Steel Plate Supplier in Jakarta – Complete Buying Guide 2025
Steel plates are among the most widely used structural materials in the construction and industrial sectors. Steel Plate Supplier in Jakarta.
Whether you are building warehouses, factories, platforms, heavy equipment, or marine structures, steel plates play a critical role in strength, safety, and long-term durability.
For buyers in Indonesia—especially around the greater Jakarta (Jabodetabek) area—working with a reliable
steel plate supplier in Jakarta is essential. The right supplier ensures that you receive
the correct specifications, consistent quality, and punctual delivery for every stage of your project.
This 2025 buying guide is written for contractors, project owners, engineers, and procurement teams who need a
clear, practical reference before ordering steel plates. It explains the main types of plates, international
standards (ASTM, JIS, EN), technical considerations, logistics, and how to choose a trusted supplier in Jakarta.
Harapan Mitra Group, based in North Jakarta, is one of the distributors specializing in
construction steel products. The company supplies a full range of steel plates, including mild steel plates,
checker plates, stainless steel plates, cold-rolled plates, and flat bars, supported by its own delivery fleet.
📞 WhatsApp Steel Plate Sales: +62 818-767-977
Table of Contents
- Understanding Steel Plates and Their Applications
- Main Types of Steel Plates Available in Jakarta
- International Standards: ASTM, JIS, and EN
- Technical Specifications and Typical Dimensions
- How to Choose the Right Steel Plate Supplier in Jakarta
- Steel Plate Buying Checklist for 2025
- Why Harapan Mitra Group Is a Trusted Steel Plate Supplier
- Contact & Ordering Information
- Frequently Asked Questions (FAQ)
1. Understanding Steel Plates and Their Applications
Steel plates are flat rectangular sheets produced through rolling processes, either hot-rolled or cold-rolled.
The combination of high strength, formability, and weldability makes steel plates a core material in many sectors.
Typical Applications of Steel Plates
- Building structures: columns, base plates, beams, and floor plates.
- Industrial floors, platforms, catwalks, and walkways.
- Heavy equipment and machinery components.
- Truck bodies, trailers, and commercial vehicle parts.
- Shipbuilding, marine structures, and dock facilities.
- Storage tanks and industrial vessels.
- Architectural features and decorative steel work.
- Food, pharmaceutical, and laboratory equipment (for stainless steel plates).
In Jakarta and its industrial corridors such as Bekasi, Karawang, Cikarang, and Tangerang, steel plates are
supplied daily to contractors, fabricators, factories, and engineering workshops. A strong relationship with a
professional supplier helps ensure that these projects stay on schedule and within budget.
Watch a short video that explains basic concepts of steel and manufacturing processes:
2. Main Types of Steel Plates Available in Jakarta
Steel plate suppliers in Jakarta normally carry several core categories. The following overview will help you
choose the correct type for each application.
2.1 Mild Steel Plates (Hot-Rolled Steel Plates)
Mild steel plates are produced by hot rolling slabs at high temperature. The surface is slightly rougher than
cold-rolled material but offers excellent mechanical strength and is ideal for structural use.
Typical uses:
- General construction and building frameworks.
- Base plates for columns and equipment foundations.
- Machine frames, supports, and reinforcing plates.
- Truck bodies and industrial vehicle structures.
In Indonesia, common grades include ASTM A36 or JIS SS400, both widely used
for structural construction.
2.2 Checker Plates (Chequered / Diamond Plates)
Checker plates feature raised patterns, usually diamond or tear-drop shapes, providing slip resistance for
people walking on the surface. This makes them highly suitable for safety-critical flooring. Steel Plate Supplier in Jakarta.
Typical uses:
- Factory and warehouse floors.
- Stair treads and access ramps.
- Maintenance platforms and catwalks.
- Truck and trailer decking.
2.3 Cold-Rolled Plates (CR Plates)
Cold-rolled plates are processed at room temperature to achieve smooth surfaces and tight dimensional tolerances.
They are usually thinner and used where appearance and precision matter.
Typical uses:
- Interior finishing and architectural panels.
- Automotive body parts and components.
- Electrical and electronic enclosures.
- Consumer products and home appliances.
2.4 Stainless Steel Plates
Stainless steel plates provide corrosion resistance and an attractive appearance. The most common grades are
SUS 201, SUS 304, and SUS 316, each with different corrosion resistance and mechanical properties.
