Description

Hot Rolled NO.1 Finish Stainless Steel Sheet refers to stainless steel sheets produced through hot rolling, followed by annealing and pickling. The “No.1” designation is a Japanese Industrial Standard (JIS) designation for hot-rolled, pickled surfaces, not a grade (e.g., 304 stainless steel sheet).

Characteristics of Hot Rolled NO.1 Finish Stainless Steel Sheet:

1. Surface Characteristics: Hot Rolled NO.1 Finish Stainless Steel Sheet has a uniform matte, grayish-white finish with slight rolling marks and a relatively high roughness (Ra 2.0–4.0 μm). It lacks the luster or mirror finish of cold-rolled stainless steel sheet. While pickling removes the oxide scale, it retains the inherent microscopic imperfections of hot rolling, resulting in a rough feel and a lack of decorative appeal.

2. Manufacturing Process: Hot Rolled No. 1 Finish Stainless Steel Sheet is formed from steel billets heated to approximately 1100°C via roughing/finishing mills, followed by annealing (stress relief) and pickling (descaling). It does not undergo cold rolling for leveling, resulting in lower dimensional accuracy (thickness tolerance is typically ±0.1mm or more).

3. Mechanical Properties: Compared to cold-rolled sheets (such as 2B Finish Stainless Steel Sheet and BA), Hot Rolled No. 1 Finish Stainless Steel Sheet has lower strength, higher elongation, and better toughness, but lower hardness and surface hardness. The grains are coarser due to the high-temperature rolling process, making it suitable for forming but not for applications requiring high precision or high surface finish.

4. Thickness Range: Hot Rolled No. 1 Finish Stainless Steel Sheet is typically 2.5–10mm (some can reach 150mm), significantly thicker than cold-rolled sheets (usually ≤3mm), making it suitable as a structural or load-bearing substrate.

5. Corrosion Resistance: Depends on the base steel grade (e.g., 304, 316L stainless steel sheet, etc.). The surface of Hot Rolled No.1 Finish Stainless Steel Sheet itself does not improve corrosion resistance; it only provides a clean, pickled surface. If used in corrosive environments, a corresponding grade (e.g., 304/06Cr19Ni10) must be selected, and contact with carbon steel should be avoided.

6. Cost Advantage: Hot Rolled No.1 Finish Stainless Steel Sheet has a simple manufacturing process and low energy consumption, resulting in a price approximately 20-40% lower than cold-rolled steel sheets. It is suitable for industrial applications where surface appearance is not critical but a certain level of corrosion resistance and strength is required.

Applications of Hot Rolled No.1 Finish Stainless Steel Sheet:

1. Chemical and Petroleum Equipment: Reactors, storage tanks, pipelines (commonly using 304/316L Hot Rolled No. 1 Finish Stainless Steel Sheet);

2. Pressure Vessels and Boiler Components: Hot Rolled NO.1 Finish Stainless Steel Sheet is required for thick plate structures conforming to standards such as GB/T 24511;

3. Shipbuilding and Marine Engineering: Hot Rolled NO.1 Finish Stainless Steel Sheet is used for non-exposed structural components and deck bases;

4. Food and Pharmaceutical Machinery: Internal conveyor racks, tanks (material cleanliness required, surface can be polished later);

5. Building and Structural Support: Heavy-duty supports, platforms, non-aesthetically pleasing components;

6. Cold-rolled Raw Materials: Some Hot Rolled NO.1 Finish Stainless Steel Sheet is further cold-rolled into 2B/BA plates.

Note: Hot Rolled No.1 Finish Stainless Steel Sheet is not directly used for exterior decoration, kitchenware, or high-frequency contact environments (such as handrails, curtain walls). For an aesthetically pleasing surface, further processing (such as brushing No.4, polishing) or selection of cold-rolled 2B/BA sheets is required. When purchasing, the steel type (e.g., S30408), standard (e.g., GB/T 4237) and quality certificate should be clearly specified to avoid confusion between “304” (material) and “No.1” (surface).

