Mycron Steel Berhad | A pioneer in Cold Rolled Coils (CRC) and Steel Pipes

MYCRON STEEL CRC SDN BHD - COLD ROLLED COILS

Overview

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Mycron Steel CRC Sdn Bhd ("Mycron"), a wholly owned subsidiary of Mycron Steel Berhad, was incorporated on 6 January 1989 and commenced operations in June 1990. Mycron is the first Malaysian Cold Rolled Coil ("CRC") manufacturer and the only Bumiputera-owned steel company in Malaysia.

It now boasts a diversified client base, supplying to drum manufacturers, galvanizing and roofing industries, steel cable trucking industry, pipe and furniture producers, automotive manufacturers, electrical and home appliance industries.

Mycron’s 18-acre site is located in Shah Alam and currently has an installed capacity of 260,000 metric tonnes per annum. Over the years, continuous investments were made to acquire state-of-the-art machinery and equipment to cater to various needs of customers. Its production facilities include the continuous pickling line, 6-high cold reduction mill, electrical cleaning line, recoiling line, and combined skinpass mill and tension levelling line.

It is also equipped with chemical, mechanical and metallurgical testing laboratories. With improved surface quality, higher grade material and competitive prices, Mycron Steel CRC strives to deliver the highest quality cold rolled coils.

Specifications

Standard JIS G 3141 / MS 2651 (Cold-reduced carbon steel sheet and strip of commercial and drawing qualities)

1. Classification and symbol

Symbol of grade

Symbol of grade Application
SPCC Commercial quality
SPCD Drawing quality
SPCE Deep drawing quality
SPCF Non-ageing deep drawing quality



Temper grade

Temper grade Symbol of temper grade
As-annealed A
Standard temper grade S
⅛ hard 8
¼ hard 4
½ hard 2
Full hard 1
⅛ hard, ¼ hard, ½ hard and full hard are only applicable to SPCC.



Surface finished

Surface finish Symbol of surface finish Remarks
Dull finish D A matt finish produced with a roll of which the surface is roughened mechanically or chemically.
Bright finish B A smooth finish produced with a roll of which the surface is finished smoothly.
This table is not applicable to the steel sheet and strip as annealed.








2. Chemical composition

Unit: %
Symbol of grade C Mn P S
SPCC 0.15 max. 0.60 max. 0.050 max. 0.035 max.
SPCD 0.10 max. 0.50 max. 0.040 max. 0.035 max.
SPCE 0.08 max. 0.45 max. 0.030 max. 0.030 max.
SPCF 0.06 max. 0.45 max. 0.030 max. 0.030 max.
Alloying elements other than those in this table may be added as necessary. Note a) The upper limit value if Mn, P or S may be altered upon the agreement between the purchaser and the manufacturer.

Remarks:
a. Where the non-aging is guaranteed by the order of purchaser for SPCE sheet or strip normally refined or as it is annealed, its symbol for classification shall be SPCEN, which has a suffix N at the end.




3. Mechanical Properties

Tensile strength, Elongation and Non-aging Property.

Symbol of grade Yield point or proof stress (N/mm2) Tensile strength (N/mm2) Elongation % Tensile test piece
Thickness mm Thickness mm
0.25 or over 0.25 or over 0.25 or over to and excl. 0.30 0.30 or over to and excl. 0.40 0.40 or over to and excl. 0.60 0.60 or over to and excl. 1.0 1.0 or over to and excl. 1.6 1.6 or over to and excl. 2.5 2.5 or over
SPCC - 270 min 28 min 31 min 34 min 36 min 37 min 38 min 39 min No. 5 test piece, rolling direction
SPCD (240 max.) 270 min 30 min 33 min 36 min 38 min 39 min 40 min 41 min
SPCE (220 max.) 270 min 32 min 35 min 38 min 40 min 41 min 42 min 43 min
SPCF (210 max.) 270 min - - 40 min 42 min 43 min 44 min 43 min

Remarks:
a. The tensile test value does not usually apply to SPCC. When required by the purchaser, however the value in parentheses shall be adopted.
b. For those less than 0.60 mm in thickness, the tensile test shall generally be omitted.
c. This table applies to those of 30mm or more in width.




