Martensitic Cold Rolled Steel

Martensitic steel has high tensile strength and is the highest strength grade of high strength steel plate at present. Roll forming is usually used to produce or press simple shaped parts.

Grade	Chemical Componenta %
Grade	C	Si	Mn	P	S
HC700/900MS	≤0.20	≤0.6	≤2.0	≤0.020	≤0.015
HC700/980MS	≤0.20	≤0.6	≤2.0	≤0.020	≤0.015
HC860/1100MS	≤0.25	≤0.6	≤2.0	≤0.020	≤0.015
HC950/1180MS	≤0.25	≤1.0	≤2.0	≤0.020	≤0.015
HC1030/1300MS	≤0.28	≤1.0	≤2.5	≤0.020	≤0.015
HC1150/1400MS	≤0.28	≤1.0	≤2.5	≤0.020	≤0.015
HC1200/1500MS	≤0.30	≤1.0	≤3.0	≤0.020	≤0.015
HC1350/1700MS	≤0.35	≤1.0	≤3.0	≤0.020	≤0.015

a Al, Nb, Ti, Cr, Mo, B and other alloying elements can be added as required, and the total amount of these alloying elements is not more than 1.5% at this time.

				180° Bending Test Dia≥ (a=sample thickness)
Grade	YS Strength (MPa)	Tensile Strength (MPa)	Elongation % A50mm% Not less than	180° Bending Test Dia≥ (a=sample thickness)
HC700/900MS	700~900	≥900	4	6a
HC700/980MS	700~960	≥980	4	6a
HC860/1100MS	860~1100	≥1100	4	8a
HC950/1180MS	950~1200	≥1180	4	8a
HC1030/1300MS	1030~1300	≥1300	4	8a
HC1150/1400MS	1150~1400	≥1400	3	8a
HC1200/1500MS	1200~1500	≥1500	3	8a
HC1350/1700MS	1350~1700	≥1700	3	8a

a RP0.2 is used when the yield phenomenon is not obvious, and ReL is used.

b The sample is P17 as specified in GB/T 228.1, and the direction of the sample is transverse. If the user has special requirements can be negotiated to determine.

c The specified value of the bending test is applicable to the transverse specimen, the width of the bending specimen b≥35mm. The sample width during the arbitration test was 35mm. If the supplier can guarantee it, it may not carry out bending test.