Part

250

251

252

SOURCE: $ 210.1 to 210.33, inclusive, contained in Circular C398, Supplement, Director, National Bureau of Standards, approved by Secretary of Commerce, Dec. 3, 1946, 11 F.R. 14066.

Subpart A-Purchase Procedure

§ 210.1 Identification of samples. The samples are listed by groups; the sample numbers represent the order of issuance of the first representative of each kind. Renewals of an analyzed sample are indicated by the original number, with an added letter to denote its intended relation. Thus, 10a is the first, 10b the second, and 10c the third renewal of No. 10 Bessemer 0.4 C steel. In this way a given number will always represent a material of fixed or approximately fixed composition. Numbers missing from the series in the following table represent samples of which the supply has become exhausted and which it is not the present intention to replace.

§ 210.2 Ordering. Orders should give both the number and name of the sample wanted. Example: No. 9d. steel, Bessemer. 0.2 C. The list of standard samples, their numbers, prices, and analyses are to be found in the succeeding pages. No samples of smaller size than those listed are distributed.

For hydrocarbons see special order procedure indicated in § 210.11 (w).

§ 210.3 Terms

of shipping—(a) Domestic. Samples must be paid for in advance with order. The former practice of sending samples c. o. d. has been discontinued. No discounts are allowed on any orders. Shipments intended for the United States, its possessions, Mexico, Canada, and Cuba are prepaid, except for oils (see § 210.11 (p)).

(b) Foreign. For foreign shipments other than the above, additional charges for postage and handling will be made for the particular order.

(c) Money orders, etc. Money orders, etc., should be payable to the National Bureau of Standards. Payment for foreign orders should be by an international money order or by a check payable through the New York Clearing House or a bank in the United States.

122a

82

Schedule of Weights and Fees

107

115

Cast iron (car wheel).

Nickel-chromium cast iron....

Nickel-molybdenum cast iron.

Nickel-chromium-copper

NOTE: For detailed information on compositions and properties certified see Subpart C.

§ 210.11 Descriptive list-(a) Steels (Chemical Standards).

(c) Steel-making alloys.

iron..

55b

Ingot iron.

Mole percent

0.10 +0.05

10±0.05 10±0.05 23±0.07 4.25±0.15 13±0.03 21±0.06 4.25±0.15 17±0.05 20±0.15 06±0.03 06±0.04 41±0.18

50 +0.23 12±0.07 4.30±0.20 29±0.11 4.30±0.20 4.30±0.20 30+0.09 30±0.20 4.30±0.20 23±0.11 08±0.04

243-58

..do.

2,2,3-Trimethylpentane.

...do se

do 56

2,2,4-Trimethylpentane 5. .do 56

2,3,3-Trimethylpentane.

2,3,4-Trimethylpentane.

252-58 CoH20

n-Nonane.

254-5S ...do.

2,2,5-Trimethylhexane.

256-58 ..do.

2,4,4-Trimethylhexane.

2,2,3,3-Tetramethylpentane.

2,2,3,4-Tetramethylpentane.

2,2,4,4-Tetramethylpentane.

2,3,3,4-Tetramethylpentane.

3,3-Diethylpentane.

505-5S C10H22

n-Decane.