Hardness and Bendability

Rockwell hardness of hard material (HRB)

Temper grade Symbol of temper grade HRBS or HRBW
JIS G3141 MS 2651
⅛ hard 8 50 to 71 50 - 71
¼ hard 4 65 to 80 60 – 80
½ hard 2 74 to 89 70 – 89
Full hard 1 85 or over 84 min
Note a) The measurement shall be either by HRBS or HRBW. However in case of any doubt arising, HRBS shall be applied.

4. Permissible Variations in Dimensions and Shapes

A) Thickness Tolerance
i) Tolerances A on Thickness (JIS G 3141)

Unit : mm
Thickness Width
Under 630 630 or over to and excl. 1000 1000 or over to and excl. 1250 1250 or over to and excl. 1600 1600 or over
Under 0.25 ± 0.03 ± 0.03 ± 0.03 - -
0.25 or over to and excl. 0.40 ± 0.04 ± 0.04 ± 0.04 - -
0.40 or over to and excl. 0.60 ± 0.05 ± 0.05 ± 0.05 ± 0.06 -
0.60 or over to and excl. 0.80 ± 0.06 ± 0.06 ± 0.06 ± 0.06 ± 0.07
0.80 or over to and excl. 1.00 ± 0.06 ± 0.06 ± 0.07 ± 0.08 ± 0.09
1.00 or over to and excl. 1.25 ± 0.07 ± 0.07 ± 0.08 ± 0.09 ± 0.11
1.25 or over to and excl. 1.60 ± 0.08 ± 0.09 ± 0.10 ± 0.11 ± 0.13
1.60 or over to and excl. 2.00 ± 0.10 ± 0.11 ± 0.12 ± 0.13 ± 0.15
2.00 or over to and excl. 2.50 ± 0.12 ± 0.13 ± 0.14 ± 0.15 ± 0.17



ii) Tolerances A on Thickness (MS 2651)

Unit : mm
Thickness Width
600 ≤ 1200 1200 < b ≤ 1500 1500 < b ≤ 1800
Under or equal 0.4 ± 0.03 ± 0.05 -
0.4 < t ≤ 0.6 ± 0.04 ± 0.05 ± 0.06
0.6 < t ≤ 0.8 ± 0.05 ± 0.05 ± 0.07
0.8 < t ≤ 1.0 ± 0.06 ± 0.07 ± 0.08
1.0 < t ≤ 1.2 ± 0.07 ± 0.08 ± 0.10
1.2 < t ≤ 1.6 ± 0.09 ± 0.10 ± 0.12
1.6 < t ≤ 2.0 ± 0.11 ± 0.12 ± 0.14
2.0 < t ≤ 2.5 ± 0.13 ± 0.14 ± 0.16



B) Width Tolerances

The width tolerances shall be as follows:

i) The width tolerances shall be applied to the nominal width.



Width Tolerances, Class A

Unit : mm
Width
Under 1250 1250 or over
+7 +10
0 0



C) Tolerances A on Flatness

Unit : mm
Width Type of strain
Bow, wave Edge wave Centre buckle
Under 1000 12 8 6
1000 or over to and excl. 1250 15 9 8
1250 or over to and excl. 1600 15 11 8



D) Camber Tolerances

Unit : mm
Width Division of steel sheet and steel strip
Steel sheet Steel strip
JIS G3141 MS 2651 Under 2000 in length 2000 or over in length
30 or over to and excl. 40 30 or over to and excl. 40 8 8 in any 2000 in length
40 or over to and excl. 630 40 or over to and excl. 600 4 4 in any 2000 in length
630 or over 600 or over 2 2 in any 2000 in length



Standard JIS G 3135 (Cold-reduced high strength steel sheet and strip with improved formability for automobile structural uses)

1. Classification and symbol

Symbol of grade

Symbol of grade Applicable thickness mm Application
SPFC 340 0.6 or over up to and incl. 2.0 Drawing use
SPFC 370
SPFC 390 Forming use
SPFC 440



2. Mechanical Properties

Tensile strength, Elongation and Non-aging Property.

