ASTM A793
Basic Info
The ASTM A793 standard specifies the manufacturing requirements for cold-rolled stainless steel and carbon steel plates used to extend the surface of metal plates, strips, and sheets. These extended metals are commonly used in applications such as flooring and walkways, guardrails, and decorations. The A793 standard covers the chemical composition, mechanical properties, surface quality, and dimensional requirements of the board to ensure that the product quality meets the standards and can meet various engineering needs.
Characteristics
Raised Patterns: ASTM A793 steel floor plates feature raised patterns or designs on the surface, which enhance traction and provide slip resistance, making them suitable for areas where safety is a concern.
Low-Carbon Steel: These floor plates are typically made from low-carbon steel, which offers good weldability, formability, and durability while maintaining cost-effectiveness.
Versatility: ASTM A793 steel floor plates are versatile and can be used in a variety of applications, including flooring, stairways, transportation equipment, and general structural purposes.
Enhanced Safety: The raised patterns on ASTM A793 floor plates help prevent slipping and improve safety in environments where moisture, oils, or other slippery substances may be present, reducing the risk of accidents and injuries.
Durability: ASTM A793 steel floor plates are durable and resistant to wear and tear, making them suitable for high-traffic areas and harsh environments.
Standardized Specifications: ASTM A793 specifies the dimensions, tolerances, chemical composition, and mechanical properties of steel floor plates to ensure they meet the required performance standards for their intended applications, providing consistency and reliability in their use.
ASTM A793 Data Sheet
Dimensions and Tolerances
Equivalent Grades
Chemical Composition
Mechanical Properties
Fabrication and Welding
Dimensions and Tolerances
Rectangular
Width: 1000 – 4000 mm
Thickness: 1.5 – 6.0 mm
Tolerances for Width: ±3 mm
Tolerances for Thickness: ±10%
Square
Width: Equal to Thickness
Thickness: 1.5 – 6.0 mm
Tolerances for Width: ±3 mm
Tolerances for Thickness: ±10%
Circular
Width: 1000 – 4000 mm
Thickness: 1.5 – 6.0 mm
Tolerances for Width: ±3 mm
Tolerances for Thickness: ±10%
Equivalent Grades
United States
ASTM A240 Type 304, Type 316, Type 430
United Kingdom
BS 1449 Part 2, Grade 304S15, Grade 316S16, Grade 525S17
Germany
DIN EN 10088-2, Grade 1.4301, Grade 1.4401, Grade 1.4916
Japan
JIS G4305, SUS 304, SUS 316, SUS 430
Chemical Composition
Carbon (C)
ASTM A793 Type 304: 0.08% max
ASTM A793 Type 316: 0.08% max
ASTM A793 Type 430: 0.12% max
Manganese (Mn)
ASTM A793 Type 304: 2.00% max
ASTM A793 Type 316: 2.00% max
ASTM A793 Type 430: 1.00% max
Phosphorus (P)
ASTM A793 Type 304: 0.045% max
ASTM A793 Type 316: 0.045% max
ASTM A793 Type 430: 0.040% max
Sulfur (S)
ASTM A793 Type 304: 0.030% max
ASTM A793 Type 316: 0.030% max
ASTM A793 Type 430: 0.030% max
Silicon (Si)
ASTM A793 Type 304: 0.75% max
ASTM A793 Type 316: 0.75% max
ASTM A793 Type 430: 1.00% max
Chromium (Cr)
ASTM A793 Type 304: 18.0 – 20.0%
ASTM A793 Type 316: 16.0 – 18.0%
ASTM A793 Type 430: 16.0 – 18.0%
Nickel (Ni)
ASTM A793 Type 304: 8.0 – 10.5%
ASTM A793 Type 316: 10.0 – 14.0%
ASTM A793 Type 430: –
Molybdenum (Mo)
ASTM A793 Type 304: –
ASTM A793 Type 316: 2.0 – 3.0%
ASTM A793 Type 430: –
Nitrogen (N)
ASTM A793 Type 304: –
ASTM A793 Type 316: –
ASTM A793 Type 430: –
Copper (Cu)
ASTM A793 Type 304: –
ASTM A793 Type 316: –
ASTM A793 Type 430: –
Iron (Fe)
ASTM A793 Type 304: Balance
ASTM A793 Type 316: Balance
ASTM A793 Type 430: Balance
Mechanical Properties
Tensile Strength
ASTM A793 Type 304: 515 – 660 MPa (75 – 100 ksi)
ASTM A793 Type 316: 515 – 660 MPa (75 – 100 ksi)
ASTM A793 Type 430: 450 – 630 MPa (65 – 91 ksi)
Yield Strength
ASTM A793 Type 304: ≥ 205 MPa (≥ 30 ksi)
ASTM A793 Type 316: ≥ 205 MPa (≥ 30 ksi)
ASTM A793 Type 430: ≥ 205 MPa (≥ 30 ksi)
Elongation
ASTM A793 Type 304: ≥ 40%
ASTM A793 Type 316: ≥ 40%
ASTM A793 Type 430: ≥ 22%
Hardness (Brinell)
ASTM A793 Type 304: ≤ 201 HB
ASTM A793 Type 316: ≤ 217 HB
ASTM A793 Type 430: ≤ 183 HB
Hardness (Rockwell B)
ASTM A793 Type 304: ≤ 92 HRB
ASTM A793 Type 316: ≤ 95 HRB
ASTM A793 Type 430: ≤ 88 HRB
Hardness (Rockwell C)
ASTM A793 Type 304: –
ASTM A793 Type 316: –
ASTM A793 Type 430: –
Modulus of Elasticity
ASTM A793 Type 304: 193 GPa (28 × 10^6 psi)
ASTM A793 Type 316: 193 GPa (28 × 10^6 psi)
ASTM A793 Type 430: 200 GPa (29 × 10^6 psi)
Poisson’s Ratio
ASTM A793 Type 304: 0.25
ASTM A793 Type 316: 0.25
ASTM A793 Type 430: 0.27
Shear Modulus
ASTM A793 Type 304: 77 GPa (11.2 × 10^6 psi)
ASTM A793 Type 316: 77 GPa (11.2 × 10^6 psi)
ASTM A793 Type 430: 77 GPa (11.2 × 10^6 psi)
Fabrication and Welding
Cutting
Method: Shearing, Sawing, Plasma Cutting
Guidelines: Use tools designed for stainless steel cutting to minimize contamination and achieve clean edges.
