ASTM 201 304 316 Stainless Steel Rebar 6mm-30mm Diameter Concrete Reinforcement Grade 60 Coiled Carbon Steel Rebar Custom Cut Length Straight Bar Coil Bar

ASTM 201 / 304 / 316 Stainless Steel Rebar & Carbon Steel Rebar Concrete Reinforcement steel rebar

1. Product Overview

1. Austenitic Stainless Steel Rebar (Grade 201, 304, 316, ASTM A1022/A1022M standard)
2. Carbon Steel Rebar (ASTM A615/A615M standard)

   Available forms: straight cut bars & coil bars; diameter range 6mm–30mm; all lengths can be custom cut per client’s construction drawing requirements. Rebars are mostly deformed ribbed bars for mechanical bonding with concrete; plain round bars are optional upon request.

2. Steel Grades, Chemical Composition & Core Mechanical Properties

Part A: Stainless Steel Rebar Grades (201, 304, 316)

Grade 201 Stainless Steel (UNS S20100)

• Chemical composition: Cr 16–18%, Mn 5.5–7.5%, Ni 3.5–5.5%, N ≤0.25%, C ≤0.15%
• Mechanical performance
  • Yield strength: ≥275 MPa
  • Tensile strength: ≥655 MPa
  • Elongation: ≥40%
• Core features: Low nickel, cost-effective; moderate atmospheric corrosion resistance; weaker anti-chloride performance vs 304/316; high work hardening rate.
• Limitation: Not suitable for coastal, salt-spray or chemical corrosive environments.

Grade 304 Stainless Steel (UNS S30400, 18-8 standard stainless)

• Chemical composition: Cr 18%, Ni 8%, C ≤0.08%, no molybdenum
• Mechanical performance
  • Yield strength: ≥290 MPa
  • Tensile strength: ≥620 MPa
  • Elongation: ≥40%
• Core features: Balanced corrosion resistance & cost; resists urban rainwater, mild acid, indoor humidity; widely universal stainless rebar grade.
• Limitation: Poor resistance to high-concentration chloride (seawater, road de-icing salt).

Grade 316 Stainless Steel (UNS S31600)

• Chemical composition: Cr 16–18%, Ni 10–14%, Mo 2–3%, C ≤0.08%
• Mechanical performance
  • Yield strength: ≥290 MPa
  • Tensile strength: ≥620 MPa
  • Elongation: ≥40%
• Core features: Molybdenum alloy added; superior anti-pitting & anti-chloride corrosion; outstanding durability in marine, salt, chemical wastewater environments; best long-life stainless rebar grade.

Part B: Carbon Steel Rebar Grades (ASTM A615 mainstream grades)

1. Grade 40 (280): Min yield strength 280 MPa, low-rise residential, minor secondary reinforcement
2. Grade 60 (420): Min yield strength 420 MPa, global most common grade for general buildings, bridges, roads
3. Grade 80 (550): Min yield strength 550 MPa, high-rise heavy load structural members
4. Grade 100 (690): Min yield strength 690 MPa, ultra-high-strength industrial & large infrastructure

• General mechanical features: Good bendability & weldability; surface rusts quickly under moisture, chloride or chemical exposure; requires periodic maintenance or anti-corrosion coating (epoxy, galvanizing).

3. Full Technical Specifications

3.1 Diameter Range

3.2 Product Forms

1. Straight Bar: Fixed custom cut length (1m–12m standard; any special length customizable); bundled by steel wire, standard 6m/9m/12m factory default length
2. Coil Bar: Hot rolled coil, weight per coil 1–3 tons; convenient for automatic straightening & bending on construction sites, reduces material waste

3.3 Surface Type

• Deformed ribbed rebar (standard): Crescent/spiral transverse ribs, maximizes friction bonding with concrete to prevent structural slip
• Plain round bar (optional): Smooth surface for light secondary reinforcement

3.4 Production Standards

• Stainless rebar: ASTM A1022/A1022M, ASTM A276
• Carbon steel rebar: ASTM A615/A615M

3.5 Tolerance & Custom Service

• Length tolerance: ±5mm for custom cut straight bars
• Diameter dimensional tolerance complies with ASTM standard; surface finish: black hot rolled pickled finish for stainless rebar, black oxide mill scale for carbon rebar
• Custom service: Cut-to-length, bending, threading, epoxy coating, galvanizing per client drawings

