ASTM F436 / F436M Hardened Steel Washer MTC Certificate Sample
Access a professional Material Test Certificate for ASTM F436 / F436M hardened steel washers. This documentation covers the rigorous testing protocols required to verify the hardening and dimensional integrity standard for Ananka Fasteners' structural components.
What's Inside This F436 MTC Documentation
This mill test certificate verifies the essential mechanical and chemical requirements of ASTM F436 / F436M, the standard specification for hardened steel washers used in structural steel bolt assemblies.
- Full Traceability: Certified with TC No.: S215/26-XX, linking directly to the raw material melt, heat treatment batch, and final inspection records.
- Hardened Steel Composition: Verification of steel chemistry (typically medium carbon steel) specifically balanced to achieve required hardness after heat treatment.
- Mechanical Performance: Rigorous verification of hardness levels (typically 38-45 HRC for through-hardened washers, or 26-45 HRC for carburized washers), ensuring they can withstand high clamping loads without deforming.
- Quality Compliance: Verification of dimensions, flatness, and freedom from surface defects, ensuring high-performance pairing with structural bolts (like A325 or A490).
Live Preview: F436 Hardened Washer MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S215/26-XX
TC Date
18.07.20XX
ASTM Spec
ASTM F436 / F436M
Washer Type
Through-Hardened
Heat Treatment
Quenched & Tempered
Quantity
2500.00 NOS
Hardness & Quality Verification
| HARDNESS (HRC) | FLATNESS (mm) | SURFACE FINISH | DIMENSIONAL STATUS |
|---|---|---|---|
| 40, 42, 41 | < 0.50 | Plain/Oil | PASS |
| Min: 38 Max: 45 |
Max: Per Spec | — | — |
Standard Compliance Overview
ASTM F436 washers are critical components in structural bolt assemblies. The MTC validates that every washer has passed testing to ensure it can distribute clamping loads without yielding.
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Dimensional Accuracy | Passes all OD, ID, and thickness checks per F436 specs. |
| Surface Integrity | Free from quenching cracks or surface discontinuities. |
| Heat Treatment | Certified Quenched & Tempered (Through-Hardened). |
Understanding ASTM F436
Hardened washers to F436 are necessary for high-strength structural bolting. They prevent damage to structural members under high-clamping forces and ensure the bolt tension is distributed evenly across the joint.
Metallurgical Quality
- Alloy/Carbon steel hardened
- Uniform microstructure
- Controlled chemistry
Structural Reliability
- Hardness tested per lot
- Stress-distribution capability
- Structural safety certified
Washer Performance
- Prevents bolt-head indentation
- Ensures tension uniformity
Technical FAQs — ASTM F436 Washers
Why are hardened washers (F436) required for high-strength bolts (A325/A490)?
Standard mild-steel washers will crush or deform under the extreme clamping forces generated by high-strength structural bolts (like ASTM A325 or A490). Hardened F436 washers are specifically heat-treated to resist this deformation, ensuring that the intended bolt tension is maintained across the structural connection without damaging the mating surface.
What is the difference between "Through-Hardened" and "Carburized" F436 washers?
Through-hardened washers are uniformly hardened across their entire cross-section, providing consistent hardness. Carburized washers (often designated Type 3 or for specific requirements) undergo a surface hardening process that produces a very hard exterior while maintaining a tougher core. The MTC will explicitly identify the heat treatment type used for your specific batch.
Can F436 washers be used with any bolt grade?
While they can be used with lower-strength bolts, they are mandatory for use with high-strength bolts (A325, A490, etc.) in structural joints. Because they are hardened, they can occasionally be brittle if impacted directly; they are intended to be placed in compression between the bolt/nut and the structural steel member.