Notes: Ensure proper ventilation during plasma cutting to prevent exposure to fumes.
Forming
Method: Bending, Pressing, Roll Forming
Guidelines: Use equipment with sufficient capacity to avoid work hardening and cracking.
Notes: Annealing or stress relieving may be necessary after forming to restore material properties.
Machining
Method: Turning, Drilling, Milling
Guidelines: Use sharp tools and cutting fluids to reduce work hardening and tool wear.
Notes: Speeds and feeds should be adjusted to prevent work hardening.
Welding
Method: TIG (GTAW), MIG (GMAW), Stick (SMAW)
Guidelines: Select appropriate filler metal matching the base metal grade. Use low heat input to minimize distortion and prevent carbide precipitation.
Notes: Perform post-weld cleaning and passivation to restore corrosion resistance.
Preparation
Guidelines: Ensure proper fit-up and joint preparation to achieve full penetration and minimize distortion.
Notes: Avoid excessive heat input to prevent warping.
Back Purging
Guidelines: Implement back purging with inert gas for critical applications to prevent oxidation and ensure sound welds.
Notes: Perform thorough inspection, including visual, dye penetrant, or radiographic testing, for high-purity applications.
Post-Weld Heat Treatment
Method: Annealing, Stress Relieving
Guidelines: Heat treat as needed to relieve residual stresses and restore material properties.
Notes: Follow recommended temperature and time cycles to prevent grain growth or distortion.
Surface Finishing
Method: Grinding, Polishing, Pickling
Guidelines: Remove scale, oxide, and other contaminants to improve appearance and corrosion resistance.
Notes: Avoid cross-contamination to ensure optimal corrosion resistance.
Inspection and Testing
Method: Visual, Dye Penetrant, Radiographic
Guidelines: Inspect welds for defects such as cracks, porosity, and incomplete fusion. Perform dye penetrant or radiographic testing for critical applications.
Notes: Follow ASTM standards and testing procedures for inspection.
Supplier Considerations
Certifications and Compliance: Look for suppliers who have the necessary certifications and comply with industry standards. This includes certifications related to material quality, manufacturing processes, and environmental management systems. For stainless steel floor plates, relevant certifications may include ISO 9001 (Quality Management System), ISO 14001 (Environmental Management System), and certifications specific to stainless steel production and fabrication. Additionally, ensure that the supplier’s products meet the requirements of ASTM A793 or equivalent standards.
Product Consistency and Quality Assurance: Choose a supplier with a reputation for delivering consistent, high-quality products. Inquire about the supplier’s quality assurance processes and how they ensure the uniformity and reliability of their stainless steel floor plates. Ask for documentation or samples demonstrating the supplier’s track record of meeting ASTM A793 specifications and customer requirements. A supplier with robust quality control measures is more likely to provide reliable products that meet performance expectations.
Technical Support and Expertise: Seek suppliers who offer technical support and expertise to assist customers with product selection, design optimization, and application-specific requirements. Look for suppliers with knowledgeable sales and engineering teams who can provide guidance on material selection, fabrication techniques, and compliance with ASTM A793 standards. A supplier that offers technical assistance throughout the project lifecycle can help customers make informed decisions and address any challenges that arise during implementation.
Reputation and Track Record: Consider the supplier’s reputation and track record within the industry. Look for reviews, testimonials, and references from past customers to gauge the supplier’s reliability, responsiveness, and overall satisfaction levels. A supplier with a positive reputation for delivering on commitments, providing excellent customer service, and resolving issues promptly is more likely to be a trusted partner for sourcing stainless steel floor plates.
