BS550MCK4

BS550MCK4 hot rolling carbon low-alloy high strength steel design by reducing the carbon equivalent of the steel and welding crack sensitivity index, and use of advanced smelting equipment and technology to strengthen the collection of micro-alloying technology, good weldability.

BS550MCK4 steel chemical composition :

Grade

C

Si

Mn

P

S

Alt

B

BS550MCK4

≤0.12

≤0.50

≤2.0

≤0.015

≤0.005

≥0.015

---

BS550MCK4 steel Mechanical Properties

Grade

Thickness
(mm)

Yield Strength Re(MPa)

tensile strength Rm(MPa)

Elongation A5(%)

Shock Value
IE (J)

BS550MCK4

6-12

560-645

650-740

16-26

120-280

Good Weldability --- carbon equivalent(Ceq) and weld crack sensitivity index(Pcm)

Grade

Performance carbon content C(%)

Performance carbon content Ceq

Welding sensitivity index performance Pcm

BS550MCK4

≤0.08

≤0.49

≤0.22

Ceq = C + Mn/6 (Cu + Ni)/15 + (Cr + Mo + V)/5
Pcm =C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B

BS550MCK4 steels plate/sheet are featured :
1 . Good formability. All grades of BS steel can be cold formed.
2 . Excellent welding performance. The steels have low welding crack sensitivity and the properties of welding joint are good.
3 . Good toughness at low temperature.

BS550MCK4 Delivery status: BS series adopt high-strength steel-rolled (TMCP) delivery.

The number of samples required for each batch of steel sheet and strip the test items, sampling methods, test methods shall be in accordance with Table 1

No.

Pilot projects

Number of tests,A

Sampling methods

Test method

1

Chemical analysis

Each furnace

GB/T20066

GB/T223 or GB/T4335

2

Stretching test

1

GB/T2975

GB/T228

3

Bending test

1

GB/T2975

GB/T232

Shanghai Royal Industry Will return you with high-quality products and complete after-sale service with the lowest price. we committed to exceed customer's expectation on the basis of quality, price, and delivery. We sincerely hope to establish long-term cooperation relationship with you on the basis of mutual benefit, reciprocity and common development. As BS550MCK4 Mechanical and BS550MCK4 suppliers, we can supply BS550MCK4 Chemical, BS550MCK4 Mechanical and BS550MCK4 standard for you ,please contact us :info@sg295steel.com

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