RATNARAJ OVERSEAS NEW DEFINITIONS OF STEEL
Call us  +91 99302 00343 Request Quote
Alloy Steel Bars
Home Products Alloy Steel Bars
High-Strength Engineering Grade

Alloy Steel Bars

Chrome-molybdenum alloy steel round bars in 4140, 4130 and A182 F-grades for high-strength shafts, forgings and power piping components.

Alloy Steel Bars
ASTM / ASME Certified Material

Product Overview

Alloy steel round bar stock carrying chromium-molybdenum additions is used wherever components must combine high strength with reliable toughness — shafts, forgings and pressure-retaining parts for power and refinery service.

We stock the full P-grade family alongside general-purpose 4140/4130 for machine shops, forging units and fastener manufacturers.

Diameter5mm – 300mm
LengthUp to 6m
FinishHot Rolled, Forged, Bright, Peeled
Grades4140, 4130, A182 F5 – F91
Request Quote Talk to Our Team
Photo Gallery

Alloy Steel Bars — In Our Stockyard

Specification

Available Grades

GradeStandardTypical Service
4140 / 4142AISI/SAE 4140Cr-Mo high-strength shafting & fasteners
4130AISI/SAE 4130Cr-Mo aircraft & pressure-quality bar
A182 F5 / F9 / F11 / F22 / F91ASTM A182Power plant & refinery bar stock
8620AISI/SAE 8620Case-hardening grade for gears & pins
Technical Data

Specifications

  • Diameter5mm – 300mm
  • Length3m – 6m
  • Grades4140, 4130, A182 F5–F91, 8620
  • ManufactureHot Rolled, Forged, Cold Drawn
  • FinishBlack, Bright, Peeled, Polished
  • TestingDimensional, UT, PMI on request
  • CertificationEN 10204 3.1 / 3.2 Mill Test Cert.
  • PackingBundled, tagged by heat number

Technical Note — Positive Material Identification (PMI) is available on every lot to confirm chromium and molybdenum content, and straightness is inspected on every bundle before dispatch.

Where It's Used

Applications

Power Generation

Oil & Gas Equipment

Valve & Pump Parts

Forgings & Shafts

Get a Price

Request a Quote for Alloy Steel Bars

Share size, grade and quantity for the fastest response from our sales team.