0.260 7/16 0.438 0.425 0.505 0.484 11/64 0.188 0.150 0.03 0.01
5/16 0.3125 0.324 1/2 0.500 0.484 0.577 0.552 7/32 0.235 0.195 0.03 0.01
3/8 0.3750 0.388 9/16 0.562 0.544 0.650 0.620 1/4 0.268 0.226 0.03 0.01
7/16 0.4375 0.452 5/8 0.625 0.603 0.722 0.687 19/64 0.316 0.272 0.03 0.01
1/2 0.5000 0.515 3/4 0.750 0.725 0.866 0.826 11/32 0.364 0.302 0.03 0.01
5/8 0.6250 0.642 15/16 0.938 0.906 1.083 1.033 27/64 0.444 0.378 0.06 0.02
3/4 0.7500 0.768 1-1/8 1.125 1.088 1.299 1.240 1/2 0.524 0.455 0.06 0.02
7/8 0.8750 0.895 1-5/16 1.312 1.269 1.516 1.477 37/64 0.604 0.531 0.06 0.02
1 1.0000 1.022 1-1/2 1.500 1.450 1.732 1.653 43/64 0.700 0.591 0.09 0.03
1-1/8 1.1250 1.149 1-11/16 1.688 1.631 1.949 1.859 3/4 0.870 0.658 0.09 0.03
1-1/4 1.2500 1.277 1-7/8 1.875 1.812 2.165 2.066 27/32 0.876 0.749 0.09 0.03
1-3/8 1.3750 1.404 2-1/16 2.062 1.994 2.382 2.273 29/32 0.940 0.810 0.09 0.03
1-1/2 1.5000 1.531 2-1/4 2.250 2.175 2.598 2.480 1 1.036 0.902 0.09 0.03

Bolt Wrench

   B 1003
   B 1176
   912
   7934
   B 183

Unit : inch
Basic Spec. (d) M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33
Pitch 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 3.5
d1 Basic 3 4 5 6 8 10 12 14 16 18 20 22 24 27 30 33
Tolerance 0 / -0.1 0 / -0.15 0 / -0.2
D Basic 5.5 7 8.5 10 13 16 18 21 24 27 30 33 36 40 45 50
Tolerance 0 / -0.3 0 / -0.36 0 / -0.43
H Basic 3 4 5 6 8 10 12 14 16 18 20 22 24 27 30 33
Tolerance 0 / -0.25 0 / -0.3 0 / -0.36 0 / -0.52 0 / -0.62
B Basic 2.5 3 4 5 6 8 10 12 14 14 17 17 19 19 22 24
Tolerance -0.080 / 0.020 -0.106 / -0.030 -0.130 / -0.040 -0.230 / -0.060 -0.275 / -0.065
C 2.9 3.6 4.7 5.9 7 9.4 11.7 14 16.3 16.3 19.8 19.8 22.1 22.1 25.6 27.9
m Min. 1.6 2.2 2.5 3 4 5 6 7 8 9 10 11 12 13.5 15 16.5
R Min. 0.1 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.6 0.8 0.8 0.8 1 1 1
da Max. 3.6 4.7 5.7 6.8 9.2 11.2 14.2 16.2 18.2 20.2 22.4 24.4 26.4 30.4 33.4 36.4
k 0.6 0.8 0.9 1 1.2 1.5 2 2 2 2.5 2.5 2.5 3 3 3.5 3.5
a-b Max. 0.2 0.2 0.3 0.3 0.4 0.5 0.7 0.7 0.8 0.9 0.9 1.1 1.2 1.3 1.5 1.6
S L ≤ 120 12 14 16 18 22 26 30 34 38 42 46 50 54 60 66 72
120 < L ≤ 200 40 44 48 52 56 60 66 75 78
L > 200 73 79 85 91