Symbol of grade Tensile strength (N/mm2) Yield point or proof stress N/mm2 Elongation % Paint bake hardenability amount N/mm2 Tensile test piece
Thickness mm
0.6 over to and excl. 1.0 mm 1.0 or over to and excl. 2.3 mm
SPFC 340 340 or over 175 or over 34 or over 35 or over - No. 5 test piece taken in transverse rolling direction
SPFC 370 370 or over 205 or over 32 or over 33 or over -
SPFC 390 390 or over 235 or over 30 or over 31 or over -
SPFC 440 440 or over 265 or over 26 or over 27 or over -



Standard JFS A 2001 (Cold-rolled steel sheet and strip for automobile use)

1. Classification and symbol

Symbol of grade

Symbol of grade Application thickness Type & Designation
JSC 270C 0.30 to 1.40 Mild Steel Sheet
JSC 270D 0.30 to 1.20
JSC 270E
JSC 340W 0.40 to 1.60 Commercial type steel sheet
JSC 370W
JSC 390W
JSC 440W


2. Mechanical Properties

Tensile strength, yield point or proof stress, elongation, amount of bake-hardening and mean plastic strain ratio.

Type and designation Tensile strength N/mm2 Yield point or proof stress N/mm2 Elongation % Amount of bake-harden-ing N/mm2 Test piece Hole expansibility Mean plastic strain ratio
Thickness mm Thickness mm Hole expand ratio % Test Piece Thickness mm
0.3≤
0.4>
0.4≤
0.8>
0.8≤
1.0>
1.0≤
3.2≥
0.3≤
0.4>
0.4≤
0.6>
0.6≤
0.8>
0.8≤
1.0>
1.0≤
1.2>
1.2≤
1.6>
1.6≤
2.0>
2.0≤
2.5>
0.5≤
1.0≥
1.0≤
1.6≥
Mild steel sheet JSC 270C 270≤ 155≤
275≥
145≤
265≥
135≤
255≥
125≤
245≥
36≤
45≥
37≤
46≥
38≤
47≥
39≤
48≥
40≤
49≥
41≤
50≥
42≤
53≥
43≤
55≥
- JIS No.5 Rolling direc- tion - - - -
JSC 270D - 135≤
225≥
125≤
215≥
115≤
205≥
- 40≤
49≥
41≤
50≥
42≤
51≥
43≤
52≥
44≤
53≥
45≤
55≥
46≤
57≥
1.2≤ 1.1≤
JSC 270E 130≤
205 ≥
120≤
195 ≥
110≤
185 ≥
42≤
50≥
43≤
51≥
44≤
52≥
45≤
53≥
46≤
54≥
47≤
56≥
48≤
58≥
1.4≤ 1.3≤
Commercial type ratio type steel sheet JCS 340W 340≤ - 205≤
305≥
195≤
295≥
185≤
285≥
- 33≤
43≥
34≤
44≥
35≤
45≥
36≤
46≥
37≤
47≥
38≤ - JIS No. 5 Perpen-dicular to rolling direc-tion - - - -
JCS 370W 370≤ 205≤
305≥
195≤
295≥
185≤
285≥
30≤
40≥
31≤
41≥
32≤
42≥
33≤
43≥
34≤
44≥
35≤
JCS 390W 390≤ 245≤
355≥
235≤
345≥
225≤
335≥
29≤
40≥
30≤
41≥
31≤
42≥
32≤
43≥
33≤
44≥
34≤
JCS 440W 440≤ 285≤
390≥
275≤
380≥
265≤
370≥
26≤
38≥
27≤
39≥
28≤
40≥
29≤
41≥
30≤
42≥
31≤



Standard JIS G 3131 (Hot-rolled carbon steel strip and sheet of commercial and drawing qualities)

1. Classification and symbol

Symbol of grade

Symbol of grade Application thickness mm Application
SPHC 1.80 or over up to and incl. 3.50 For commercial
SPHD For processing
SPHE
SPHF


2. Chemical composition

Unit: %
Symbol of grade C Mn P S
SPHC 0.12 max. 0.60 max. 0.045 max. 0.035 max.
SPHD 0.10 max. 0.45 max. 0.035 max. 0.035 max.
SPHE 0.08 max. 0.40 max. 0.030 max. 0.030 max.
SPHF 0.08 max. 0.35 max. 0.025 max. 0.025 max.


3. Mechanical Properties

Tensile strength, Elongation and Non-aging Property.

