Q355B Carbon Steel Round Bar - Low Alloy Structural Rod

QIDAMT · CARBON STEEL ROUND BAR

Q355B Carbon Steel Round Bar – Low Alloy Structural Rod

Hot-rolled Q355B (16مينيسوتا) low-alloy high-strength round bar for shafts, bolts, structural components and machinery parts.

Q355B carbon steel round bar is a hot-rolled low-alloy high-strength structural steel (former 16Mn) with 355 MPa minimum yield. It is widely used in engineering machinery, الجسور, ships and construction where Q235 strength is not enough.

Key Advantages

High Strength

355 MPa yield, ~20 % stronger than Q235B.

Good Toughness

B-grade Charpy test at +20 درجة مئوية.

Weldable

Excellent welding for structural connections.

Cost Effective

Lower cost than alloy or stainless equivalents.

التركيب الكيميائي (س355ب)

عنصر	ج	و	مينيسوتا	ص	س
محتوى %	≤ 0.24	≤ 0.55	1.00 - 1.60	≤ 0.035	≤ 0.035

الخصائص الميكانيكية

Tensile strength (σb): 470 - 630 الآلام والكروب الذهنية
Yield strength (σs): ≥ 355 الآلام والكروب الذهنية (≤ 16 mm thick)
استطالة (δ): ≥ 21 %
Impact (Charpy V): ≥ 34 J at +20 درجة مئوية

Standard Sizes

Parameter	Range
Diameter	16 - 300 مم
طول	3 - 6 م (cut to length)
سطح	أسود / peeled / ساطع
معيار	جيجابايت/ت 1591 / equivalent ASTM A572 Gr.50

التطبيقات

Q355B round bar is used for shafts, bolts and nuts, التروس, crane hooks, bridge components, truck frames, structural columns and heavy machinery parts. For general Q235B round bar see our Q235B round bar; for high-strength plate see Q355B plate.