Standards of Stainless Steel Plate:

GB/T4238, ASTM/ASME, JIS G4305, EN10088, BSEN10028, GB/T3280, GB/T4237

GB/T20878	JIS	ASTM	KS	BSEN	AS	CNS	t/m³
12Cr13	SUS403	403	STS403	—	403	403	7.75
20Cr13	SUS420J1	420	STS420J1	1.4021	420	420J1	7.75
30Cr13	SUS420J2	—	STS420J2	1.4028	420J2	420J2	7.75
10Cr17	SUS430	430	STS430	1.4016	430	430	7.70
68Cr17	SUS440A	440A	STS440A	—	440A	440A	7.70
06Cr19Ni10	SUS304	304	STS304	1.4301	304	304	7.93
022Cr19Ni10	SUS304L	304L	STS304L	1.4306	304L	304L	7.93
06Cr17Ni12Mo2	SUS316	316	STS316	1.4401	316	316	7.98
022Cr17Ni12Mo2	SUS316L	316L	STS316L	1.4404	316L	316L	7.98
06Cr18Ni11Ti	SUS321	321	STS321	1.4541	321	321	7.93
06Cr18Ni11Nb	SUS347	347	STS347	1.455	347	347	7.98

Specification

(1) Thin stainless steel sheet (0.2mm-4mm)
(2) Stainless steel middle plate (4mm-20mm)
(3) Stainless steel thick plate (20mm-60mm)
(4) Extra thick stainless steel plate (60-115mm)

Surface

NO.1, NO.2D, NO.2B, BA, NO.3, NO.4, NO.240, NO.320, NO.400, HL, NO.7, NO.8

Standards and Classifications

All specifications products can be customized according to customer requirements
Product Name	Stainless Steel Sheet
Material	①Mainly：201, 202, 304, 304L, 304H, 316, 316L,316Ti,2205, 330, 630, 660, 409L, 321, 310S, 410, 416, 410S, 430, 347H, 2Cr13, 3Cr13 etc ②300series:301,302,303,304,304L,309,309s,310,310S,316,316L,316Ti,317L,321,347 ③200series:201,202,202cu,204 ④400series:409,409L,410,420,430,431,439,440,441,444 ⑤Others:2205,2507,2906,330,660,630,631,17-4ph,17-7ph, S318039 904L,etc ⑥Duplexstainless steel: S22053, S25073, S22253, S31803, S32205, S32304 ⑦Special Stainless Steel:904L,347/347H,317/317L,316Ti,254Mo
Thickness	0.1~200 mm,or customized
Length	100~12000 mm,or customized
Width	10~2000 mm,or customized
Standard	ASTM, JIS, GB, AISI, DIN, BS,EN,ETC,etc.
Finish	2B, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted
Packing	Industry standard packaging or according to client’s requirement
Payment terms	30%T/T in advance, the balance against the B/L copy
MOQ	3 TONS,can be customized according to your requirements.
Delivery time	Fast delievery in 7 days,up to order quantity
Application	Used in the production of electrical components, connectors, radiators,Conductive base materials,automobile water tanks, heat sinks, cylinder fins, etc.

Surface Finish	Characteristics and application
2B	The surface brightness and flatness of no2B is better than no2D. then through a special surface treatment to improve its mechanical properties,No2B could nearly satisfy comprehensive uses.
No.1	Polished with abrasive belt of grit#100-#200, have better brightness with discontinuous coarse stria, used as inner and external ornaments for building, electrical appliances and kitchen utensils etc.
No.4	Polished with abrasive belt of grit #150-#180,have better brightness with discontinuous coarse stria, but thinner than No3, are used as bathtub buildings inner and external ornaments electrical appliances kitchen utensils and food processing equipment etc.
HL	Polished with abrasive belt of grit #150-#320 on the NO.4 finish and has continuous streaks, mainly used as buildings ornaments elevators, door of building, frontal plate etc.
BA	Cold rolled, bright annealed and skin-passed, the product have excellent brightness and good reflexivity like mirror, kitchen apparatus, ornament etc.
8K	The product have excellent brightness and prefer reflexivity can to be the mirror.