Square billet 150*150 27SiMn deformed steel bar

27SiMn deformed steel bar 1. Important building material 2. Welcome OEM 3. Make new moulds for you

 Square billet 150*150 27SiMn deformed steel bar

Grade	GB Q255/JIS SS490/DIN S275J0/ASTM 1025
Chemical Composition	C	Si	Mn	S	P	Cr
	0.17	0.17	0.6	0.04	0.04	3.9
Standard	GB,JIS,ASTM,DIN,AISI,BS
Size	carbon steel      Width: 500mm-3300mm                          Length:7000mm-12000mm
	carbon steel round bar: diameter 18-300mm
Surface treatment	as your requirement
Inspecting	UTS according to SEP1921 C/c or GB/T6402
Quality Control	test products mechanical and chemical properties in every procedure(third party inspection institution: CIQ, SGS, ITS, BV, etc)
Delivery State	Hot forged, Black &Annealing
Hardness	HBS=137~269
Characteristic Application	welding is well, Used for making normal machinery parts, such as bolt, chain, pull rod, shape steel, steel plate, flat bar steel and so on
Packaging	We provide the package according to the export standard or as client's requirements.
Delivery Time	within 30 days after we receive the deposit
Material	42CrMo/45#/40Cr/20CrMnTi/27SiMn/16Mn

Isothermal annealing:

Heat to 850°Chold for 1/2 hour to 1 hour;

Furnace cooling to 770°C and hold at temperature for at least 10 hours;

Cool by 10°C /h to 720°C;

Cooling in air.

Stress relieving:

To be carried out after machining and before the final heat treatment.

Heat to 650-700°C, hold for 4/6 hours:

Furnace cooling to 330-350°C;

Cooling in air.

Hardening:

Initial preheating to 350-450°C;

Second preheating to 750-850°Cin salt bath at 850°C;

Austenitizing at 960-100°C;

Cooling in fluid oil.

  

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