Milli Nuts

   B 1002
   B 1180
   B18,2,1
   555
   934
   3692
   3692
   4190
   1768
   1769

Unit : ㎜
Spec. H H1 B C D D1 Small Edge
Basic
Dimensions
Tolerance Basic
Dimensions
Tolerance Basic
Dimensions
Tolerance Min. Basic
Level A Level B Standard Level A Level B Standard Level A Level B
M3×0.5 2.4 0 1.8 5.5 6.4 5.3
.(M3.5) 2.8 -0.25 2 0 6 6.9 5.8
M4×0.7 3.2 2.4 -0.25 7 0 8.1 6.8
.(M4.5) 3.6 2.8 9.2 7.8
M5×0.8 4 0 3.2 -0.2 7.2
M6 5 -0.3 0 ±0.6 3.6 10 0-0.6 11.5 9.8 9
.(M7) 5.5 -0.48 ±0.6 4.2 0 0 ±0.6 11 0 0 12.7 10.8 10
M8 6.5 5 -0.3 -0.48 13 -0.25 0.7 15 12.5 11.7 12
M10 8 0 0 ±0.8 6 17 19.6 16.5 15.8 14
M12 10 -0.36 -0.58 7 19 21.9 18 17.6 17
(M14) 11 8 0 0 ±0.8 22 25.4 21 20.4 19
M16 13 10 -0.36 -0.58 24 0 0 27.7 23 22.3 22
(M18) 15 0 0 ±0.9 11 27 -0.35 -0.8 31.2 26 25.6 24
M20 16 -0.43 -0.79 12 30 34.6 29 28.5 27
(M22) 18 13 0 0 ±0.9 32 37 31 30.4 30
M24 19 14 -0.43 -0.7 36 0 0 41.6 34 34.2 32
.(M27) 22 16 41 -0.41 -1 47.3 39 36
M30 24 0 18 46 53.1 44 41
.(M33) 26 -0.52 -0.84 ±1 20 0 0 50 0 0 57.7 48 46
M36 29 21 -0.82 -0.84 ±1.0 55 -0.45 -1.2 63.5 53 50

