Stainless Steel

Stainless Steel Solutions

High-Quality Raw Material Supply & Precision Slitting Services Customized to Customer Specifications

Stainless Steel Coil Material & Precision Slitting

KOMASTEC provides optimal Stainless Steel Coil raw materials and precision slitting services tailored to the dimensions and quality standards required by our customers. Based on superior corrosion resistance and workability, we reliably supply high-quality processed materials across various industries.

Stainless steel is a high-performance steel alloy with significantly enhanced corrosion resistance (rust prevention), heat resistance, and workability achieved by adding alloying elements such as chromium (Cr) and nickel (Ni). A dense chromium oxide passive layer (protective film) forms on the surface to prevent corrosion from moisture and chemical substances.

KOMASTEC handles various grades and finishes (such as 2B, BA, No.4, HL) including STS 300 and 400 series coil materials. Utilizing advanced slitter equipment, we perform precision slitting to the customer's desired thickness (T) and width (W). In particular, we supply slitting products optimized to maximize productivity in downstream processes through strict burr management, edge quality control, and precise tolerance management.

Main Supply Items (Cold Rolled Stainless Steel & Coils)

Grade / Type		Surface Finish	Thickness (Weight)	Supply Width	Monthly Supply	Remarks / Applications
300 Series	304	BA 2B 2D HL NO.4 Etc	0.1mm ~ 3mm	3.5mm ~ 1524mm	500 MT	General Industrial Use Automotive Industry Petrochemical Facilities Architectural Interior & Exterior
	304L
	316
	316L
	321
	309
400 Series	409L	2B 2D Etc	0.3mm ~ 4mm	5mm ~ 1524mm	1000 MT	Automotive Exhaust Systems Architectural Interior & Exterior Home Appliances
	439
	441
	436J1L
	436L
	444
	430J1L

Raw Material Origin: POSCO, Hyundai BNG Steel, and other premium domestic products

Product Gallery & Details

STAINLESS STEEL COIL

STAINLESS STEEL SHEET

COIL (AFTER PACKING)

Surface Protection

Material	Type	Color	Thickness (mm)	Features & Applications
PVC (Polyvinyl Chloride)	PWY (Logo Printed) PWN (No Logo)	White	0.10 (100㎛)	Opaque Film Excellent recovery property after stretching Strong adhesion Surface protection for bending and architectural materials (No.4, No.8, HL, SM)
PVC (Polyvinyl Chloride)	PE	Blue	0.08 (80㎛)	Semi-transparent Film Excellent recovery property after stretching Superior adhesion Surface protection during drawing and forming (No.4, No.8, HL, SM)
PE (Polyethylene)	PE	Clear	0.05 (50㎛)	Transparent Film No recovery property after stretching Light adhesion Surface protection for primary drawing products (No. 2B, No.4, HL)
PE (Polyethylene)	EB	Blue	0.08 (80㎛)

Chemical Composition

System	Types	Chemical Composition (%)
System	Types	C	Si (Max)	Mn (Max)	P (Max)	S (Max)	Cr	Ni	Mo	ETC
Austenite	301	0.15 Max	1.0	2.0	0.045	0.03	16.0~18.0	6.0~8.0	-	-
	304	0.08 Max	1.0	2.0	0.045	0.03	18.0~20.0	8.0~10.5	-	-
	304J1	0.08 Max	1.0	2.0	0.045	0.03	15.0~18.0	6.0~9.0	-	Cu 1.0~3.0
	304L	0.03 Max	1.0	2.0	0.045	0.03	18.0~20.0	9.0~13.0	-	-
	321	0.08 Max	1.0	2.0	0.045	0.045	17.0~19.0	9.0~13.0	-	Ti5×C%min
	316	0.08 Max	1.0	2.0	0.045	0.03	16.0~18.0	10.0~14.0	-	-
	316L	0.03 Max	1.0	2.0	0.045	0.03	16.0~18.0	12.0~15.0	2.0~3.0	-
Ferrite	430J1L	0.25 Max	1.0	1.0	0.04	0.03	16.0~18.0	-	-	Cu 0.3~0.8
	430	0.12 Max	0.12	0.1	0.04	0.03	16.0~18.0	-	-	-
	409L	0.03 Max	1.0	1.0	0.04	0.03	10.5~11.7	-	-	Ti5×C%~0.75
	439	0.07 Max	1.0	1.0	0.04	0.03	17.0~19.0	-	-	N 0.04MAX Ti 0.2+4(C%+N%)~1.1%
	441	0.03 Max	1.0	-	-	-	17.5~18.5	1.0 MAX	-	Ti 0.1~0.6 Nb 9C+0.3~1.0
	436L	0.025 Max	1.0	1.0	0.04	0.03	16.9~19.0	-	0.75~1.25	N 0.025MAX Ti Nb Zr 8x(C%+N%)~0.08
	436J1L	0.06 Max	0.12	0.25	0.02	0.001	17.5	0.15	0.5	Ti 0.30 N75
Martensite	420J2	0.26~0.40	1.0	1.0	0.04	0.03	12.0~14.0	-	-	-
Martensite	410	0.15 Max	0.15	1.0	0.04	0.03	11.5~13.5	-	-	-

