Name: Alloy structure steel round bar/ Alloy steel round bar/ steel round bar
Brand: LSQ
Availability: InStock

Product Details

steel round bar

Alloy steel AISI 4340 Forged Round Bar

AISI 4340 Alloy Steel Used for manufacture big sized important Quenched-and-Tempered parts which request good toughness and high strength. Such as top load shaft in heavy-duty machinery and steam turbine shaft, vane, and heavy-load transmission parts, fastening piece, crankshaft, gears etc. With diameter is biger than 250mm.

Chemical composition:

C	Si	Mn	P	S	Cr	Ni	Mo
0.38/0.43	0.15/0.35	0.60/0.80	≤0.035	≤0.040	0.7/0.9	1.65/2.0	0.2/0.3

Equivalent Grades:	SAE	4340	JIS	SNCM439
	Greman W.Stoff No.	1.6582	GB	40CrNiMoA
	BS	816M40	EN	24

SPECIFICATION OF ALLOY STEEL AISI4340 ROUND BARS:

Diameter:	130mm-1000mm (optional)
Length:	1000mm-12000mm Straightness: 3mm/M max(optional)
Process:	Forged from vacuum degassed ingots.
Delivery condition:	Hot forged Rough machined (black surface after Q/T) Turned (optional)
Delivery Time:	30-60days
Heat treatment:	Normalized / Annealed / Quenched / tempered (optional)
Technical Data:	According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing
Properties:	As your request
Test:	Ultrasonic test according to SEP 1921-84 Class C/c and D/d (optional)
Marking:	Grade, heat NO. length will be stamped one each bar with required color
Payment:	30% advance by TT, Balance pay before the shipment against shipping documents or irrevocable LC at sight