Inch Nut

   B 1002
   B 1181
   B18,2,1
   555
   934
   4190
   1768
   1769

Unit : inch
Spec. B C H H1
Basic
Dimensions
Basic Max. Min. Max. Min. Basic Max. Min. Basic Max. Min.
1/4 0.2500 7/16 0.438 0.428 0.505 0.488 7/32 0.226 0.212 5/32 0.164 0.150
5/16 0.3125 2/1 0.500 0.489 0.577 0.557 17/64 0.273 0.258 3/16 0.195 0.180
3/8 0.3750 9/16 0.562 0.551 0.650 0.628 21/64 0.337 0.320 7/32 0.227 0.210
7/16 0.4375 11/16 0.688 0.675 0.794 0.768 3/8 0.385 0.365 1/4 0.260 0.240
1/2 0.5000 3/4 0.750 0.736 0.866 0.840 7/16 0.448 0.427 5/16 0.323 0.302
9/16 0.5625 7/8 0.875 0.861 1.010 0.982 31/64 0.496 0.473 5/16 0.324 0.301
5/8 0.6250 15/16 0.938 0.922 1.083 1.051 35/64 0.496 0.473 5/16 0.324 0.301
3/4 0.7500 1-1/8 1.125 1.088 1.299 1.240 41/64 0.665 0.617 27/64 0.446 0.398
7/8 0.8750 1-5/16 1.312 1.269 1.516 1.447 3/4 0.776 0.724 31/64 0.510 0.458
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 0.887 0.831 35/64 0.575 0.519
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 0.999 0.939 39/64 0.639 0.579
1-1/4 1.2500 1-7/8 1.875 1.812 2.165 2.066 1-1/16 1.094 1.030 23/32 0.751 0.687
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138 25/32 0.815 0.747
1-1/2 1.5000 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245 27/32 0.880 0.808
Nominal
Diameter
Round Angle
Small Round Grinding Round General Round d Small Angle Big Angle
d D t d D t d D t D t D t
1 1.1 2.5 0.3
1.2 1.3 2.8 0.3
(1.4) 1.5 3 0.3
1.6 1.7 3.8 0.3
(1.7) 1.8 3.8 0.3
2 2.2 4.3 0.5 2.2 5 0.3
(2.2) 2.4 4.6 0.5 2.4 6.5 0.5
(2.3) 2.5 4.6 0.5 2.5 6.5 0.5
2.5 2.7 5 0.5 2.7 6.5 0.5
(2.6) 2.8 5 0.5 2.8 6.5 0.5
3 3.2 6 0.5 3.2 7 0.5
(3.5) 3.7 7 0.5 3.7 9 0.5
4 4.3 8 0.8 4.3 9 0.8
(4.5) 4.8 9 0.8 4.3 10 0.5
5 5.3 10 1 5.3 10 1
6 6.4 11.5 1.6 6.4 12.5 1.6 6.6 12.5 1.6 6.6 17 1.2 20 2.3
8 8.4 15.5 1.6 8.4 17 1.6 9 17 1.6 9 23 1.6 26 2.3
10 10.5 18 2 10.5 21 2 11 21 2 11 28 1.6 32 2.3
12 13 21 2.5 13 24 2.5 14 24 2.3 14 35 2.3 40 3.2
(14) 15 24 2.5 15 28 2.5 16 28 3.2 16 40 3.2 44 3.2
16 17 28 3 17 30 3 18 30 3.2 18 45 3.2 52 4.5
(18) 19 30 3 19 34 3 20 34 3.2 20 50 4.5 55 4.5
20 21 34 3 21 37 3 22 37 3.2 22 56 4.5 62 6
(22) 23 37 3 23 39 3 24 39 3.2 24 64 4.5 68 6
24 25 39 4 25 44 4 26 44 4.5 26 68 6 72 6
(27) 28 44 4 28 50 4 30 50 4.5 30 80 6
30 31 50 4 31 56 4 33 56 4.5 33 90 6
(33) 34 56 5 34 60 5 36 60 6 36 100 8
36 37 60 5 37 66 5 39 66 6 39 110 8
(39) 40 66 6 40 72 6 42 72 5 42 115 8
Alloys name
(UNS NO)
Ingredient
(%)
Density
(g/㎠)
Mechanical properties(Temperature) Properties
State Tensile strength
1000PSI
(Mpa)
Yield strength
1000PSI (Mpa)
0.2% offset
Hardness
Brinell
(ROCK-WELL)
HASTELLOY
B-2
(N10665)
Ni BAL, Cr1.0, Mo28, Mn1.0, Fe,
Fe2.0, Sio.10, Co1.0, C0.01
9.22 Annealed 132.5
(914)
57.5
(396)
228
(B-98)
Improvement of corrosion resistance on
welding
heat effecting part.
HASTELLOY
C-276
(N10276)
Ni BAL, W4, Mo 28, Co2.5,
Cr15.5, Mn1.0, Fe3.0, C0.01
8.89 Annealed 114.9
(792)
51.6
(396)
184
(B-90)
Improvement of corrosion resistance on
welding
heat effecting part.
HASTELLOY
C-4
(N06455)
Ni BAL, Co2.0, Cr16, Mn1.0,
Mo15.5, Ti0.7, Fe3.0, C0.01
8.64 Annealed 116.2
(801)
61.0
(421)
194
(B-92)
Improved high temperature stability.
HASTELLOY
C-22
(N06022)
Ni BAL, Cr20-22.5, Mo12.5-14.5,
W2.5-3.5, Co2.5, C0.01
8.69 Annealed 116.3
(802)
58.5
(403)
184
(B-90)
More excellent corrosion resistance tha C-276.
HASTELLOY
G
(N06007)
Ni BAL, Co0.25, Cr22, Nb+Ta2,
Fe195, Cu2, Mo6.5, Mn1.5, W1, Si1
8.30 Annealed 102.0
(730)
46.2
(319)
161
(B-84)
Excellent corrosion resistance in high
temperature
sulfate or phosphate.
HASTELLOY
G-3
(N06985)
Ni BAL, Co5, Cr21-23.5, Cul5-2.5,
Fe18-21, W1.5, Mo6-8, Si1, Mn1, C0.015
8.30 Annealed 99.0
(6830
44.0
(303)
158
(B-83)
Excellent corrosion resistance in high
temperature
sulfate or phosphate.
HASTELLOY
G-30
(N06030)
Ni BAL, Mo5.0, Cr29.5, W2.5,
Fe15, Mn2.0, Ca1.7, Co5.0, Si1.0
8.22 Annealed 100
(690)
47
(324)
176
(B-88)
Excellent corrosion resistance in industrial
phosphori
c acid and strong holy oxidation.
HASTELLOY
X
(N06002)
Ni BAL, Co1.5, Cr22, Si1, Fe18.5,
Mn1, Mo9, @0.6, Cc1, Al0.5, Ti0.15
8.22 Annealed 109.5
(755)
55.9
(385)
194
(B-92)

Excellent corrosion resistance in high

temperature strength.

ALLOY
20
(N08020)
Ni35, Mo2.5, Fe37,
Cr20, Cu3.5
8.0 Annealed 90
(620)
45
(310)
183
(B-90)

Excellent corrosion resistance in oxidzing

and reducing enviroment.

NICKEL
200
(N02200)
Ni99.6
C0.15 MAX
8.89 Annealed 55 – 80
(380 – 550)
15 – 30
(100 – 210)
90 – 120

Made of pure Nickel with good mechanical

properties and excellent corrosion resistance.

NICKEL
201
(N02201)
Ni99.6
C0.15 MAX
8.89 Annealed 55 – 80
(380 – 550)
15 – 30
(100 – 210)
90 – 120

With properties like Nickel 200 and low carbon,

suitable for over 300℃ purpose.