Mechanical Properties

System	Types	Mechanical Property					Application
System	Types	Y/S (N/㎟) (Min)	T/S (N/㎟)	E/S (%) (Min)	Hardness Hv (Max)	Specific Gravity	Application
Austenite	301	205	520	40	218	7.93	Not suitable for deep drawing, spring, Railway vehicles
	304	205	520	40	200	7.93	Food equipment, general chemical
	304J1	155	450	40	200	7.93	Deep drawing
	304L	175	480	40	200	7.93	Part which cannot be subjected to postweld heat treatment
	321	205	520	40	200	7.93	Chemical plant
	316	205	502	40	200	7.98	Materials resistant to milk and dairy products
	316L	175	480	40	200	7.98	Oil refinery
Ferrite	430J1L	205	394	25	200	7.75	Household utensils
	430	205	450	22	200	7.7	Building interior Finishing, Household utensils
	409L	175	360	25	175	7.75	Converter, muffler
	439	205	415	22	200	7.75	High quality muffler
	441	250	430~630	25	175	7.60	Exhaust Manifold, Front pipe, Catalytic Converter
	436L	245	410	20	230	7.75	Deep drawing
	436J1L	300	435	34	145	7.75	-
Martensite	420J2	225	540	18	247	7.75	Cutlery, valves, straightedges
Martensite	410	206	441	20	210	7.75	Straightedge

Surface Finish

Finish	Manufacturing Method	Applications
No. 1	Hot rolled, heat treated, and pickled surface.	Industrial tanks, chemical process equipment
No. 2D	Cold rolled, heat treated, and pickled surface.	Petrochemical plants, pipes
No. 2B	Cold rolled, heat treated, pickled, and lightly skin-passed surface. Superior gloss and flatness compared to 2D.	Kitchenware, tableware, building materials
No. 3	Polished with #100~#120 abrasive belt on 2B surface.	Architectural trim, kitchen equipment
No. 4	Polished with #150~#180 abrasive belt on 2B surface. Finer texture than No.3.	Dairy industry equipment, kitchen facilities
No. 6	Finer finish than No.4 with reduced reflection, presenting an elegant dull finish.	Architectural interior/exterior panels
No. 7	Buff polished using #400~#600 abrasives; semi-reflective surface with minor polishing lines remaining.	Dairy processing equipment, architectural trim
No. 8	Highly polished mirror-like finish using BUFF with #800+ abrasives.	Architectural trim, small mirrors
HL (Hair Line)	Continuous longitudinal grain finish using #150~#180 grit abrasive belt on No.4 surface.	Architectural panels, sash doors
L-HL (Light Hair Line)	Continuous grain finish using #400 grit abrasive belt on No.4 surface; smoother and more delicate than HL.	Building materials, vehicle trim
SM (Super Mirror)	Ultra-high gloss mirror finish superior to No.8, equivalent to glass mirror quality.	Architectural cladding, mirrors
DR (Dura Blush)	Interrupted grain pattern created using fine abrasive belts (#600) compared to L-HL.	Floppy disk components, electronic parts

European Standard (EN 10088-2)

Steel Grade EN10088-2	Germany DIN	USA ASTM	C %	Cr %	Ni %	Others %
Austenitic steels
X10CrNi18-8	1.431	S30100	0.05 to 0.15	16.00 to 19.00	6.00 to 9.50	-
X2CrNi19-11	1.4306	S30403	<0.030	18.00 to 20.00	10.00 to 12.00	-
X5CrNi18-10	1.4301	S30400	<0.07	17.00 to 19.50	8.00 to 10.50	-
X6CrNiTi18-10	1.4541	S32100	<0.08	17.00 to 19.00	9.00 to 12.00	5 x C to 0.70
X4CrNi18-12	1.4303	S30500	<0.06	17.00 to 19.00	11.00 to 13.00	-
X2CrNiMo17-12-2	1.4404	S31603	<0.030	16.50 to 18.50	10.00 to 13.00	Mo 2.00/2.50
X5CrNiMo17-12-2	1.4401	S31600	<0.07	16.50 to 18.50	10.50 to 13.00	Mo 2.00/2.50
X6CrNiMoTi17-12-2	1.4571	S31635	<0.08	16.50 to 18.50	10.50 to 13.00	Mo 2.00/2.50
X6CrNiMoTi17-12-2	1.4571	S31635	<0.08	16.50 to 18.50	10.50 to 13.00	Ti 5 x C to 0.70
-	1.4828	-	0.15	22.00 to 25.00	13.00 to 16.00	-
Ferritic steels
X2CrTi12	1.4512	S40900	Max 0.03	10.50 to 12.50	-	Ti 6 x (C+N) to 0.65
X6CrAl13	1.4002	S40500	0.08	12.00 to 14.00	-	Al 0.10 to 0.30
X6Cr17	1.4016	S43000	0.08	16.00 to 18.00	-	-
X6CrMo17-1	1.4113	AISI 434	0.08	16.00 to 18.00	-	Mo 09.0 to 1.40
Martensitic steels
X20CR13	1.4021	-	0.16 to 0.25	12.00 to 14.00	-	-
X30Cr13	1.4028	S42000	0.26 to 0.35	12.00 to 14.00	-	-
X46Cr13	1.4034	-	0.43 to 0.50	12.50 to 14.50	-	-