Typical uses:
- Food and beverage processing equipment.
- Commercial kitchens in hotels and restaurants.
- Pharmaceutical and laboratory facilities.
- Marine and chemical environments.
- Decorative cladding and premium architectural features.
2.5 Flat Bars / Strip Plates
Flat bars, sometimes called strip plates, are long rectangular sections cut from plates or rolled directly.
They are popular in light construction, gates, railings, canopies, and various fabrication works.
- Gate and fence frames.
- Door and window frames.
- Canopy structures and roof trusses.
- Bracing, stiffeners, and small brackets.
A complete steel plate supplier in Jakarta should be able to stock all these varieties and offer
cut-to-size services when required.
3. International Standards: ASTM, JIS, and EN
Steel plates are produced according to international standards that define their chemical composition and mechanical
properties. When you specify these standards, you reduce the risk of receiving substandard material.
3.1 ASTM Standards
- ASTM A36 – General-purpose structural steel plate.
- ASTM A516 – Pressure vessel quality steel for boilers and tanks.
- ASTM A572 – High-strength low-alloy steel for demanding structures.
3.2 JIS (Japanese Industrial Standards)
- JIS SS400 – Structural steel plate comparable to ASTM A36.
- JIS G4304 / G4305 – Stainless steel hot-rolled and cold-rolled plates.
- SUS 201 / 304 / 316 – Stainless steel grades widely used in industry.
3.3 EN (European Norm) Standards
- EN 10025 S235 / S275 / S355 – Popular structural grades used across Europe.
- EN 10088 – Stainless steel standards for plates and strips.
When requesting quotations, always mention the required standard and ask your supplier for
Mill Test Certificates (MTC) if the project demands documented proof of material quality. Steel Plate Supplier in Jakarta.
For additional technical background, you may refer to organisations such as
World Steel Association
and ASTM International.
4. Technical Specifications and Typical Dimensions
The table below summarises typical thickness ranges, standard dimensions, and key applications for the main
steel plate types carried by suppliers in Jakarta.
| Plate Type | Typical Thickness Range | Standard Dimensions (L × W) | Main Applications |
|---|---|---|---|
| Mild Steel Plate (HR) | 2.3 mm – 25 mm | 2.4 m × 1.2 m, 6 m × 1.5 m | General construction, base plates, machine frames |
| Checker Plate | 2.8 mm – 10 mm | 2.4 m × 1.2 m | Anti-slip floors, ramps, stairs, truck decks |
| Cold-Rolled Plate | 0.6 mm – 3 mm | 1 m × 2 m, 1.2 m × 2.4 m | Interior panels, automotive, electrical housings |
| Stainless Steel Plate | 0.5 mm – 12 mm | 1.22 m × 2.44 m (common) | Food processing, hygienic equipment, marine use |
| Flat Bar / Strip Plate | 3 mm – 12 mm | Width 20–200 mm, length 6 m | Frames, canopies, light structures, decorative steel |
Exact dimensions and thicknesses may vary by mill and stock availability. A professional supplier will provide
up-to-date stock lists and offer cutting services to match your drawings.
5. How to Choose the Right Steel Plate Supplier in Jakarta
The best supplier is not always the cheapest one. For long-term projects, you need a partner that can deliver
consistent quality, honest communication, and technical support.
5.1 Stock Availability
Check whether the supplier maintains real stock in its own warehouse. Sufficient stock of plates, beams,
reinforcement bars, and hollow sections will help your project avoid unnecessary delays.
5.2 Delivery Capability
Jakarta traffic is a serious challenge. Ask your supplier about:
- In-house trucks and delivery schedule.
- Loading times at the warehouse.
- Delivery windows that match your project’s working hours.
5.3 Quality Assurance
Request samples or photos of previous deliveries, ask about quality control procedures, and verify that the
supplier is willing to provide MTCs for critical applications such as pressure vessels or high-rise structures.
5.4 Transparent Pricing and Quotations
A reliable steel plate supplier in Jakarta should provide written quotations clearly stating:
- Plate type and grade (e.g., A36, SS400, SUS 304).
- Thickness and dimensions.
- Unit price and total cost.
- Delivery terms and payment terms.
5.5 Technical Consultation
If your team is unsure about the required thickness or grade, a good supplier will offer consultation based
on experience with similar projects. This can help prevent over-specification (which increases cost) or
under-specification (which risks structural problems). Steel Plate Supplier in Jakarta.