MONEL
400
(N04400)
Ni99.6
Cu31.5
8.83 Annealed 70 – 90
(480 – 620)
25 – 50
(170 – 340)
110 – 149

Alloy with strength and good weldability,

highly corrosion resistance for various purpose.

MONEL
R-405
(N04405)
Ni66.5
Cu31.5
S0.04
8.83 Annealed 70 – 85
(480 – 590)
25 – 40
(170 – 280)
110 – 140 More excellent mechinabilith than Monel 400.
MONEL
R-450
(CT1500)
Cu68
Ni30
Fe0.7
Annealed 56
(385)
24
(165)
90 Excellent weldability abd corrosion resistance.
MONEL
K-500
(N05500)
Ni65.5, Cu29.5
Al2.7, Ti0.6
8.46 Aged 140 – 190
(970 – 1310)
110 – 150
(760 – 1030)
265 – 346 Age hardening type alloy with Monel
400 properties
and superior strength.
INCONEL
600
(N06600)
Ni76, Cr15.5
Fe8
7.42 Annealed 80 – 100
(550 – 690)
30 – 50
(210 – 340)
120 – 170 Alloy of high nickel and chrome
with
excellent corrosion resistance
in oxidizing
and reducing enviroment.
INCONEL
601
(N06601)
Ni60.5, Cr23
Fe14, Al1.4
8.06 Annealed 80 – 115
(550 – 690)
30 – 60
(210 – 340)
110 – 150 High temperature, excellent oxidation resistance
INCONEL
617
(N06617)
Ni52, Mo9, C22
Al1.2, Co12.5
8.36 Annealed 110
(760)
51
(350)
173 High temperature, excellent oxidation resistance
INCONEL
625
(N06625)
Ni61, Cr21.5
Mo9, Nb+Ta3.6
8.44 Annealed 135
(930)
75
(520)
180 From very low temperature to 980℃ even
keeping
high strength, toughness and
fatigue strength of
oxidation resistance.
INCONEL
690
(N06690)
8.19 Annealed 100
(690)
55
(375)
184 Excellent corrosion resistance in chemical
medicines
of oxidation and sulfurcontaining gas.
INCONEL
718
(N07718)
Ni52.5, Mo3, Cr19
Fe18.5, Nb+Ta1.0
8.19 Aged 196
(1350)
171
(1180)
382 It is possible to weld in aging condition from low
temperature of -250℃ to high temperature of 700℃

with excellent strength (excellent oxidation
resistance Max. 980℃

INCOLOY
X-750
(N07750)
Ni73, Ti2.5, Cr15.5
Al0.8, Fe7, Nb+Ta1.0
8.25 Aged 162 – 193
(1120 – 1330)
115 – 142
(790 – 980)
300 – 390

Age hardening type alloy with excellent corrosion

resistance and oxidation resistance.

INCOLOY
800
(N08800)
Ni32.5, Fe46, Cr21 7.95 Annealed 75 – 100
(520 – 690)
30 – 60
(210 – 410)
120 – 184 Excellent hogh temperature strength
INCOLOY
800HT
(N08811)
Ni32.5, C0.08, Fe46
Cr21, Nb+Ta1.0
7.95 Annealed 65 – 95
(450 – 660)
20 – 50
(140 – 660)
100 – 184 Excellent hogh temperature strength
INCOLOY
825
(N08825)
Ni42, Cu2.2, Fe30
Cr21.5, Mo3
8.14 Annealed 85 – 105
(590 – 720)
35 – 65
(240 – 450)
120 – 180

With good properties for a wide range of industries,

particularly in the field of corrosion and
reducibility acid.