DIN Standard Composition & Alloy Specs

DIN Identification Code	Alloy Number	Density	C	Si	Mn	P	S	Cr	Mo	Ni	V	Nb	Ti	N	Cu
X5 CrNi 18-10	1.4301	7.9	<0.07	<1.0	<2.0	-	-	17.00-19.50	-	8.00-10.50	-	-	-	<0.11	-
X8 CrNi 19-11	1.4306	7.9	<0.030	<1.0	<2.0	-	-	18.00-20.00	-	10.00-12.00	-	-	-	<0.11	-
X2 CrNiN 19-10	1.4311	7.9	<0.030	<1.0	<2.0	-	-	17.00-19.50	-	8.50-11.50	-	-	-	<0.12-0.22	-
X5 CrNiMo 17-12-2	1.4401	8.0	<0.07	<1.0	<2.0	-	-	16.50-18.50	2.00-2.50	10.00-13.00	-	-	-	<0.11	-
X2 CrNiMo 17-13-2	1.4404	8.0	<0.030	<1.0	<2.0	-	-	16.50-18.50	2.00-2.50	10.00-13.00	-	-	-	<0.11	-
X2 CrNiMoN 17-13-3	1.4429	8.0	<0.030	<1.0	<2.0	-	-	16.50-18.50	2.50-3.0	11.00-14.00	-	-	-	<0.12-0.22	-
X2 CrNiMo 18-14-3	1.4435	8.0	<0.030	<1.0	<2.0	-	-	17.00-19.00	2.50-3.00	12.50-15.00	-	-	-	<0.11	-
X5 CrNiMo 17-13-3	1.4436	8.0	<0.05	<1.0	<2.0	-	-	16.50-18.50	2.50-3.00	10.50-13.00	-	-	-	<0.11	-
X5 CrNiMo 17-13-5	1.4439	8.0	0.030	<1.0	<2.0	-	-	18.5	5.0	14.5	-	-	-	<0.22	-
X2 CrNiMo 22-5-3	1.4462	7.8	0.030	<1.0	<2.0	-	-	23.0	3.5	6.50	-	-	-	<0.20	-
X1 NiCrMoCuN 25-20-6	1.4529	8.1	0.020	<0.5	<1.0	-	-	21.0	7.0	26.00	-	-	-	<0.25	<1.5
X1 NiCrMoCu(N) 25-20-5	1.4539	8.0	0.020	<0.7	<2.0	-	-	21.0	5.0	26.00	-	-	-	<0.15	<2.0
X6 CrNiTi 18-10	1.4541	7.9	<0.08	<1.0	<2.0	-	-	17.00-19.00	-	9.00-12.00	-	-	-	-	-
X6 CrNiMoTi 17-12-2	1.4571	8.0	<0.08	<0.01	<2.0	-	-	16.50-18.50	2.00-2.50	10.50-13.50	-	-	-	-	-
X 10CrAl 7	1.4713	7.7	<0.12	0.5-1.0	<1.0	-	-	6.00-8.00	0.5-1.00	-	-	-	-	-	-
X10 CrAl 13	1.4724	7.7	<0.12	0.7-1.4	<1.0	-	-	12.00-14.00	0.7-1.20	-	-	-	-	-	-
X10 CrAl 18	1.4742	7.7	<0.12	0.7-1.4	<1.0	-	-	17.00-19.00	0.7-1.20	-	-	-	-	-	-
X15 CrNiSi 20-12	1.4828	7.9	<0.2	1.5-2.5	<2.0	-	-	19.00-21.00	-	11.00-13.00	-	-	-	-	-
X15 CrNiSi 25-20	1.4841	7.9	<0.2	1.5-2.5	<2.0	-	-	24.00-26.00	-	19.00-22.00	-	-	-	-	-
X12 CrNiTi 18-9	1.4878/ 1.4541	7.9	<0.12	<1.0	<2.0	-	-	17.00-19.00	-	9.00-12.00	-	-	-	-	-

PRODUCTS

Stainless Steel

Stainless Steel Coil Material & Precision Slitting

Main Supply Items (Cold Rolled Stainless Steel & Coils)

STAINLESS STEEL COIL

STAINLESS STEEL COIL

STAINLESS STEEL COIL

STAINLESS STEEL SHEET

STAINLESS STEEL SHEET

COIL (AFTER PACKING)

Surface Protection

Chemical Composition

Mechanical Properties

Surface Finish

European Standard (EN 10088-2)

DIN Standard Composition & Alloy Specs