6. Steel Plate Buying Checklist for 2025
Before placing your purchase order, review this quick checklist:
- Have you defined the application of the plate (flooring, structure, tank, decoration)?
- Do you know the required standard and grade (ASTM, JIS, EN, A36, SS400, etc.)?
- Have you confirmed the thickness and dimensions with your engineer?
- Is cutting, drilling, or bending service required from the supplier?
- Have you checked the delivery schedule and unloading conditions at site?
- Do you need Mill Test Certificates or only commercial quality?
- Have you received at least one written quotation with full details?
Answering these questions beforehand will make communication with your supplier faster and more efficient.
7. Why Harapan Mitra Group Is a Trusted Steel Plate Supplier in Jakarta
Harapan Mitra Group (HMG) is an Indonesian distributor focused on construction steel and building materials.
From its base in North Jakarta, HMG serves contractors, factories, and workshops across Jabodetabek.
7.1 Complete Product Range
- Mild steel plates and structural steel.
- Checker plates for safe industrial flooring.
- Cold-rolled plates for precise and aesthetic applications.
- Stainless steel plates for hygienic and corrosion-resistant environments.
- Flat bars, beams, hollow sections, and reinforcement bars.
For Indonesian-language product categories, you can also refer to:
Plat Hitam,
Plat Bordes,
Plat Putih,
Plat Stainless, and
Plat Strip.
7.2 Logistics and Delivery
HMG operates its own fleet of trucks (from light trucks to Fuso units), allowing flexible delivery scheduling to
Jakarta, Bekasi, Tangerang, Bogor, Cikarang, Karawang, and surrounding cities. Steel Plate Supplier in Jakarta.
7.3 Competitive Pricing
Through close cooperation with mills and importers, Harapan Mitra Group offers competitive wholesale pricing for
both small and large orders. Volume-based discounts are available for project contracts. Steel Plate Supplier in Jakarta.
7.4 Professional Support
The sales team is experienced in handling project-based orders, preparing quotations, and advising on material
selection. This combination of product range, logistics strength, and technical knowledge makes HMG a strong
candidate when you need a steel plate supplier in Jakarta. Steel Plate Supplier in Jakarta.
8. Contact & Ordering Information
Company: Harapan Mitra Group (PT Harapan Mitra Sejati / PT Harapan Mitra Kreasi)
Location: North Jakarta, Indonesia
Sales & Quotations:
- WhatsApp (preferred): +62 818-767-977 – Sales Proyek
- Phone: +62 818-767-977
- Website: https://harapanmitragroup.co.id/
For faster service, please include in your message:
- Plate type (mild steel, checker, cold-rolled, stainless, flat bar).
- Thickness and size (for example: 6 mm, 2.4 m × 1.2 m).
- Quantity and delivery location.
- Required standard (A36, SS400, SUS 304, etc.).
📲 Contact Steel Plate Sales on WhatsApp
9. Frequently Asked Questions (FAQ)
Q1. Do you accept small orders or only project quantities?
Harapan Mitra Group accepts both small and large orders. However, for the best pricing, we recommend consolidating
your requirements into project-based orders. Steel Plate Supplier in Jakarta.
Q2. Can you deliver outside Jakarta?
Yes. While most deliveries are within Jabodetabek, shipments to nearby industrial areas can be arranged using HMG’s
own trucks or partner logistics. Steel Plate Supplier in Jakarta.
Q3. Do you provide cutting services?
Cut-to-size services are available for many plate types. Please submit your cutting list together with your enquiry
so that the sales team can calculate additional processing time and cost. Steel Plate Supplier in Jakarta.
Q4. Can I request Mill Test Certificates (MTC)?
Yes, MTCs can be provided for projects that require proven material traceability, especially for pressure vessels,
critical structures, or export projects. Steel Plate Supplier in Jakarta.
Q5. Which standards do your steel plates follow?
Most plates follow ASTM, JIS, or EN standards depending on the product type. Common grades include ASTM A36,
JIS SS400, and stainless steel grades SUS 201 / 304 / 316. Specific requirements can be discussed at the quotation
stage. Steel Plate Supplier in Jakarta.
If you are looking for a reliable steel plate supplier in Jakarta in 2025, Harapan Mitra Group is ready to support
your construction and industrial projects with complete products, competitive prices, and professional service.
