Carbon Steel Bar Supplier | ASTM/EN/DIN Alloy Stock | Huaxiao-Alloy

1. Technical Specifications (Standard Carbon Steel Bar Range)

ParameterCapability
Carbon Steel Bar ShapesRound · Square · Flat · Hexagonal · Channel
DimensionsDiameter/Thickness: 5mm–300mm · Length: 3,000–12,000mm
ProcessingPrecision cutting · CNC machining · Surface grinding · Stress-relieving
Surface FinishHot rolled · Cold drawn · Turned · Polished (Ra 0.4μm)
PackagingWaterproof bundling · Wooden crates · Anti-corrosion VCI film
Delivery TermsFOB Shanghai / CIF to Rotterdam · Houston · Dubai
Lead TimeStock items: 15 days · Custom sizes: 25 days

2. Global Carbon Steel Bar Grades Database

Huaxiao-Alloy produces 130+ grades across international standards with strict tolerances (±0.05mm):

StandardGradeShapeSize Range (mm)Yield Strength (MPa)Key Applications
ASTM A36Round/Flat6-300≥250Structural framing
ASTM A1081018 · 1045 · 1144Round5-150330-760Shafts · Bushings · Gears
EN 10025S235JR · S355J2Hex/Round8-200235-355Construction · Machinery
JIS G3101SS330 · SS400Square/Round10-250215-245Industrial hardware
DIN 17200C22 · C45Round/Hex5-150340-490Automotive components
GB/T 69920# · 45#Flat/Round8-200245-355Hydraulic cylinders
ASTM A276304 · 316Round Square8-250205-310Food processing equipment
ProprietaryHX-HC80Round20-120≥1,020Oil drilling components
(Cold drawn bars: Diameter ±0.05mm · Straightness ≤1mm/m per ASTM A108)   

3. Material Science & Performance Data of Carbon Steel Bar

Chemical Composition Control of Carbon Steel Bar

ElementLow-C Steel (0.1-0.25%C)Medium-C Steel (0.3-0.5%C)High-C Steel (>0.6%C)
C0.18 ± 0.02%0.40 ± 0.03%0.85 ± 0.04%
Mn0.45-0.75%0.60-0.90%0.30-0.60%
P≤0.025%≤0.020%≤0.015%
S≤0.030%≤0.025%≤0.020%

Mechanical Properties by Processing of Carbon Steel Bar

ProcessingTensile (MPa)Elongation%Hardness (HB)Impact (J)
Hot Rolled400-70015-23110-17025-45
Cold Drawn500-9508-15150-22515-35
Heat Treated650-1,05012-18180-30035-60
Precision Ground550-1,1006-12160-25020-40

4. Industry-Specific Solutions of Carbon Steel Bar

Automotive Manufacturing

ComponentPreferred GradeCritical Specifications
Transmission ShaftsAISI 4140 QTHardness 28-32 HRC · Straightness ≤0.1mm/m
Gear BlanksEN 10084 20MnCr5Surface roughness Ra ≤1.6μm · Inclusion rating A≤2.0
Chassis ComponentsASTM A572 Gr.50Charpy impact ≥50J @ -20°C · Yield ≥345 MPa

Construction & Infrastructure

  • Structural Beams: EN 10025 S355J2 · Yield ≥355 MPa · CEV ≤0.43
  • Reinforcement Bars: BS 4449 B500B · Tensile ≥540 MPa · Bend test 90°/5D
  • Bridge Components: ASTM A709 Gr.50 · CTOD ≥0.15mm · HIC tested

Machinery & Tooling

ApplicationGradeMachinability RatingSurface Finish
Hydraulic CylindersAISI 104580% (vs. 1215)Ra 0.8-1.2μm
Molding DiesH13 Tool Steel45%Ra ≤0.4μm
Jig ComponentsC45 Precision Ground75%Ra 0.3-0.6μm

5. Value-Added Processing Services for Carbon Steel Bar

ServiceTechnical SpecificationEquipment
Precision Cutting±0.1mm tolerance · Max Ø300mmCNC band saws · Abrasive waterjet
TurningTolerance ±0.01mm · Max Ø500mmCNC lathes (Okuma · Mazak)
Heat TreatmentHardness ±1 HRC · Case depth ±0.05mmVacuum furnaces · Induction lines
Surface GrindingFlatness ±0.02mm/300mm · Ra 0.2μmRotary surface grinders
CoatingZn plating · Phosphate · Black oxideAutomated coating lines

6. Global Logistics & Compliance of Carbon Steel Bar

ParameterCapabilityCertifications
Material TraceabilityEN 10204 3.1/3.2 · Lot traceabilityISO 9001 · IATF 16949 · API Q1
Quality TestingSpectro analysis · Ultrasonic testing · PMIASTM E1476 · ISO 17025
Export PackingVCI film · Desiccant · Hardwood cratesIPPC · ISPM15 certified
MOQ500 kg (stock) · 1 MT (custom sizes)25,000 tons monthly capacity
Shipment Volume20-40 containers/week · Breakbulk cargoFCA · FOB · CIF terms

7. FAQs

Material Specifications

A: Yes – Our induction hardening achieves ±5 HBW consistency per batch.

A: Machinability index of 140% (vs. 100% for 1117) · Lead content 0.20-0.35%

A: Sustained service at 1150°C · Carburization resistance >1100°C

A: Standard tolerances:

Diameter (mm)h6 Tolerance (μm)
200/-13
500/-16
1000/-22

A: ≤1.5mm/m per JIS G3191 · Stress-relieved option ≤0.5mm/m

A: Our HX-SS80 grade passes:

  • H2S threshold stress ≥90% SMYS
  • SSC tested per NACE TM0177 Method A

A: 18 days (15 days processing + 3 days port handling)

A: Triple-layer system:

  1. VCI corrosion inhibitor paper
  2. Dessicant packs (RH<8%)
  3. Sealed polyethylene wrap

Why Choose Huaxiao-Alloy for Carbon Steel Bar?

  1. Full-Grade Mastery

    • All standard alloys: ASTM, EN, DIN, JIS, GB
    • 28 proprietary grades for extreme conditions
    • Stock profiles: Round (Ø5-300mm), Flat (10-150×30-500mm), Hex (6-100mm AF)
  2. Precision Processing

    • Diameter tolerance: ±0.005mm for precision bars
    • Straightness control: ≤0.05mm/m for shafting
    • Surface quality: Ra ≤0.2μm for ground bars
  3. Certified Quality
    https://via.placeholder.com/800×100?text=API+Q1+%7C+ISO+9001+%7C+IATF+16949+%7C+PED+2014/68/EU

  4. Global Logistics

    • Containerized/breakbulk shipments from 5 ports
    • In-house customs clearance teams
    • 25,000m² covered warehouse capacity

7*24 Customer Service

Phone:

+86 13012867759

+86 21-57425826

Address

557RM, 3#LOU 1388#, JIANG YUE ROAD, Minhang District, Shanghai,  201114, SHANGHAI,  China

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