萱華 工業股份有限公司 QUALITY Precision Steel Pipe Manufacturer

Reference

Class
Symbol
Chemical Composition (%)
C
Si
Mn
P
S
Cr
Mo
SCM 420 TK
—
0.18~0.23
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
SCM 415 TK
—
0.13~0.18
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
SCM 418 TK
—
0.16~0.21
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
SCM 420 TK
—
0.18~0.23
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
SCM 430 TK
Akin to STKSTKS1
0.28~0.33
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
SCM 435 TK
Akin to STKSTKS2
0.33~0.38
0.15-0.35
0.60~0.85
0.030max
0.030max
0.90~1.20
0.15~0.30
 
Symbol
Chemical Composition (%)
Tension Test
C
Si
Mn
P
S
NborV
Tensile Strength
N/mm2
Yield Point
N/mm2
Elongation of Test
Piece 
No.11
Piece 
No.11
STC370  
0.25max
0.35max
0.30-0.90
0.040max
0.040max
—
370min
215min
30min
STC440  
0.25max
0.35max
0.30-0.90
0.040max
0.040max
—
440min
305min
10min
STC510A
0.25max
0.35max
0.30-0.90
0.040max
0.040max
—
510min
380min
10min
STC510B
0.18max
0.55max
1.50max
0.040max
0.040max
—
510min
380min
15min
STC540  
0.25max
0.55max
1.60max
0.040max
0.040max
0.15max
540min
390min
20min
STC590A
0.25max
0.35max
0.30~0.90
0.040max
0.040max
—
590min
490min
10min
STC590B
0.25max 以下
0.35max
1.50max
0.040max
0.040max
—
590min
490min
15min

 
General category
Symbol
Chemical Composition(%)
Tension Test
C
Si
Mn
P
S
 Tensile Strength
N/mm2 		YieldPoint
N/mm2 		Elongation of Test
No.11&12(%)
11 A STKM11A 0.12max 0.35max 0.60max 0.040max 0.040max 290min. — 35min.
12 A STKM12A 0.20max 0.35max 0.60max 0.040max 0.040max 340min. 175min. 35min.
B STKM12B 390min. 275min. 25min.
C STKM12C 470min. 355min. 20min.
13 A STKM13A 0.25max 0.35max 0.30~0.90 0.040max 0.040max 370min. 215 min. 30min.
B STKM13B 440min. 305min. 20min.
C STKM13C 510min. 380min. 15min.
14 A STKM14A 0.30max 0.35max 0.30~1.00 0.040max 0.040max 410min. 245min. 25min.
B STKM14B 500min. 355min. 15min.
C STKM14C 550min. 410min. 15min.
15 A STKM15A 0.25~0.35 0.35max 0.30~1.00 0.040max 0.040max 470min. 275min. 22min.
C STKM15C 580min. 43 5min. 12min.
16 A STKM16A 0.35~0.45 0.40max 0.40~1.00 0.040max 0.040max 510min. 32 5min. 20min.
C STKM16C 620min. 460min. 12min.
17 A STKM17A 0.45~0.55 0.40max 0.40~1.00 0.040max 0.040max 550min. 345min. 20min.
C STKM17C 650min. 480min. 10min.
18 A STKM18A 0.18max 0.55max 1.05max 0.040max 0.040max 440min. 275min. 25min.
B STKM18B 490min. 315min. 23min.
C STKM18C 510min. 380min. 15min.
19 A STKM19A 0.25max 0.55max 1.50max 0.040max 0.040max 490min. 315min. 23min.
C STKM19C 550min. 410min. 15min.
20 A STKM20A 0.25max 0.55max 1.60max 0.040max 0.040max 540min. 390min.
23min.
STEEL DESIGNATION
JIS G3445 STKM18A
JIS G4105 SAE 4130 SCM415 SCM430
SNCM415 SNCM430
Can be custom-made according to specification
CHART OF NORM COMPARISON
 
