METALLIC MATERIAL SPECIFICATION

Transcription

1 1. Scope: Page: 1 of This specification shall be utilized in procurement of AISI 8630 modified steel (UNS G86300) in quenched and tempered condition to 22 HRc maximum hardness These materials meet the requirements of NACE MR0175/ISO for hydrogen sulfide service This material specification is for components with a requirement of corrosion resistance and is readily weldable Maximum limiting diameter in the solid heat treated condition shall be 10. Material above 10 diameter needs to be heat treated in hollow form with maximum wall thickness of Reference Documents: (Use latest revision of documents below): Document ASTM A213 ASTM A370 ASTM A388 ASTM E10 ASTM E18 ASTM E23 ASTM E428 API SPEC 14A API SPEC 17D API 6A/ ISO API 5CT NACE MR0175/ ISO15156 MIL-STD-1684 SAE AMS- H BS 2M 54 MT-16 NDE-31 NDE-35 Description Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes Methods and Def. for Mechanical Testing of Steel Products Standard Practice For Ultrasonic Examination Of Heavy Steel Forgings Brinell hardness Test Methods for Rockwell Hardness / Superficial Hardness of Metallic Materials Charpy Impact Testing of Metallic Materials Standard Practice for Fabrication and Control of Metal, Other than Aluminum, Reference Blocks Used in Ultrasonic Testing Petroleum and natural gas industries Downhole equipment Subsurface safety valve equipment. Design and Operation of Subsea Production Systems-Subsea Wellhead and Tree Equipment. Specification for Wellhead and Christmas Tree Equipment Specification for Casing and Tubing Materials for use in H2S-containing environments in oil and gas production Control of Heat Treatment Heat Treatment of Steel Raw Materials Temperature Control in Heat-Treatment of Metals specification for Quality Assurance Approved Supplier Requirements specification for Ultrasonic examination of wrought metals Shear wave Ultrasonic Examination of Metal Pipe/Tubing and Hollow Bars. QA-31 specification for Quality Assurance Documents and Records

2 3. Requirements: 3.1. Melting: Page: 2 of 5 The material shall be electric furnace melted, vacuum degassed, fine grained alloy steel Chemical Composition: The chemical composition shall satisfy the following requirements Heat Treatment: Element Symbol Percent Carbon C 0.25/0.33 Range Manganese Mn 0.70/1.10 Range Phosphorous P Max Sulfur S Max Chromium Cr 0.85/1.00 Range Molybdenum Mo 0.35/0.45 Range Nickel Ni 0.75/0.90 Range Silicon Si 0.15/0.35 Range Vanadium V Max Copper Cu Max Titanium Ti Max Aluminum Al Max The material shall be quenched and tempered to meet the mechanical properties of section Heat treating equipment qualification and calibration: Furnaces shall be calibrated no less than once a year or when a furnace is moved, repaired or rebuilt. The practice for qualification of heat-treating equipment shall be one of the following: API 6A annex for qualification of heat-treating equipment or other equivalent internationally recognized standard Manufacturers written specifications including acceptance criteria, which are not less stringent than the procedures identified above Temperature monitoring The material temperature shall be measured by use of either a contact surface thermocouple or a heat sink as described in API 6A, ISO or equivalent international standard.

3 Page: 3 of All heat treatment shall be carried out in accordance with written procedures. Temperature, time at temperature and method of cooling must be reported for each cycle The quench media shall be one of the following: Oil Polymer Interrupted water, water or other water equivalent quench The temperature of the water or the quench media with cooling rate approximately that of water shall not exceed 40 0 C (100 0 F) at the start of the quench. For bath type quenching, the temperature of water or equivalent quench media shall not exceed 50 0 C (120 0 F) at the completion of quench The temperature range for other quenching media shall meet manufacturer written specification If the heat treatment is carried by sub-supplier, heat treater shall ensure the compliance of mechanical properties established in section Mechanical Properties: The test sample shall be drawn from longitudinal direction. The mechanical properties shall be measured in accordance with ASTM A370 and shall conform to the following. Property 3.5. NDE: Material must be examined by UT after heat treatment as per NDE-31 for solids and as per NDE-35 for hollows. UT demonstrated by comparable industry standards like ASTM E428, ASTM A213 (For tubing), ASTM A388 (For solids), API 6A PSL 3, API 5CT, SEP 1921 is acceptable. Mill UT is acceptable when heat treatment is performed by mill Welding: Welding by the supplying mill is prohibited Material Quality: Requirement Tensile Strength, ksi (MPa), Min 95 (655) Yield Strength, ksi (MPa), Min 80 (552) Elongation in 4D, %, Min 18 Reduction of Area, %, Min 35 Surface Hardness of Raw Material, BHN, Range Surface Hardness of Finish Part, BHN, Range Transverse Chary F (-29 0 C) or colder, Avg, J(ft-lbs), Min 42 (31) The material shall be free of injurious seams, laps, or other visual imperfections, which, due to their nature, will interfere with the use of the material in machining, or fabrication of suitable parts.

4 3.8. Identification and Packing: Page: 4 of 5 Protection shall be provided to prevent mechanical damage during shipment. Grade, Heat number, heat treat condition shall be clearly marked on individual tube/forge lengths. Other information shall be provided or marked as required by the purchase order Deviation From Requirements: All requests for deviation must be submitted to for review and approval by the engineering department, or directly to the engineer in charge of the project. 4. Documentation And Retention: Supplier records involving this specification must be auditable / retrievable for a period of five (5) years from the date that the raw materials were certified. Supplier should submit the necessary documents from following list along with the certification package Copy of the original mill certificate from the producing mill Copy of actual chemical composition (check analysis) of the material which lists all of the elements specified in paragraph Copy of the final heat treat data including temperature, time at temperature and method of cooling must be reported for each cycle in accordance with paragraph Copy of mechanical properties including impact test results. Test results must meet the requirements of paragraphs The statement of compliance to ultrasonic testing requirements per paragraphs Statement of compliance from mill or supplier conforming compliance with this specification (by number) and the Purchase order (by number and line item number) All documentation generated by this specification shall be retained in accordance with procedure QA Authority 5.1. Amending Authority This document is controlled by Project MatEng. It shall be revised only with the agreement of technical representatives of all Segments using it Interpretation Authority Interpretation authority for this document shall reside with the Materials Engineering or Quality Manager of each Technical Centers using it. No deviation from this specification is permitted without a waiver approved by Engineering.

5 P/N Rev Quality Check List P.O. Ln Item Material Grade AISI 8630 Mod Manufacturer Chemical Composition Mechanical Properties Property Job No. Element Symbol Percent Actual Carbon C 0.25/0.33 Range Manganese Mn 0.70/1.10 Range Phosphorous P Max Sulfur S Max Chromium Cr 0.85/1.00 Range Molybdenum Mo 0.35/0.45 Range Nickel Ni 0.75/0.90 Range Silicon Si 0.15/0.35 Range Vanadium V Max Copper Cu Max Titanium Ti Max Aluminum Al Max Tensile Strength, ksi (MPa), Min 95 (655) Yield Strength, ksi (MPa), Min 80 (552) Elongation in 4D, %, Min 18 Reduction of Area, %, Min 35 Surface Hardness of Raw Material, BHN, Range Surface Hardness of Finish Part, BHN, Range Transverse Chary F (-29 0 C) or colder, Avg, J(ft-lbs), Min 42 (31) Certification Verification of Ultrasonic Inspection of raw material prior to machining Page: 5 of 5 Heat No. Requirement Actual Material Non-Conformance Request (NCR) attached (If applicable)