Symbol of grade Tensile strength b) (N/mm2) Elongation % Tensile test piece
Thickness mm
1.2 mm or over to and excl. 1.6 mm 1.6 mm or over to and excl. 2.0 mm 2.0 mm or over to and excl. 2.5 mm 2.5 mm or over to and excl. 3.2 mm 3.2 mm or over to and excl. 4.0 mm
SPHC 270 min. 27 min 29 min 29 min 29 min 31 min No. 5 in rolling direction
SPHD 270 min. 27 min 30 min 32 min 33 min 35 min
SPHE 270 min. 27 min 31 min 33 min 35 min 37 min
SPHF 270 min. 37 min 38 min 39 min 39 min 40 min
Notes :
a) The value specified in the table shall not be applied to the irregular portions of both ends of the steel strip
b) The following tensile strength may be applied as the upper limit of tensile strength as agreed between the purchaser and the manufacturer.



Standard JIS G 3113 (Hot-rolled steel plate, sheet and strip for automobile structural uses)

1. Classification and symbol

Symbol of grade

Symbol of grade Application thickness mm
SAPH 310 1.80 or over up to and incl. 3.50
SAPH 370
SAPH 400
SAPH 440


2. Chemical composition

Unit: %
Symbol of grade P S
SAPH 310 0.040 or under 0.040 or under
SAPH 370
SAPH 400
SAPH 440


3. Mechanical Properties

Tensile strength, Elongation and Non-aging Property.

Symbol of grade Tensile strength (N/mm2) Yield point or proof stress N/mm2 Elongation % Tensile test piece
Thickness mm Thickness mm
Under 6.0 1.6 or over to and excl. 2.0 mm 2.0 or over to and excl. 2.5 2.5 or over to and excl. 3.15 3.15 or over to and excl. 4.0
SAPH 310 310 min. (185) min 33 min 34 min 36 min 38 min No. 5 test piece taken in rolling direction
SAPH 370 370 min. 225 min 32 min 33 min 35 min 36 min
SAPH 400 400 min. 255 min 31 min 32 min 34 min 35 min
SAPH 440 440 min. 305 min 29 min 30 min 32 min 33 min



Standard JIS G 3132 (Hot-rolled carbon steel strip for pipes and tubes)

1. Classification and symbol

Symbol of grade

Symbol of grade Application thickness mm
SPHT 1 1.80 or over up to and incl. 3.50
SPHT 2
SPHT 3
SPHT 4


2. Chemical composition

Unit: %
Symbol of grade C Si Mn P S
SPHT 1 0.10 max. 0.35 max. 0.50 max. 0.040 0.040
SPHT 2 0.18 max. 0.35 max. 0.60 max. 0.040 0.040
SPHT 3 0.25 max. 0.35 max. 0.30 to 0.90 0.040 0.040
SPHT 4 0.30 max. 0.35 max. 0.30 to 1.00 0.040 0.040


3. Mechanical Properties

Tensile strength, Elongation and Non-aging Property.

Symbol of grade Tensile strength (N/mm2) Elongation % Tensile test piece Bendability
Thickness mm Bendability angle Inside radius Test piece
1.2 or over to and excl. 1.6 1.6 or over to and excl. 3.0 3.0 or over to and 6.0 Thickness mm
3.0 or under Over 3.0 up to and incl. 13
SPHT 1 270 min 30 min 32 min 35 min No. 5 taken in rolling direction 180 ˚ Flat on itself Thickness x 0.5 No. 3 taken in rolling direction
SPHT 2 340 min 25 min 27 min 30 min Thickness x 1.0 Thickness x 1.5
SPHT 3 410 min (20 min) 22 min 25 min Thickness x 1.5 Thickness x 2.0
SPHT 4 490 min (15 min) 18 min 20 min Thickness x 1.5 Thickness x 2.0
Mechanical properties shall not be applicable to the both ends of streel strip which is irregular portion. The values in parentheses are the referential values and may be applied under the agreement between the manufacturer and the purchaser.


4. Permissible Variations in Dimensions and Shapes

A) Tolerances on Thickness for all Pickle and Oiled.