 
U.S.A Germany Italy France U.K Japan
SAE1015 DIN 2393   UNI 663 NF-A49643 BS 6323 JIS-G3445
ST 37-2 Fe 3600 TS 37a CDW3/ERW3 STKM12A
SAE1020 DIN 2393   UNI 663 NF-A49643 BS 6323 JIS-G3445
ST 44-2 Fe 4100 TS 42a CDW4/ERW4 STKM13A
SAE1024 DIN 2393   UNI 663 NF-A49643 BS 6323 JIS-G3445
ST52-3 Fe 5100 TS 47a CDW5/ERW5 STKM19A
ERW:Eltrical Welded Tube
CDW:Cold Drawn Tube
  |   EXCERPTS FROM STEEL TUBE SPECICATIONS
JIS G3445 Carbon Steel Tubes for Machine Structural Purposes
Class Symbol Chemical Composition Tension Test
C Si Mn P S Tensile Strength
N/mm 2
Yield Point
n/mm 2
Elongation of Test Piece
No.11 & 12(%)
11 A STKM 11A 0.12max 0.35max 0.60max 0.040max 0.040max 290min 　 35min
12 A STKM 12A 0.20max 0.35max 0.60max 0.040max 0.040max 340min 175min 35min
B STKM 12B 390min 275min 25min
C STKM 12C 470min 355min 20min
13 A STKM 13A 0.25max 0.35max 0.30-0.90 0.040max 0.040max 370min 215min 30min
B STKM 13B 440min 305min 20min
C STKM 13C 510min 380min 15min
14 A STKM 14A 0.30max 0.35max 0.35-1.00 0.040max 0.040max 410min 245min 25min
B STKM 14B 500min 355min 15min
C STKM 14C 550min 410min 15min
15 A STKM 15A 0.25-0.35 0.35max 0.35-1.00 0.040max 0.040max 470min 275min 22min
B STKM 15B 580min 430min 12min
16 A STKM 16A 0.35-0.45 0.40max 0.40-1.00 0.040max 0.040max 510min 325min 20min
B STKM 16B 620min 460min 12min
17 A STKM 17A 0.45-0.55 0.40max 0.40-1.00 0.040max 0.040max 550min 345min 20min
B STKM 17B 650min 480min 10min
18 A STKM 18A 0.18max 0.55max 1.50max 0.040max 0.040max 440min 275min 25min
B STKM 18B 490min 315min 23min
C STKM 18C 510min 380min 15min
19 A STKM 19A 0.25max 0.55max 1.50max 0.040max 0.040max 490min 315min 23min
B STKM 19B 550min 410min 15min
20 A STKM 20A 0.25max 0.55max 1.60max 0.040max 0.040max 540min 390min 23min
JIS G3441 Alloy Steel Tubes
Class
種類代號		 Symbol Chemical Cpmposition
C Si Mn P S Cr Mo
SCM 420 TK - 0.18-0.23 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
SCM 41 5TK - 0.13-0.18 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
SCM 418 TK - 0.16-0.21 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
SCM 420 TK - 0.18-0.23 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
SCM 430 TK Akin to STKS1
STKS1		 0.28-0.33 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
SCM 435 TK Akin to STKS2
STKS2		 0.33-0.38 0.15-0.35 0.60-0.85 0.030max 0.030max 0.90-1.20 0.15-0.30
Pemarks: 1. As impurities. Ni and Cu for each grade shall no exceed 0.25% and 0.30%. Respectively
              2. When the customer require product analysis, the tolerance of all composition mentioned above shall be specified detailedly on table 3 of JIS G0321
Carbon Steel  
SAE No. Chemical Composition % Equivalent
AISI No. 		SAE No. Chemical Composition % Equivalent
AISI No. 		SAE No. Chemical Composition % Equivalent
AISI No.
C Mn C Mn C Mn
1005 0.06max 0.35max 1005 1022 0.18-0.23 0.70-1.00 1022 1043 0.40-0.47 0.70-1.00 1043
1006 0.08max 0.25-0.40 1006 1023 0.20-0.25 0.30-0.60 1023 1044 0.43-0.50 0.60-0.90 1044
1008 0.10max 0.30-0.50 1008 1025 0.22-0.28 0.60-0.90 1025 1045 0.43-0.50 0.60-0.90 1045
