HASTELLOY B2 FLAT WASHERS - DIN 125 / UNS N10665

Name: Ananka Group - India's Leading Fasteners Manufacturer Company
Rating: 5 (451 reviews)

■ Dimensions in mm (DIN 125 Type A)

PART NUMBER	NOMINAL SIZE	INNER DIAMETER (d1) Max	OUTER DIAMETER (d2) Max	THICKNESS (s) Max	WEIGHT (Kg / 100 pcs Approx)
AN-FW-B2-M3	M3	3.32	7.00	0.55	0.012
AN-FW-B2-M4	M4	4.48	9.00	0.90	0.031
AN-FW-B2-M5	M5	5.48	10.00	1.10	0.044
AN-FW-B2-M6	M6	6.62	12.00	1.80	0.114
AN-FW-B2-M8	M8	8.62	16.00	1.80	0.214
AN-FW-B2-M10	M10	10.77	20.00	2.20	0.408
AN-FW-B2-M12	M12	13.27	24.00	2.70	0.627
AN-FW-B2-M14	M14	15.27	28.00	2.70	0.860
AN-FW-B2-M16	M16	17.27	30.00	3.30	1.130
AN-FW-B2-M18	M18	19.33	34.00	3.30	1.470
AN-FW-B2-M20	M20	21.33	37.00	3.30	1.720
AN-FW-B2-M22	M22	23.33	39.00	3.30	1.830
AN-FW-B2-M24	M24	25.33	44.00	4.30	3.230

Note: Contact Ananka Group for expanded heavy-duty diameters (up to M56), heavy-duty washers (DIN 9021), and spring washers (DIN 127).

■ Technical Specifications

Material	Hastelloy B2 (Nickel-Molybdenum Solid Solution Alloy)
Standard / Classification	UNS N10665 \| DIN 2.4617 \| Alloy B-2 Density: 9.22 g/cm³ Melting Range: 1330 - 1380°C (2425 - 2515°F)
Mechanical Properties	Tensile Strength: ≥ 760 MPa (110 ksi) Yield Strength (0.2% Offset): ≥ 350 MPa (51 ksi) Elongation (%): ≥ 40% Hardness (Rockwell B): ≤ 100 HRB
Chemical Composition (%)	Ni: Balance \| Mo: 26.0 - 30.0 \| Fe: 2.0 Max \| Cr: 1.0 Max \| Co: 1.0 Max \| Mn: 1.0 Max \| C: 0.02 Max \| Si: 0.10 Max
Manufacturing Specification	Washers are typically stamped or machined from Hastelloy B2 plate, sheet, or strip. Material strictly conforms to ASTM B333 (Standard Specification for Nickel-Molybdenum Alloy Plate, Sheet, and Strip). Dimensional tolerances strictly follow DIN 125, DIN 9021, or ASME B18.22.1.
Types Available	Flat Washers (Form A / Form B), Spring Lock Washers, Belleville Washers, Machined Washers, and Custom Punched Washers.
Properties & Applications	Crucial for distributing loads in highly specific chemical processing applications where fasteners are exposed to extreme reducing conditions. Hastelloy B2 washers ensure joint integrity when submerged in or exposed to pure hydrochloric acid, hydrogen chloride gas, or hot sulfuric acid. Important Engineering Note: Do not utilize Hastelloy B2 washers in oxidizing environments or in systems where iron or copper piping might introduce ferric or cupric salts into the media.
Marking	Due to size constraints and stamping limitations on thin-gauge materials, flat washers are generally not permanently marked unless specifically requested by the client or required by a custom specification.
Qualification & Acceptance	Independently tested for hardness, chemical analysis, and supplied with EN 10204 Type 3.1 Material Test Certification.