Premium Tin Mill Black Steel Supplier | CJM Steel – 15+ Years Expertise

Product Overview‌

CJM specializes in high-quality ‌tin mill black steel‌/tinplate base steel, a cold-rolled, low-carbon steel with superior surface finish and formability. Our products meet international standards (ASTM, JIS, EN) and are widely used in packaging, construction, and industrial applications.

Why Choose CJM Steel?‌

• 15+ Years of Expertise‌: Trusted supplier with a global footprint.
• 1 Million+ Tons Annual Inventory‌: Ensures stable supply and quick delivery.
• End-to-End Solutions‌: Combines sales, precision cutting, processing, and logistics.
• Global Markets‌: Serving Europe, South America, the Middle East, India, and beyond.

	Temper Designation	Nominal  Rockwell Hardness HR30TSm	Applications
Single Reduced	T-1	49	Deep drawing where special pliability is necessary
	T-2	53	Drawing where pliability is necessary
	T-2.5	55	Applications requiring a fair amount of pliability
	T-3	57	Applications requiring a fair amount of strength
	T-3.5	59	Applications requiring a fair amount of strength and good toughness
	T-4	61	Applications requiring relatively good toughness
	T-4.5	63	Applications requiring good toughness
	T-5	65	Applications requiring hardness and good denting resistance
Double Reduced	DR-7.5	71	Applications requiring hardness and rigidity
	DR-8	72	Applications requiring hardness and rigidity
	DR-8.5	73	Applications requiring | hardness and rigidity
	DR-9	75	Same as above (somewhat harder)
	DR-9M	76	Same as above (still harder)
	DR-10	79	Same as above (very hard)
Full Hard	M		Same as above (extremely hard)

Thickness	0.14-0.60mm	0.0055″-0.023″inch
Width	260-1050mm	10.23″-41.33″inch
Temper Grade	T1, T2, T3 , T4, T5, DR7-DR9
Substrate Type	MR, SPCC, L, D
Standard	GB/T 2520-2000, JIS G3303-2002 and DIN EN 10203-1991
*Here are normal size and standard, special requirements please contact us

Classification	Representation of Tin Coating Weight	Tin Plating Nominal Weight (g/m2)	Minimum Average Tin Plating Weight (g/m2)
Equal Tin Plating (E)	1.1 / 1.1	1.1 / 1.1	1.8
	2.2 / 2.2	2.2 / 2.2	4
	2.8 / 2.8	2.8 / 2.8	5
	5.6 / 5.6	5.6 / 5.6	10.5

Key Features

• Superior Surface Quality‌: Oxide-free, ideal for painting or coating.
• Excellent Formability‌: High elongation (≥30%) for complex fabrication.
• Customization‌: Slit coils, sheets, or blanks to your specifications.

Applications‌

• Packaging‌: Cans, containers, and lids.
• Automotive‌: Interior panels and structural parts.
• Construction‌: Roofing, HVAC, and electrical enclosures.
• Household Appliances‌: Refrigerators, washing machines.

Quality Assurance & Testing‌

• In-House Lab Testing‌: Spectrometer analysis for chemical composition, hardness testing (Rockwell B), and surface roughness checks.
• Dimensional Accuracy‌: Laser micrometers for thickness/width verification.
• Defect Detection‌: Automated eddy current scanning for surface flaws.
• Performance Tests‌: Salt spray testing (up to 500 hours) for corrosion resistance.

Production Process Flow‌

Factory & Equipment‌

Packaging Standards‌

Packaging & Logistics‌

• Standard Export Packaging‌: Waterproof paper + steel straps + wooden pallets.
• Flexible Options‌: OEM packaging or bulk shipments.
• Global Logistics‌: FOB, CIF, or door-to-door delivery with real-time tracking.

Contact Us‌

Ready to order or need a quote? Email or call us for more information.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment