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Category Archives: Normas ASTM

ASTM APLICADA EN LODOS DE PERFORACION




José pregunta: Para las bentonitas de perforación petrolera ¿cuál es la Norma ASTM que se aplica?

Which is the astm for oil drilling bentonites?



NORMA ASTM A995




Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts1

2. Referenced Documents
2.1 ASTM Standards:

A 488/A 488M Practice for Steel Castings, Welding, Quali-fication of Procedures and Personnel2
A 703/A 703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts2
E 125 Reference Photographs for Magnetic Particle Indica-tions on Ferrous Castings3
E 165 Test Method for Liquid Penetrant Examination3

3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 duplex stainless steel—an iron-chromium-nickel-molybdenum alloy which when properly heat treated consists of approximately 30 to 60 % ferrite with the balance austenite.

ASTM A995 STANDARD




Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

Grade Heat Treatment
  • 1B Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat
  • casting uniformly to temperature, quench in water or rapid cool by other means.
  • 2A Heat to 2050°F [1120°C] minimum, hold for sufficient time to heat
  • casting uniformly to temperature, quench in water or rapid cool by other means.
  • 3A Heat to 1950°F [1070°C] minimum, hold for sufficient time to heat
  • casting uniformly to temperature, quench in water or rapid cool by other means.
  • 4A Heat to 2050°F [1120°C] minimum for sufficient time to heat casting
  • uniformly to temperature and water quench, or the casting may be furnace cooled to 1850°F [1010°C] minimum, hold for 15 min minimum and then water quench. A rapid cool by other means may be employed in lieu of water quench.
  • 5A Heat to 2050°F [1120°C] minimum, hold for sufficient time to heat
  • casting to temperature, furnace cool to 191 0°F [1 045°C] minimum, quench in water or rapid cool by other means.
  • 6A Heat to 2010°F [1100°C] minimum, hold for sufficient time to heat
  • casting uniformly to temperature, quench in water or cool rapidly by other means.

NORMA ASTM A536

Standard Specification for Ductile Iron Castings

5. Heat Treatment
5.1 The 60-40-18 grade will normally require a full ferritiz¬ing anneal. The 120-90-02 and the 100-70-03 grades generally require a quench and temper or a normalize and temper, or an isothermal heat treatment. The other two grades can be met either as-cast or by heat treatment. Ductile iron, that is heat treated by quenching to martensite and tempering, may have substantially lower fatigue strength than as cast material of the same hardness.

6. Test Coupons
6.1 The separately cast test coupons from which the tension test specimens are machined shall be cast to the size and shape shown in Fig. 1 or Fig. 2. A modified keel block cast from the mold shown in Fig. 3 may be substituted for the 1-in. Y-block or the 1-in. keel block. The test coupons shall be cast in open molds made of suitable core sand having a minimum wall thickness of 11/2 in. (38-mm) for the 1/2-in. (12.5 mm) and 1-in. (25-mm) sizes and 3-in. (75-mm) for the 3-in. size. The coupons shall be left in the mold until they have cooled to a black color (approximately 900°F (482°C) or less). The size of coupon cast to represent the casting shall be at the option of the purchaser. In case no option is expressed, the manufacturer shall make the choice.

ASTM A536 STANDARD

Standard Specification for Ductile Iron Castings

2. Referenced Documents
2.1 ASTM Standards:

A 370 Test Methods and Definitions for Mechanical Testing of Steel Products2
A 644 Terminology Relating to Iron Castings3
A 732/A 732M Specification for Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures3
E 8 Test Methods for Tension Testing of Metallic Materials4 2.2 Military Standard:
MIL-STD-129 Marking for Shipment and Storages

3. Ordering Information
3.1 Orders for material to this specification shall include the following information:
3.1.1 ASTM designation,
3.1.2 Grade of ductile iron required (see Table 1, and Sections 4 and 9),