Unit: mm
Thickness Width
Under 1200 1200 or over to and excl. 1500
1.60 or over to and excl. 2.00 ± 0.16 ± 0.17
2.00 or over to and excl. 2.50 ± 0.17 ± 0.19
2.50 or over to and excl. 3.15 ± 0.19 ± 0.21
3.15 or over to and excl. 4.00 ± 0.21 ± 0.23

Product Range

SPECIFICATION : JIS G 3141 (SPC)    Cold-reduced carbon steel sheet and strip of commercial and drawing qualities
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
SPCC-A - 0.30 - 2.50 700 - 1250 General Use
SPCC-SD Dull Finish General Use,
Furniture, Tubes,
Cabinet, Drum,
Automotive Parts,
Electrical Parts
SPCC-8D Dull Finish 0.30 - 2.00 Electrical Parts,
Electronic Parts,
Computer Parts,
Automotive Parts
SPCC-8B Bright Finish
SPCC-4D Dull Finish
SPCC-4B Bright Finish
SPCC-2D Dull Finish
SPCC-2B Bright Finish
SPCC-1B Bright Finish 0.20 - 2.30 Strapping / Bailing
Hoop, Motorcycle,
Bicycle Parts & etc
0.20 - 1.60 G.I & Other
Coated Sheet
SPCD Dull Finish 0.30 - 1.20 Automotive Parts,
Electrical Parts,
Electronic Parts,
Fire Extinguisher
SPCE 0.40 - 1.20
SPCF



SPECIFICATION : JFS A 2001 (JFS)    Cold-rolled steel sheet and strip for automobile use
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
JSC 270 C Dull Finish 0.30 - 1.40 700 - 1250 Automotive Inner Parts
JSC 270 D 0.30 - 1.20
JSC 270 E
JSC 340 W 0.40 - 1.60
JSC 370 W
JSC 390 W
JSC 440 W



SPECIFICATION : JIS G 3135 (SPFC)    Cold-reduced high strength steel sheet and strip with improved formability for automobile structural uses
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
SPFC 340 Dull Finish 0.60 - 2.00 700 - 1250 Automotive Parts & Tubes
SPFC 370
SPFC 390
SPFC 440



SPECIFICATION : JIS G 3113 (SAPH)    Hot-rolled steel plate, sheet and strip for automobile structural uses
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
SAPH 310 Dull Finish 1.80 - 3.50 700 - 1250 Hot Rolled Steel plate,
sheet and strip for
automotive structural
use
SAPH 370
SAPH 400
SAPH 440



SPECIFICATION : JIS G 3131 (SPH)    Hot-rolled carbon steel strip and sheet of commercial and drawing qualities
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
SPHC Dull Finish 1.80 - 3.50 700 - 1250 Commercial Quality
SPHD Drawing Quality
SPHE Deep Drawing Quality
SPHF Deep Drawing Quality
ai killed



SPECIFICATION : JIS G 3132 (SPHT)    Hot-rolled carbon steel strip for pipes and tubes
Symbol Of Quality Surface Finish Thickness (mm) Width (mm) Application / User
SPHT 1 Dull Finish 1.80 - 3.50 700 - 1250 Hot Rolled carbon
steel strip for
pipes and tubes
SPHT 2
SPHT 3
SPHT 4

Ordering Information

An order or enquiry should contain the following information:

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Certification

Mycron Steel Berhad, via its main operating segments, Mycron Steel CRC Sdn Bhd ("MCRC") and Melewar Steel Tube Sdn Bhd ("MST") constantly strives to improve operational excellence and meet customers' expectations.

MCRC achieved its first ISO 9001 certification by SIRIM and IQ Net in 1996 followed by MST in 1997. Over the years, MCRC and MST have established a more effective Quality Management System to adapt to the latest global challenges.

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In September 2016, MCRC obtained product certification by SIRIM in recognition product quality compliance against the Malaysian Standard (MS 2651 : 2015) and Japanese Industrial Standards (JIS G3141 : 2011). Our products are verified, tested and confirmed, in meeting the parameters covered by the two mentioned Quality Standards. These certifications are beneficial not only to MCRC, but also the industry as a whole, as they provide our customers with assurance of quality and reliability. We are continually raising the bar as far as quality is concerned, aligned with our mission, to be the highest Quality Cold Rolled Steel Sheets manufacturer in Malaysia.

On the environment front, MCRC plays a pivotal role in ensuring continual improvement of environmental performance in all its business operations. In June 2014, MCRC obtained the ISO 14001 : 2004 Environmental Management System certification and in June 2017, MCRC was certified with ISO 14001 : 2015.

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Process Flow

CRC MANUFACTURING PROCESS

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