Name: China JIS G3106 SM490A/B Carbon Steels For Machine Structural Use Suppliers - Sky Steel
Brand: Sky Steel Construction
SKU: 277816508

JIS G3106 SM490A/B Carbon Steels For Machine Structural Use

JIS G3106 is a Japanese Industrial Standard that specifies requirements for hot-rolled carbon steel plates intended primarily for welded structures. The standard covers several grades, with SM490A and SM490B being two important designations within this classification. These steels are classified as low-alloy high-strength structural steels and are designed to provide an optimal balance between strength, weldability, and toughness.

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Chemical Composition

Element	SM490A (Max, %)	SM490B (Max, %)
Carbon (C)	0.20 (≤50mm), 0.22 (>50-100mm)	0.18 (≤50mm), 0.20 (>50-100mm)
Silicon (Si)	0.55	0.55
Manganese (Mn)	1.60	1.60
Phosphorus (P)	0.035	0.035
Sulfur (S)	0.035	0.035

Products Details

Company profile

Sky Steel Construction Co. Ltd. is a largemodern iron and steel conglomerateintegrating sintering, iron making, steelmaking, continuous casting, steel rollingand metal products productiontechnology. The company has more than300 employees and 12 advanced high-frequency welding production lines. Withmore than 30 years of experience in stee!production, we can provide a variety ofsolutions to satisfy our customers.

Customers Photos

product-554-416

Advantages

Advantage Category	Key Details
Balanced Strength & Ductility	Min. yield strength 325MPa, tensile strength 490-610MPa; elongation ≥17%, easy to cut/bend.
Good Weldability	Low carbon equivalent, compatible with MIG/TIG/arc welding; no complex pre/post-heating.
Cost-Effectiveness	Mature production, wide supply; reliable performance at lower cost vs. high-strength steels.
Wide Adaptability	Suitable for -5℃ to 40℃ ambient conditions; Grade B (with impact test) fits cold regions.

Packaging

FAQ

Q:Can we visit your factory?

A: Warmly welcome, once we have your schedule, we will come to pick you up.

Q:How can we obtain a quotation?

A: Please provide the product specifications, such as material, size, shape, etc. So we can provide the best quotation.

Q:Can we get the some samples?Any charges?

A: Yes , we could offer the sample for free charge but do not pay the cost of freight . If you place the order after confirm thesample , we will refind your express freight or deducte it from the order amount .

Q:What is your minimum order quantity?

A: Usually 10 tons, special circumstances can be negotiated.

Q:What is your payment method?

A:30% TT deposit payment, 70% balance payment before shipment.

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