We produce screws, stud bolts and nuts ASTM ASTM A453 GR 660 A/B/C/D, Alloy 286, 1.4980 material.It is a precipitation hardening steel heat resistant, recommended in case of high mechanical resistance and corrosion resistance up to 700°C. It is suitable to be used in jet engines, turbines, gears, paddles, nuts, bolts, spring washers and other devices that require high temperatures resistance. The corrosion resistance of ASTM A453 GR 660 A / B / C / D - ASTM A286 GR 660 is excellent up to 700°C. The oxidation resistance is good up to 800°C in current “on-order” conditions and up to 980°C in fitful “on-order” conditions.

ASTM A453 GR 660 A / B / C / D - ASTM A286 GR 660 can be protected arc welded or arc welded in inert atmosphere. We recommend soluble not aged condition. Soluble operation up to 980°C lasting 1 hour and rapid cooling (by air or by water). Precipitation aging at 720°C lasting 16 hours. Forging gap 1150°C up to 1050°C avoiding to go down 930°C. The warping resistance is higher than the austenitic steels one.

We provide high quality standard material in the following grades:

• A453 G660 Class A
• A453 G660 Class B
• A453 G660 Class C
• A453 G660 Class D

Requirements:

• Z28600+UT
• 1.2779/660 AGED
• ASTM A453 2010 660 class D
• ASTM A370 2010
• ASTM A638 2010 660 TYPE 2
• ASTM A453 2010 660 Class B
• NACE MR0175 2003 S66286 SA,AG

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» ASTM ASTM A453 GR 660 A/B/C/D - ASTM A286 GR 660 COMPARABLE SPECIFICATIONS

EN 10088/3
W.	1.4980
JIS	660
ASTM	660

» ASTM ASTM A453 GR 660 A/B/C/D - ASTM A286 GR 660

C	Ti	B	Si	Mn	Cr	Ni	Mo	V
0.03	2.20	0.005	0.50	1.5	15.00	26	1.30	0.30

» ASTM ASTM A453 GR 660 A/B/C/D - ASTM A286 GR 660 PHYSICAL PROPERTIES

Density

• g/cm3 20°C 7.95

Modulus of elasticity

• N/mm2 20°C 199.000

Thermal conductivity

• W/m.K. (20°C) 12

Specific heat

• J/g.K.(20°C) 460

Thermal expasion coefficient

• 20° - 100°C 16.5
• 20° - 300°C 17.0
• 20° - 538°C 17.6
• 20° - 760°C 18.6

» ASTM ASTM A453 GR 660 A/B/C/D - ASTM A286 GR 660 MECHANICAL PROPERTIES AT ROOM TEMPERATURE

Yield strenght

• RP 0.2 N/mm2 >230

Tensile strength

• Rm N/mm2 650(solubile) 930/1180 (solubile + inv.)

Elongation

• A5% 55(solubile) ≥12 (solubile + inv.)

Reduction of area

• Z% 65(solubile) 45(solubile + inv.)