China Gr. 8.8 Round Bars / SAE 5140 40cr Cold Drawn Q&T Steel Round Bar

• Type: Alloy Steel Bar
• Technique: Quenched and Tempered
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Products: Qt Steel Round Bars
• Property Standard: ISO Grade 8.8
• Model NO.: Gr. 8.8 round bar
• Grade Specification: 40cr / SAE 5140
• Applications: Anchor Bolts, Threaded Rods, Fasteners
• Transport Package: Standard Export Packing
• Specification: M6-M100
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

China Gr. 8.8 Round Bars / SAE 5140 40cr Cold Drawn Q&T Steel Round Bar

Gr.8.8 round bars is the right material for Gr.8.8 threaded rods, anchor bolts, stud bolts , such high strength steel round bars, our processing usually have : Hot rolled, Hot rolled+Q&T, Cold drawn+Q&t, Peeled+Q&T and so on.

Our QT processing will be done through the Medium frequency quenching furnace, which can gurantee the good straightness. so during the production of threading, it will have no hurt to the mould.


Gr.8.8 round bars / SAE 5140 40Cr  cold drawn Q&T steel round bar

1.Chemical composition:

Element	Content (%)
Iron, Fe	97.395-98.07
Manganese, Mn	0.700-0.900
Chromium, Cr	0.700-0.900
Carbon, C	0.380-0.430
Silicon, Si	0.150-0.300
Sulfur, S	≤ 0.0400
Phosphorous, P	≤ 0.0350

2.Mechanical property of Gr.8.8

Tensile strength	Yiled strength	Elongation	Reduction area
Min	Min	Min	Min
830	640	12%	50%

3.Equivalent grade to SAE 5140

ASTM	JIS	DIN	BS	NF
5140	SCr440	41Cr4(1.7035)	530A40	42C4

 

4.Delivery condition and sizes we can offer:
Hot rolled :16mm to 300mm
Cold Drawn:6mm to 100mm
Q&T (Quenched&Tempered): 6mm to 300mm

5.MOQ:2tons per size
6.Delivery time : 7-30 days upon to your order details.