ASTM A193 Gr. B7 F1554 Gr. 55 Alloy Steel Bar for High Tensile Bolt

• Type: Round or Hexagon
• Standard: AISI, ASTM, DIN, JIS
• Composition: Ferrous Steel Scrap
• Technique: Hot Rolled+Qt or Cold Drawn+Qt
• Shape: Bar
• Surface Treatment: Polished,Cold Drawn or Griding
• Model NO.: alloy steel bar
• Special Use: Fasteners
• Application: Structural Steel Bar
• Raw Material: Alloy Steel Rod
• Usage: High Tensile Bolt
• Threading Rod: Threaded Rod
• Main Grade: ASTM A193 B7,B16,4140,Scm440
• Transport Package: Anti-Rust Packaging
• Specification: size: 5-100mm
• Trademark: Dajin
• Origin: China
• Production Capacity: 30000

Product Description

ASTM A193 Gr.B7 F1554 Gr.55  alloy  steel bar for high tensile bolt
Alloy steel  bar B16  B6  B7 B7M(AISI 4140 4142 4145 4140H) for high tensile bolts
Grade: ASTM A193 B16  B7 B
Mark: Cr-Mo
Size: 12mm-300mm
Application:autopart or high tensile bolts 




Chemical composition:

	C	Mn	P	S	Si	Cr	Mo	V	Al
Chemical composition	0.36 0.47	0.45 0.70	Max 0.035	Max 0.040	0.15 0.35	0.80 1.15	0.50 0.65	0.25 0.35	Max 0.015
tolerance	+-0.02	+-0.03	+-0.005	+-0.005	+-0.02	+-0.05	+-0.03	+-0.03

Type: Ferrite steel
Shapes and Dimensions:

Nominal Size(mm)	Cross Section Size(mm)	Length (mm)	Straightness (mm/m)	Corner Angle	Corner Radius (mm)	Ground Roughness Rt(max)
125-130RCS	125-130 (+3, -5)	2800-3000	Max. 5	90°+-2°	10-25	100um

Size Tolerance:
Length tolerance: +50mm/-0mm
Side length tolerance: +/-2mm
Straightness: Max 3mm/m
Quality Contation
Both end of each bar must be cut.
Ladle furnanced and vacuum de-gassed
Show heat No. on each bar
Surface condition the surface of the hot rolled square bar shall befree cracks, scar and wrinkles that affect the use of the billets. In case there is the above-mentioned defect, it shall be remove.