Min. Order : 100 Kilograms
>=500 Kilograms

Industrial Forged AISI 5140 5145 5150 Alloy Steel Round Bar for Connecting Rod

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Port: Tianjin
Payment Terms: L/C,D/P,T/T,Western Union,MoneyGram,Trade Assurance
Supply Ability: 5000 Ton/Tons per Month
Place of Origin: Tianjin China
Product Name: AISI 5140 5145 5150 Alloy Steel Round Bar
Tolerance: +_0.1MM,H9 or K11,0/+1mm,0/+2mm for size,±3%
Grade: 5140 5145 5150
Standard: AiSi,ASTM,bs,DIN,GB,JIS
Hardness: HBS: <=179
Model Number: 5140 5145 5150
Tensile strength (N/mm2Mpa): >=835
Processing Service: Cutting
Surface: Black,Pickled, Brushed Polished
Brand Name: Longford
Special Use: Cold Heading Steel
Reduction of area: >=40%
Type: Alloy Steel Bar
Alloy Or Not: Is Alloy
Length: 1-12m
Yield strength: >=540
Elongation %: >=10
Technique: Hot Rolled,Cold Drawn,Forged
Application: Structural Steel Bar
Diameter: 10mm~1200mm
Steel Grade: 5140 5145 5150
Packaging Detail: 1>In bundles, plywood cases, wooden cases with water-proof package 2>Wooden Case 3>According to your demand
Tianjin Longford Metal Products Co., Ltd.
Manufacturer, Trading Company
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Industrial Forged AISI 5140 5145  5150 Alloy Steel Round Bar for Connecting Rod

Standard ASTM A29, ASTM A108, ASTM A255, ASTM A322, ASTM A370, ASTM A388 API 6A Class K, PSL 3, API 16A ISO 15156, NACE MR-1075 , EN 10204 3.1
Diameter  5mm-800mm
Length  100mm-120mm
Surface  Forged condition, Annealing , Black or Milled surface
  • High strength,
  • High tenacity
  • Good hardenability 
  • High resistance to thermal properties.
  • Competitive price
  • Fast production leadtime 
  • All the material are inspected with 3 times to meet the highly standards

          Alloy Steel Round is used in Oil & Gas, Refineries, Fertilizers, Heat-Exchangers, Paper & Pulp, Pharmaceuticals, Chemicals, Water Treatment, Dairy, Sugar & Food Processing, Construction, Mining, Shipbuilding, Offshore, Defence, Ports, Railway, Nuclear Power, Power Plant, Cement, Government Org., Engineering Co., Oil Mills


 * Hot rolled technology:EAF+LF+VD

* Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface 



 Alloy Bars under 12.70mm hardened and tempered and cold finished.

 Alloy Round Bars over 12.70mm hot finished and hardened and tempered or if specified hardened and tempered and cold finished.





 Forged Round Alloy Steel Bar Chemical Composition

Grade C Mn Si S P Cr Fe
5140 0.38-0.43 0.7-0.9 0.15-0.35 ≤ 0.035 ≤ 0.04 0.7-0.9 -
5145 0.43 - 0.48  0.70 - 0.90 0.15 - 0.30 0.040  0.035 0.70 - 0.90 97.35 - 98.02
5150 0.48-0.53 0.70 – 0.90 0.20-0.35  0.040   0.040 0.70-0.90 -

 Alloy Bar Mechanical Properties

Grade Tensile Strength Yield Strength Elongation Reduction of Area Impact Charpy-V Temperature
5140 ≥740Mpa ≥460Mpa ≥17% ≥62% ≥108J 860℃

 Cold Drawn Alloy Round Bar Tolerance


 Alloy Round Bar Application Industry


Company Information




 Q1.What is alloy bar export packing?

      Usually bundling for large diameter,small diameter bars in bulk or as customer's           demand.

Q2.What is your moq of alloy round bar?

     We accept small order,if it is stock,any quantities can be accepted.

Q3.What is your lead time?

     Normaly it is 7-10 days for producing,or negotiation.

Q4.Can you supply C alloy bar sample?

    Yes,we can.Sample fee according to your size.

Q5.Can you provide deep precessing service?

    Sure,We own laser cutting equipment,large cutting equipment,We can keep                    the min tolerance.

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