CHEMICAL COMPOSITION AND MECHANICAL PROPERTIES ACCORDING TO ASTOM STANDARDS
DESIGNATION GRADE 1 GRADE 2 GRADE 3 GRADE 4 GRADE 5 GRADE 7 GRADE 11
Oxygen (O) 0.18 0.25 0.35 0.40 0.20 0.25 0.18
Nitrogen (N) 0.03 0.03 0.05 0.05 0.05 0.03 0.03
Hydrogen (H) 0.015 0.015 0.015 0.015 0.015 0.015 0.015
Carbon (C) 0.10 0.10 0.10 0.10 0.10 0.10 0.10
Iron (Fe) 0.20 0.30 0.30 0.50 0.40 0.30 0.20
Aluminium (Al) 5.5 – 6.75
Vanadium (V) 3.5 – 4.5
Palladium (Pd) 0.12 – 0.25 0.12 – 0.25
Residual each (total) 0.10 (0.4) 0.10 (0.4) 0.10 (0.4) 0.10 (0.4) 0.10 (0.4) 0.10 (0.4) 0.10 (0.4)
Tensile Strength Mpa min. 240 345 450 550 895 345 240
Tensile strength (Ksi) (35) (50) (65) (80) (130) (50) (35)
Yield Strength Mpa 170 – 310 275 – 450 380 – 550 483 – 655 830 275 – 450 170 – 310
Yield strength (Ksi) (24 – 45) (40 – 65) (55 – 80) (70 – 95) (120) (40 – 65) (25 – 45)
Elongation % min. 24 20 18 15 10 20 24
Hardness HVtypical 100 – 150 160 – 200 180 – 220 200 – 280 310 – 350 160 – 200 100 – 150
Material Atomic
Number
Atomic
Weight
Density
(g/㎠)
Melting
Point
(℃)
Thermal
expansion
coefficient
(/℃)
Specific
heat
(cal/gr/℃)
Thermal
conductivity
(cal/㎝/sec/℃/㎝)
Electrical
resistivity
(μ Ω-㎝)
Electrical
conductivity
(% IACS)
Young’s
conductivity
(MPa)
Poisson’s
ratio
Titanium 22 47-90 4.51 1,668 8.4 × 10-6 0.124 0.041 55 3.1 106,000 0.34
Ti-6AI-4V 4.4 1,650 8.6 × 10-6 0.138 0.020 175 0.98 110,000 0.34
Iron 26 55.85 7.86 1,530 12 × 10-6 0.11 0.15 9.7 18 206,000 0.31
Stainless steel from 1,400
7.93 17 × 10-6 0.12 0.039 72 2.4 200,000 0.30
18-8 (AISI 304) to 1,420
Aluminium 13 26.97 2.7 660 23 × 10-6 0.21 0.49 2.7 64 69,000 0.33
Aluminium alloy from 476
28 23 × 10-6 0.23 0.29 5.8 30 71,600 0.33
(755-T6) to 638
Magnesium 12 24.32 1.74 650 25 × 10-6 0.24 0.38 4.3 40 44,800 0.35
Nickel 28 58.69 8.9 1,456 15 × 10-6 0.11 0.22 9.5 18 206,000 0.30
Hastelloy®c 8.9 1,305 11.3 × 10-6 0.092 0.03 130 1.3 204,600
Copper 29 63.57 8.94 1,803 17 × 10-6 0.092 0.962 1.724 100 108,000 0.34
Zirconium 40 91.22 6.52 1,852 5.8 × 10-6 0.07 0.040 40.54 3.1 9,110 0.33
Concentration
(%)
Temperature
(%)
Titanium Zirconiun St.steel
AISI 304
St. steel
AISI 316
Hastelloy
Inorganic acids Hydrochloric 1 25
acid(HCl) boiling
10 25
boiling
Sulfuric acid 1 25
(H2SO4) boiling
10 25
boiling
Nitric acid 10 25
(NHO3) boiling
65 25
boiling
Organic acids Acetic acid 10 boiling
(CH3COOH) 60 boiling
Formic acid 10 25
(HCOOH) 30 boiling
Ossalic acid 10 25
((COOH)2) 25 60
Lactic acid 10 boiling
(CH3CH(OH)COOH) 85 boiling
Alkali Sodium hydroxide 10 100
(NaOH) 40 boiling
Potassium carbonate 5 boiling
(K2CO3) 20 boiling
Inoganic chlorides Sodium chloride 25 25
(NaCl) boiling
Ammonium chloride 40 25
(NH4Cl) boiling
Zinc chloride 20 boiling
(ZnCl2) 50 boiling
Magnesium chloride 42 25
(MgCl2) boiling
Iron chloride 30 25
(FeCl3) boiling
Inoganic salts
(NaOCl)
Sodium sulphate 20 25
(Na2SO4) boiling
Sodium sulfide 10 25
(Na2s)
Sodium chloride 5 25
(NaOCl) 15 25
Sodium carbonate 30 25
(Na2CO3) boiling
Organic compounds Methlyl alcohol (CH3OH) 95 25
Carbon terachloride (CCl) 100 boiling
Phenol (C6H5OH) 포화 25
Formaldehyde (HCHO) 37 boiling
Gas Chlorine dry 25
(Cl2) wet 25
Hydrogen sulfide dry 25
(H2S) wet 25
Ammonium 100 40
(NH3) 100 100
Other Sea Water 25
100
Naptha 80
180
* Corrosion Rate
● : less than 0.125㎜/Year
▲ : 0.125 ~ 0.5㎜/Year
★ : 0.5 ~ 1.25㎜/Year
▣ : more than 1.25㎜/Year