4. Key Performance Comparison (Stainless VS Carbon Steel Rebar)

1. Corrosion Resistance
   • Stainless (201/304/316): Self-forming passive chromium oxide film, permanent anti-rust without coating; 316 > 304 > 201 in chloride resistance
   • Carbon steel: No natural anti-corrosion layer; rust expansion cracks concrete, shortens structural service life drastically in corrosive zones
2. Service Life
   • Stainless rebar: 80–120 years maintenance-free for marine/infrastructure
   • Carbon steel: 20–40 years under normal urban environment; <10 years in coastal salt areas without coating
3. Weldability
   • Stainless: Requires dedicated stainless welding rods; sensitive to overheating
   • Carbon steel: Easy welding with ordinary carbon electrodes, simple on-site construction
4. Cost
   • Stainless rebar: High raw material cost (nickel & chromium alloy)
   • Carbon steel: Low cost, dominant for ordinary non-corrosive construction projects
5. Magnetic Property
   • Stainless 201/304/316: Non-magnetic annealed state
   • Carbon steel: Ferromagnetic

5. Applications & Usage Scenarios

5.1 Stainless Steel Rebar (201 / 304 / 316)

Grade 201 Stainless Rebar Usage

• Mild indoor non-corrosive concrete structures: residential balcony slabs, indoor small foundation, decorative concrete components
• Dry inland low-humidity construction projects with limited budget for anti-rust reinforcement

Grade 304 Stainless Rebar Usage

• Urban inland infrastructure: municipal road barriers, underground subway inner walls, indoor industrial factory foundations, freshwater reservoir concrete
• Structures requiring long service life without frequent maintenance, no direct seawater/salt exposure

Grade 316 Stainless Rebar Usage (Premium Anti-Corrosion)

1. Marine engineering: sea walls, piers, jetties, coastal bridge decks, offshore platform concrete supports
2. Salt-rich environments: cold-region highway decks exposed to de-icing salt, seaside parking garages
3. Chemical & wastewater industry: sewage treatment plant tanks, chemical factory foundation, acid & alkali workshop concrete structures
4. High-end long-lifespan landmark projects: cross-sea bridges, coastal landmark buildings, nuclear power auxiliary concrete components

5.2 Carbon Steel Rebar (Grade40/60/80/100)

• Main structural reinforcement for all ordinary non-corrosive construction

1. Civil residential buildings: columns, beams, floor slabs, foundation raft, staircases
2. Transportation infrastructure: inland highways, tunnels, inland bridges, airport runways
3. General industrial plants: factory columns, crane beam foundations, warehouse ground slabs
4. Precast concrete components: precast wall panels, precast piles, concrete pipe culverts

6. Applicable Industries

1. Construction & Civil Engineering (core industry): residential real estate, commercial high-rises, municipal public works
2. Transportation Infrastructure: highway, bridge, tunnel, port, airport, railway engineering
3. Marine & Offshore Engineering: coastal port, cross-sea passage, offshore wind power base
4. Water Conservancy: reservoir, dam, sewage treatment plant, water supply pipeline engineering
5. Chemical & Energy Industry: chemical plant foundation, power station, nuclear auxiliary facilities
6. Precast Concrete Manufacturing: precast component factories, modular construction industry

7. Applicable Countries & Global Market Coverage

Regions with High Demand for Stainless Steel Rebar

1. North America: United States, Canada – widely used for highway bridge decks, coastal infrastructure to solve de-icing salt corrosion
2. Europe: UK, France, Spain, Norway – long-lifespan public infrastructure, coastal municipal projects
3. Southeast Asia & South Asia: Singapore, Malaysia, Bangladesh, UAE, Saudi Arabia – high humidity & marine climate; 316 stainless rebar is mainstream for port construction
4. East Asia: China, Japan, South Korea – cross-sea bridges, coastal urban landmark buildings
5. Africa: Djibouti, Morocco, Egypt – coastal port & tourism landmark concrete reinforcement

Global Main Market for Carbon Steel Rebar

• South Asia: Bangladesh, India, Pakistan (massive residential & road construction demand)
• Southeast Asia: Vietnam, Indonesia, Thailand
• Middle East: Iraq, Oman, Qatar (inland residential & factory projects)
• Africa: Ethiopia, Kenya, Tanzania
• Americas: Mexico, Brazil, USA inland ordinary construction
• Europe & Central Asia: Russia, Ukraine, Eastern Europe inland infrastructure