1010 0.08-0.13 0.30-0.60 1010 1026 0.22-0.28 0.60-0.90 1026 1046 0.43-0.50 0.70-1.00 1046
1012 0.10-0.15 0.30-0.60 1012 1029 0.25-0.31 0.60-0.90 1029 1049 0.46-0.53 0.60-0.90 1049
1015 0.13-0.18 0.30-0.60 1015 1030 0.28-0.34 0.60-0.90 1030 1050 0.48-0.55 0.60-0.90 1050
1016 0.13-0.18 0.60-0.90 1016 1035 0.32-0.38 0.60-0.90 1035 1053 0.48-0.55 0.70-1.00 1053
1017 0.15-0.20 0.30-0.60 1017 1038 035-0.420 0.60-0.90 1038 1055 0.50-0.60 0.60-0.90 1055
10018 0.15-0.20 0.60-0.90 1018 1039 0.37-0.44 0.70.-1.00 1039 1060 0.55-0.65 0.60-0.90 1060
1020 0.18-0.23 0.30-0.60 1020 1040 0.37-0.44 0.60-0.90 1040 　 　 　 　
1021 0.18-0.23 0.60-0.90 1021 1042 0.40-0.47 0.60-0.90 1042 　 　 　 　
High Manganese Carbon Steel
SAE No. Chemical Composition % Equivalent
AISI No.
C Mn P max S max
1522 0.18-0.24 1.10-1.40 0.030 0.050 1522
1524 0.19-0.25 1.35-1.65 0.030 0.050 1524
1526 0.22-0.29 1.10-1.40 0.030 0.050 1526
1527 0.22-0.29 1.20-1.50 0.030 0.050 1527
1536 0.30-0.38 1.20-1.55 0.030 0.050 1536
1541 0.36-0.44 1.35-1.65 0.030 0.050 1541
1548 0.44-0.52 1.10-1.40 0.030 0.050 1548
1552 0.47-0.55 1.20-1.50 0.030 0.050 1552
1556 0.60-0.71 0.85-1.15 0.030 0.050 1556
Alloy Steel
SAE No. Chemical Composition % Equivalent
AISI No.
C Mn P S Si Ni Cr Mo
4118 0.18-0.23 0.70-0.90 0.030 0.040 0.15-0.35 - 0.40-0.60 0.08-0.15 4118
4130 0.28-0.33 0.40-0.60 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4130
4135 0.33-0.38 0.70-0.90 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4135
4137 0.35-0.40 0.70-0.90 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4137
4140 0.38-0.43 0.75-1.00 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4140
4142 0.40-0.45 0.75-1.00 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4142
4145 0.43-0.48 0.75-1.00 0.030 0.040 0.15-0.35 - 0.80-1.10 0.15-0.25 4145
CONVERSION TABLE FOR VARIOUS HARDNESS
Vickers Brinell Rockwell Shore Tensile Strength (N/mm 2 )
B C
470 441 　 46.9 　 1570
460 433 　 46.1 62 1530
450 425 　 45.3 　 1495
440 415 　 44.5 59 1460
430 405 　 43.6 　 1410
420 397 　 42.7 57 1370
410 388 　 41.8 　 1330
400 379 　 40.8 55 1290
390 369 　 39.8 　 1240
380 360 (110.0) 38.8 52 1205
370 350 　 37.7 　 1170
360 341 (109.0) 36.6 50 1130
350 331 　 35.5 　 1095
340 322 (108.0) 34.4 47 1070
330 313 　 33.3 　 1035
320 303 (107.0) 32.2 45 1005
310 294 　 31.0 　 980
300 284 (105.5) 29.8 42 950
295 280 　 29.2 　 935
290 275 (104.5) 28.5 41 915
285 270 　 27.8 　 905
280 265 (103.5) 27.1 40 890
275 261 　 26.4 　 875
270 256 (102.5) 25.6 38 855
265 252 　 24.8 　 840
260 247 (101.0) 24.0 37 825
255 243 　 23.1 　 805
250 238 99.5 22.2 36 795
245 233 　 21.3 　 780
240 228 98.1 20.3 34 765
230 219 96.7 (18.0) 33 730
220 209 95.0 (15.7) 32 695
210 200 93.4 (13.4) 30 670
200 190 91.5 (11.0) 29 635
190 181 89.5 (8.5) 28 605
180 171 87.1 (6.0) 26 580
170 162 85.0 (3.0) 25 545
160 152 81.7 　 24 515
150 143 78.7 　 22 490
140 1332 75.0 　 21 455
130 124 71.2 　 20 425
120 114 66.7 　 　 390
110 105 62.3 　 　 　
100 95 56.2 　 　 　
95 90 52.0 　 　 　
90 86 48.0 　 　 　
85 81 41.0